| Commit message (Collapse) | Author | Age |
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Commit e19a6ee2460b ("arm64: kernel: Save and restore UAO and
addr_limit on exception entry") states that exception handler inherits
the original PSTATE.UAO value, so UAO needes to be reset
explicitly. However, ARM 8.2 Extension documentation says:
PSTATE.UAO is copied to SPSR_ELx.UAO and is then set to 0 on an
exception taken from AArch64 to AArch64
so hardware already does the right thing.
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Change-Id: I2c20b1082d7e096d089097946829550040778c2b
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Aliasing attacks against CPU branch predictors can allow the attacks to
redirect speculative control flow on some CPUs and potentially divulge
information from one context to another.
This patch adds initial skeleton code behind a new Kconfig option to
enable implementation-specific mitigations against these attacks for
CPUs that are affected.
Change-Id: I07fba1943dd63df8951bf68fac947666100e5559
Co-developed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Git-commit: 0f15adbb2861ce6f75ccfc5a92b19eae0ef327d0
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[sramana@codeaurora.org: Fix merge conflicts and make it
compilable on msm-4.4]
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
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* refs/heads/tmp-ef588ef
Linux 4.4.113
MIPS: AR7: ensure the port type's FCR value is used
x86/retpoline: Optimize inline assembler for vmexit_fill_RSB
x86/pti: Document fix wrong index
kprobes/x86: Disable optimizing on the function jumps to indirect thunk
kprobes/x86: Blacklist indirect thunk functions for kprobes
retpoline: Introduce start/end markers of indirect thunk
x86/mce: Make machine check speculation protected
kbuild: modversions for EXPORT_SYMBOL() for asm
x86/cpu, x86/pti: Do not enable PTI on AMD processors
arm64: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls
dm thin metadata: THIN_MAX_CONCURRENT_LOCKS should be 6
dm btree: fix serious bug in btree_split_beneath()
libata: apply MAX_SEC_1024 to all LITEON EP1 series devices
can: peak: fix potential bug in packet fragmentation
ARM: dts: kirkwood: fix pin-muxing of MPP7 on OpenBlocks A7
phy: work around 'phys' references to usb-nop-xceiv devices
tracing: Fix converting enum's from the map in trace_event_eval_update()
Input: twl4030-vibra - fix sibling-node lookup
Input: twl6040-vibra - fix child-node lookup
Input: twl6040-vibra - fix DT node memory management
Input: 88pm860x-ts - fix child-node lookup
x86/apic/vector: Fix off by one in error path
pipe: avoid round_pipe_size() nr_pages overflow on 32-bit
module: Add retpoline tag to VERMAGIC
x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros
sched/deadline: Zero out positive runtime after throttling constrained tasks
scsi: hpsa: fix volume offline state
af_key: fix buffer overread in parse_exthdrs()
af_key: fix buffer overread in verify_address_len()
ALSA: hda - Apply the existing quirk to iMac 14,1
ALSA: hda - Apply headphone noise quirk for another Dell XPS 13 variant
ALSA: pcm: Remove yet superfluous WARN_ON()
futex: Prevent overflow by strengthen input validation
scsi: sg: disable SET_FORCE_LOW_DMA
x86/retpoline: Remove compile time warning
x86/retpoline: Fill return stack buffer on vmexit
x86/retpoline/irq32: Convert assembler indirect jumps
x86/retpoline/checksum32: Convert assembler indirect jumps
x86/retpoline/xen: Convert Xen hypercall indirect jumps
x86/retpoline/hyperv: Convert assembler indirect jumps
x86/retpoline/ftrace: Convert ftrace assembler indirect jumps
x86/retpoline/entry: Convert entry assembler indirect jumps
x86/retpoline/crypto: Convert crypto assembler indirect jumps
x86/spectre: Add boot time option to select Spectre v2 mitigation
x86/retpoline: Add initial retpoline support
kconfig.h: use __is_defined() to check if MODULE is defined
EXPORT_SYMBOL() for asm
x86/asm: Make asm/alternative.h safe from assembly
x86/kbuild: enable modversions for symbols exported from asm
x86/asm: Use register variable to get stack pointer value
x86/mm/32: Move setup_clear_cpu_cap(X86_FEATURE_PCID) earlier
x86/cpu/AMD: Use LFENCE_RDTSC in preference to MFENCE_RDTSC
x86/cpu/AMD: Make LFENCE a serializing instruction
gcov: disable for COMPILE_TEST
ANDROID: sdcardfs: Move default_normal to superblock
blkdev: Refactoring block io latency histogram codes
FROMLIST: arm64: kpti: Fix the interaction between ASID switching and software PAN
FROMLIST: arm64: Move post_ttbr_update_workaround to C code
FROMLIST: arm64: mm: Rename post_ttbr0_update_workaround
sched: EAS: Initialize push_task as NULL to avoid direct reference on out_unlock path
Conflicts:
arch/arm64/include/asm/efi.h
arch/arm64/include/asm/mmu_context.h
drivers/scsi/sg.c
drivers/scsi/ufs/ufshcd.h
Change-Id: Ibfa06af8ef308077aad6995874d4b7b0a73e95f3
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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software PAN
With ARM64_SW_TTBR0_PAN enabled, the exception entry code checks the
active ASID to decide whether user access was enabled (non-zero ASID)
when the exception was taken. On return from exception, if user access
was previously disabled, it re-instates TTBR0_EL1 from the per-thread
saved value (updated in switch_mm() or efi_set_pgd()).
Commit 7655abb95386 ("arm64: mm: Move ASID from TTBR0 to TTBR1") makes a
TTBR0_EL1 + ASID switching non-atomic. Subsequently, commit 27a921e75711
("arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN") changes the
__uaccess_ttbr0_disable() function and asm macro to first write the
reserved TTBR0_EL1 followed by the ASID=0 update in TTBR1_EL1. If an
exception occurs between these two, the exception return code will
re-instate a valid TTBR0_EL1. Similar scenario can happen in
cpu_switch_mm() between setting the reserved TTBR0_EL1 and the ASID
update in cpu_do_switch_mm().
This patch reverts the entry.S check for ASID == 0 to TTBR0_EL1 and
disables the interrupts around the TTBR0_EL1 and ASID switching code in
__uaccess_ttbr0_disable(). It also ensures that, when returning from the
EFI runtime services, efi_set_pgd() doesn't leave a non-zero ASID in
TTBR1_EL1 by using uaccess_ttbr0_{enable,disable}.
The accesses to current_thread_info()->ttbr0 are updated to use
READ_ONCE/WRITE_ONCE.
As a safety measure, __uaccess_ttbr0_enable() always masks out any
existing non-zero ASID TTBR1_EL1 before writing in the new ASID.
Fixes: 27a921e75711 ("arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN")
Acked-by: Will Deacon <will.deacon@arm.com>
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: James Morse <james.morse@arm.com>
Tested-by: James Morse <james.morse@arm.com>
Co-developed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 6b88a32c7af68895134872cdec3b6bfdb532d94e)
Change-Id: Icd6f58f0b12fcfdeaf08dceb36a929f585ac1479
[ghackmann@google.com:
- adjust context
- apply asm-uaccess.h changes to uaccess.h
Signed-off-by: Greg Hackmann <ghackmann@google.com>
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We will soon need to invoke a CPU-specific function pointer after changing
page tables, so move post_ttbr_update_workaround out into C code to make
this possible.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 400a169447ad2268b023637a118fba27246bcc19)
Change-Id: I4e6edb3dcb6aabe9c17e4698619a093e76495b36
Signed-off-by: Greg Hackmann <ghackmann@google.com>
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The post_ttbr0_update_workaround hook applies to any change to TTBRx_EL1.
Since we're using TTBR1 for the ASID, rename the hook to make it clearer
as to what it's doing.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 158d495899ce55db453f682a8ac8390d5a426578)
Change-Id: Iaf152ca1bd0a20bd15a77afac4ad4e9ea8ada08f
Signed-off-by: Greg Hackmann <ghackmann@google.com>
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* refs/heads/tmp-f851888
Linux 4.4.111
Fix build error in vma.c
Map the vsyscall page with _PAGE_USER
proc: much faster /proc/vmstat
module: Issue warnings when tainting kernel
module: keep percpu symbols in module's symtab
genksyms: Handle string literals with spaces in reference files
x86/tlb: Drop the _GPL from the cpu_tlbstate export
parisc: Fix alignment of pa_tlb_lock in assembly on 32-bit SMP kernel
x86/microcode/AMD: Add support for fam17h microcode loading
Input: elantech - add new icbody type 15
ARC: uaccess: dont use "l" gcc inline asm constraint modifier
kernel/signal.c: remove the no longer needed SIGNAL_UNKILLABLE check in complete_signal()
kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals
kernel/signal.c: protect the traced SIGNAL_UNKILLABLE tasks from SIGKILL
kernel: make groups_sort calling a responsibility group_info allocators
fscache: Fix the default for fscache_maybe_release_page()
sunxi-rsb: Include OF based modalias in device uevent
crypto: pcrypt - fix freeing pcrypt instances
crypto: chacha20poly1305 - validate the digest size
crypto: n2 - cure use after free
kernel/acct.c: fix the acct->needcheck check in check_free_space()
x86/kasan: Write protect kasan zero shadow
clocksource: arch_timer: make virtual counter access configurable
arm64: issue isb when trapping CNTVCT_EL0 access
BACKPORT: arm64: Add CNTFRQ_EL0 trap handler
BACKPORT: arm64: Add CNTVCT_EL0 trap handler
ANDROID: sdcardfs: Fix missing break on default_normal
ANDROID: usb: f_fs: Prevent gadget unbind if it is already unbound
arm64: Kconfig: Reword UNMAP_KERNEL_AT_EL0 kconfig entry
arm64: use RET instruction for exiting the trampoline
FROMLIST: arm64: kaslr: Put kernel vectors address in separate data page
FROMLIST: arm64: mm: Introduce TTBR_ASID_MASK for getting at the ASID in the TTBR
FROMLIST: arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0
FROMLIST: arm64: entry: Add fake CPU feature for unmapping the kernel at EL0
FROMLIST: arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native tasks
FROMLIST: arm64: erratum: Work around Falkor erratum #E1003 in trampoline code
FROMLIST: arm64: entry: Hook up entry trampoline to exception vectors
FROMLIST: arm64: entry: Explicitly pass exception level to kernel_ventry macro
FROMLIST: arm64: mm: Map entry trampoline into trampoline and kernel page tables
FROMLIST: arm64: entry: Add exception trampoline page for exceptions from EL0
FROMLIST: arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI
FROMLIST: arm64: mm: Add arm64_kernel_unmapped_at_el0 helper
FROMLIST: arm64: mm: Allocate ASIDs in pairs
FROMLIST: arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN
FROMLIST: arm64: mm: Move ASID from TTBR0 to TTBR1
FROMLIST: arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN
FROMLIST: arm64: mm: Use non-global mappings for kernel space
UPSTREAM: arm64: factor out entry stack manipulation
UPSTREAM: arm64: tlbflush.h: add __tlbi() macro
Conflicts:
arch/arm64/include/asm/cpufeature.h
arch/arm64/kernel/asm-offsets.c
arch/arm64/kernel/cpufeature.c
arch/arm64/kernel/entry.S
arch/arm64/kernel/vmlinux.lds.S
drivers/clocksource/Kconfig
drivers/clocksource/arm_arch_timer.c
drivers/usb/gadget/function/f_fs.c
Change-Id: I41e84762e30c9a7b1e283850c3f780f3dbe86f44
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Since people seem to make a point in breaking the userspace visible
counter, we have no choice but to trap the access. Add the required
handler.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
(cherry picked from commit 6126ce0588eb5a0752d5c8b5796a7fca324fd887)
Change-Id: I0705f47c85a78040df38df18f51a4a22500b904d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Speculation attacks against the entry trampoline can potentially resteer
the speculative instruction stream through the indirect branch and into
arbitrary gadgets within the kernel.
This patch defends against these attacks by forcing a misprediction
through the return stack: a dummy BL instruction loads an entry into
the stack, so that the predicted program flow of the subsequent RET
instruction is to a branch-to-self instruction which is finally resolved
as a branch to the kernel vectors with speculation suppressed.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The literal pool entry for identifying the vectors base is the only piece
of information in the trampoline page that identifies the true location
of the kernel.
This patch moves it into a page-aligned region of the .rodata section
and maps this adjacent to the trampoline text via an additional fixmap
entry, which protects against any accidental leakage of the trampoline
contents.
Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 6c27c4082f4f70b9f41df4d0adf51128b40351df)
Change-Id: Iffe72dc5e7ee171d83a7b916a16146e35ddf904e
[ghackmann@google.com:
- adjust context
- replace ARM64_WORKAROUND_QCOM_FALKOR_E1003 alternative with
compile-time CONFIG_ARCH_MSM8996 check]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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TTBR
There are now a handful of open-coded masks to extract the ASID from a
TTBR value, so introduce a TTBR_ASID_MASK and use that instead.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit b519538dfefc2f8478a1bcb458459c861d431784)
Change-Id: I538071c8ec96dca587205c78839c07b6c772fa91
[ghackmann@google.com: adjust context, applying asm-uaccess.h changes
to uaccess.h instead]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Allow explicit disabling of the entry trampoline on the kernel command
line (kpti=off) by adding a fake CPU feature (ARM64_UNMAP_KERNEL_AT_EL0)
that can be used to toggle the alternative sequences in our entry code and
avoid use of the trampoline altogether if desired. This also allows us to
make use of a static key in arm64_kernel_unmapped_at_el0().
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit ea1e3de85e94d711f63437c04624aa0e8de5c8b3)
Change-Id: I11cb874d12a7d0921f452c62b0752e0028a8e0a7
[ghackmann@google.com:
- adjust context
- apply cpucaps.h changes to cpufeature.h
- replace cpus_have_const_cap() with cpus_have_cap()
- tweak unmap_kernel_at_el0() declaration to match 4.4 APIs]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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We rely on an atomic swizzling of TTBR1 when transitioning from the entry
trampoline to the kernel proper on an exception. We can't rely on this
atomicity in the face of Falkor erratum #E1003, so on affected cores we
can issue a TLB invalidation to invalidate the walk cache prior to
jumping into the kernel. There is still the possibility of a TLB conflict
here due to conflicting walk cache entries prior to the invalidation, but
this doesn't appear to be the case on these CPUs in practice.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit d1777e686ad10ba7c594304429c6045fb79255a1)
Change-Id: Ia6c7ffd47745c179738250afa01cb8bf8594b235
[ghackmann@google.com: replace runtime alternative_if with a
compile-time check for Code Aurora's out-of-tree CONFIG_ARCH_MSM8996.
Kryo needs this workaround too, and 4.4 doesn't have any of the
upstream Falkor errata infrastructure needed to detect this at boot time.]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Hook up the entry trampoline to our exception vectors so that all
exceptions from and returns to EL0 go via the trampoline, which swizzles
the vector base register accordingly. Transitioning to and from the
kernel clobbers x30, so we use tpidrro_el0 and far_el1 as scratch
registers for native tasks.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 4bf3286d29f3a88425d8d8cd53428cbb8f865f04)
Change-Id: Id1e175bdaa0ec2bf8e59f941502183907902a710
[ghackmann@google.com: adjust context, replacing
alternative_if_not ARM64_WORKAROUND_845719 block with upstream version]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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We will need to treat exceptions from EL0 differently in kernel_ventry,
so rework the macro to take the exception level as an argument and
construct the branch target using that.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 5b1f7fe41909cde40decad9f0e8ee585777a0538)
Change-Id: Iab10d2237e24c008d05856a4bd953504de6e10a8
[ghackmann@google.com: adjust context and kernel entry point names]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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To allow unmapping of the kernel whilst running at EL0, we need to
point the exception vectors at an entry trampoline that can map/unmap
the kernel on entry/exit respectively.
This patch adds the trampoline page, although it is not yet plugged
into the vector table and is therefore unused.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit c7b9adaf85f818d747eeff5145eb4095ccd587fb)
Change-Id: Idd27ab26f1ec1db2ff756fc33ebb782201806f7c
[ghackmann@google.com: adjust context]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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With the ASID now installed in TTBR1, we can re-enable ARM64_SW_TTBR0_PAN
by ensuring that we switch to a reserved ASID of zero when disabling
user access and restore the active user ASID on the uaccess enable path.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
commit 27a921e75711d924617269e0ba4adb8bae9fd0d1)
Change-Id: I3b06e02766753c59fac975363a2ead5c5e45b8f3
[ghackmann@google.com: adjust context, applying asm-uaccess.h changes to
uaccess.h]
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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In subsequent patches, we will detect stack overflow in our exception
entry code, by verifying the SP after it has been decremented to make
space for the exception regs.
This verification code is small, and we can minimize its impact by
placing it directly in the vectors. To avoid redundant modification of
the SP, we also need to move the initial decrement of the SP into the
vectors.
As a preparatory step, this patch introduces kernel_ventry, which
performs this decrement, and updates the entry code accordingly.
Subsequent patches will fold SP verification into kernel_ventry.
There should be no functional change as a result of this patch.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[Mark: turn into prep patch, expand commit msg]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
(cherry picked from commit b11e5759bfac0c474d95ec4780b1566350e64cad)
Change-Id: I5883da81b374498f2f9e16ccb596b22c5568f2fe
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Since people seem to make a point in breaking the userspace visible
counter, we have no choice but to trap the access. Add the required
handler.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
(cherry picked from commit 6126ce0588eb5a0752d5c8b5796a7fca324fd887)
Change-Id: I0705f47c85a78040df38df18f51a4a22500b904d
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
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* refs/heads/tmp-4b8fc9f
UPSTREAM: locking: avoid passing around 'thread_info' in mutex debugging code
ANDROID: arm64: fix undeclared 'init_thread_info' error
UPSTREAM: kdb: use task_cpu() instead of task_thread_info()->cpu
Linux 4.4.82
net: account for current skb length when deciding about UFO
ipv4: Should use consistent conditional judgement for ip fragment in __ip_append_data and ip_finish_output
mm/mempool: avoid KASAN marking mempool poison checks as use-after-free
KVM: arm/arm64: Handle hva aging while destroying the vm
sparc64: Prevent perf from running during super critical sections
udp: consistently apply ufo or fragmentation
revert "ipv4: Should use consistent conditional judgement for ip fragment in __ip_append_data and ip_finish_output"
revert "net: account for current skb length when deciding about UFO"
packet: fix tp_reserve race in packet_set_ring
net: avoid skb_warn_bad_offload false positives on UFO
tcp: fastopen: tcp_connect() must refresh the route
net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
bpf, s390: fix jit branch offset related to ldimm64
net: fix keepalive code vs TCP_FASTOPEN_CONNECT
tcp: avoid setting cwnd to invalid ssthresh after cwnd reduction states
ANDROID: keychord: Fix for a memory leak in keychord.
ANDROID: keychord: Fix races in keychord_write.
Use %zu to print resid (size_t).
ANDROID: keychord: Fix a slab out-of-bounds read.
Linux 4.4.81
workqueue: implicit ordered attribute should be overridable
net: account for current skb length when deciding about UFO
ipv4: Should use consistent conditional judgement for ip fragment in __ip_append_data and ip_finish_output
mm: don't dereference struct page fields of invalid pages
signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
lib/Kconfig.debug: fix frv build failure
mm, slab: make sure that KMALLOC_MAX_SIZE will fit into MAX_ORDER
ARM: 8632/1: ftrace: fix syscall name matching
virtio_blk: fix panic in initialization error path
drm/virtio: fix framebuffer sparse warning
scsi: qla2xxx: Get mutex lock before checking optrom_state
phy state machine: failsafe leave invalid RUNNING state
x86/boot: Add missing declaration of string functions
tg3: Fix race condition in tg3_get_stats64().
net: phy: dp83867: fix irq generation
sh_eth: R8A7740 supports packet shecksumming
wext: handle NULL extra data in iwe_stream_add_point better
sparc64: Measure receiver forward progress to avoid send mondo timeout
xen-netback: correctly schedule rate-limited queues
net: phy: Fix PHY unbind crash
net: phy: Correctly process PHY_HALTED in phy_stop_machine()
net/mlx5: Fix command bad flow on command entry allocation failure
sctp: fix the check for _sctp_walk_params and _sctp_walk_errors
sctp: don't dereference ptr before leaving _sctp_walk_{params, errors}()
dccp: fix a memleak for dccp_feat_init err process
dccp: fix a memleak that dccp_ipv4 doesn't put reqsk properly
dccp: fix a memleak that dccp_ipv6 doesn't put reqsk properly
net: ethernet: nb8800: Handle all 4 RGMII modes identically
ipv6: Don't increase IPSTATS_MIB_FRAGFAILS twice in ip6_fragment()
packet: fix use-after-free in prb_retire_rx_blk_timer_expired()
openvswitch: fix potential out of bound access in parse_ct
mcs7780: Fix initialization when CONFIG_VMAP_STACK is enabled
rtnetlink: allocate more memory for dev_set_mac_address()
ipv4: initialize fib_trie prior to register_netdev_notifier call.
ipv6: avoid overflow of offset in ip6_find_1stfragopt
net: Zero terminate ifr_name in dev_ifname().
ipv4: ipv6: initialize treq->txhash in cookie_v[46]_check()
saa7164: fix double fetch PCIe access condition
drm: rcar-du: fix backport bug
f2fs: sanity check checkpoint segno and blkoff
media: lirc: LIRC_GET_REC_RESOLUTION should return microseconds
mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
iser-target: Avoid isert_conn->cm_id dereference in isert_login_recv_done
iscsi-target: Fix delayed logout processing greater than SECONDS_FOR_LOGOUT_COMP
iscsi-target: Fix initial login PDU asynchronous socket close OOPs
iscsi-target: Fix early sk_data_ready LOGIN_FLAGS_READY race
iscsi-target: Always wait for kthread_should_stop() before kthread exit
target: Avoid mappedlun symlink creation during lun shutdown
media: platform: davinci: return -EINVAL for VPFE_CMD_S_CCDC_RAW_PARAMS ioctl
ARM: dts: armada-38x: Fix irq type for pca955
ext4: fix overflow caused by missing cast in ext4_resize_fs()
ext4: fix SEEK_HOLE/SEEK_DATA for blocksize < pagesize
mm/page_alloc: Remove kernel address exposure in free_reserved_area()
KVM: async_pf: make rcu irq exit if not triggered from idle task
ASoC: do not close shared backend dailink
ALSA: hda - Fix speaker output from VAIO VPCL14M1R
workqueue: restore WQ_UNBOUND/max_active==1 to be ordered
libata: array underflow in ata_find_dev()
ANDROID: binder: don't queue async transactions to thread.
ANDROID: binder: don't enqueue death notifications to thread todo.
ANDROID: binder: call poll_wait() unconditionally.
android: configs: move quota-related configs to recommended
BACKPORT: arm64: split thread_info from task stack
UPSTREAM: arm64: assembler: introduce ldr_this_cpu
UPSTREAM: arm64: make cpu number a percpu variable
UPSTREAM: arm64: smp: prepare for smp_processor_id() rework
BACKPORT: arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx
UPSTREAM: arm64: prep stack walkers for THREAD_INFO_IN_TASK
UPSTREAM: arm64: unexport walk_stackframe
UPSTREAM: arm64: traps: simplify die() and __die()
UPSTREAM: arm64: factor out current_stack_pointer
BACKPORT: arm64: asm-offsets: remove unused definitions
UPSTREAM: arm64: thread_info remove stale items
UPSTREAM: thread_info: include <current.h> for THREAD_INFO_IN_TASK
UPSTREAM: thread_info: factor out restart_block
UPSTREAM: kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function
UPSTREAM: sched/core: Add try_get_task_stack() and put_task_stack()
UPSTREAM: sched/core: Allow putting thread_info into task_struct
UPSTREAM: printk: when dumping regs, show the stack, not thread_info
UPSTREAM: fix up initial thread stack pointer vs thread_info confusion
UPSTREAM: Clarify naming of thread info/stack allocators
ANDROID: sdcardfs: override credential for ioctl to lower fs
Conflicts:
android/configs/android-base.cfg
arch/arm64/Kconfig
arch/arm64/include/asm/suspend.h
arch/arm64/kernel/head.S
arch/arm64/kernel/smp.c
arch/arm64/kernel/suspend.c
arch/arm64/kernel/traps.c
arch/arm64/mm/proc.S
kernel/fork.c
sound/soc/soc-pcm.c
Change-Id: I273e216c94899a838bbd208391c6cbe20b2bf683
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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This patch moves arm64's struct thread_info from the task stack into
task_struct. This protects thread_info from corruption in the case of
stack overflows, and makes its address harder to determine if stack
addresses are leaked, making a number of attacks more difficult. Precise
detection and handling of overflow is left for subsequent patches.
Largely, this involves changing code to store the task_struct in sp_el0,
and acquire the thread_info from the task struct. Core code now
implements current_thread_info(), and as noted in <linux/sched.h> this
relies on offsetof(task_struct, thread_info) == 0, enforced by core
code.
This change means that the 'tsk' register used in entry.S now points to
a task_struct, rather than a thread_info as it used to. To make this
clear, the TI_* field offsets are renamed to TSK_TI_*, with asm-offsets
appropriately updated to account for the structural change.
Userspace clobbers sp_el0, and we can no longer restore this from the
stack. Instead, the current task is cached in a per-cpu variable that we
can safely access from early assembly as interrupts are disabled (and we
are thus not preemptible).
Both secondary entry and idle are updated to stash the sp and task
pointer separately.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This is a modification of Mark Rutland's original patch. Guards to check
if CONFIG_THREAD_INFO_IN_TASK is used has been inserted. get_current()
for when CONFIG_THREAD_INFO_IN_TASK is not used has been added to
arch/arm64/include/asm/current.h.
Bug: 38331309
Change-Id: Ic5eae344a7c2baea0864f6ae16be1e9c60c0a74a
(cherry picked from commit c02433dd6de32f042cf3ffe476746b1115b8c096)
Signed-off-by: Zubin Mithra <zsm@google.com>
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Shortly we will want to load a percpu variable in the return from
userspace path. We can save an instruction by folding the addition of
the percpu offset into the load instruction, and this patch adds a new
helper to do so.
At the same time, we clean up this_cpu_ptr for consistency. As with
{adr,ldr,str}_l, we change the template to take the destination register
first, and name this dst. Secondly, we rename the macro to adr_this_cpu,
following the scheme of adr_l, and matching the newly added
ldr_this_cpu.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Bug: 38331309
Change-Id: Iaaf4ea9674ab89289badee216b5305204172895e
(cherry picked from commit 1b7e2296a822dfd2349960addc42a139360ce769)
Signed-off-by: Zubin Mithra <zsm@google.com>
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* refs/heads/tmp-e76c0fa
Linux 4.4.72
arm64: ensure extension of smp_store_release value
arm64: armv8_deprecated: ensure extension of addr
usercopy: Adjust tests to deal with SMAP/PAN
RDMA/qib,hfi1: Fix MR reference count leak on write with immediate
arm64: entry: improve data abort handling of tagged pointers
arm64: hw_breakpoint: fix watchpoint matching for tagged pointers
Make __xfs_xattr_put_listen preperly report errors.
NFSv4: Don't perform cached access checks before we've OPENed the file
NFS: Ensure we revalidate attributes before using execute_ok()
mm: consider memblock reservations for deferred memory initialization sizing
net: better skb->sender_cpu and skb->napi_id cohabitation
serial: sh-sci: Fix panic when serial console and DMA are enabled
tty: Drop krefs for interrupted tty lock
drivers: char: mem: Fix wraparound check to allow mappings up to the end
ASoC: Fix use-after-free at card unregistration
ALSA: timer: Fix missing queue indices reset at SNDRV_TIMER_IOCTL_SELECT
ALSA: timer: Fix race between read and ioctl
drm/nouveau/tmr: fully separate alarm execution/pending lists
drm/vmwgfx: Make sure backup_handle is always valid
drm/vmwgfx: limit the number of mip levels in vmw_gb_surface_define_ioctl()
drm/vmwgfx: Handle vmalloc() failure in vmw_local_fifo_reserve()
perf/core: Drop kernel samples even though :u is specified
powerpc/hotplug-mem: Fix missing endian conversion of aa_index
powerpc/numa: Fix percpu allocations to be NUMA aware
powerpc/eeh: Avoid use after free in eeh_handle_special_event()
scsi: qla2xxx: don't disable a not previously enabled PCI device
KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
btrfs: fix memory leak in update_space_info failure path
btrfs: use correct types for page indices in btrfs_page_exists_in_range
cxl: Fix error path on bad ioctl
ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
ufs: set correct ->s_maxsize
ufs: restore maintaining ->i_blocks
fix ufs_isblockset()
ufs: restore proper tail allocation
fs: add i_blocksize()
cpuset: consider dying css as offline
Input: elantech - add Fujitsu Lifebook E546/E557 to force crc_enabled
drm/msm: Expose our reservation object when exporting a dmabuf.
target: Re-add check to reject control WRITEs with overflow data
cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
random: properly align get_random_int_hash
drivers: char: random: add get_random_long()
iio: proximity: as3935: fix AS3935_INT mask
iio: light: ltr501 Fix interchanged als/ps register field
staging/lustre/lov: remove set_fs() call from lov_getstripe()
usb: chipidea: debug: check before accessing ci_role
usb: chipidea: udc: fix NULL pointer dereference if udc_start failed
usb: gadget: f_mass_storage: Serialize wake and sleep execution
ext4: fix fdatasync(2) after extent manipulation operations
ext4: keep existing extra fields when inode expands
ext4: fix SEEK_HOLE
xen-netfront: cast grant table reference first to type int
xen-netfront: do not cast grant table reference to signed short
xen/privcmd: Support correctly 64KB page granularity when mapping memory
dmaengine: ep93xx: Always start from BASE0
dmaengine: usb-dmac: Fix DMAOR AE bit definition
KVM: async_pf: avoid async pf injection when in guest mode
arm: KVM: Allow unaligned accesses at HYP
KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation
kvm: async_pf: fix rcu_irq_enter() with irqs enabled
nfsd: Fix up the "supattr_exclcreat" attributes
nfsd4: fix null dereference on replay
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
crypto: gcm - wait for crypto op not signal safe
KEYS: fix freeing uninitialized memory in key_update()
KEYS: fix dereferencing NULL payload with nonzero length
ptrace: Properly initialize ptracer_cred on fork
serial: ifx6x60: fix use-after-free on module unload
arch/sparc: support NR_CPUS = 4096
sparc64: delete old wrap code
sparc64: new context wrap
sparc64: add per-cpu mm of secondary contexts
sparc64: redefine first version
sparc64: combine activate_mm and switch_mm
sparc64: reset mm cpumask after wrap
sparc: Machine description indices can vary
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
net: bridge: start hello timer only if device is up
net: ethoc: enable NAPI before poll may be scheduled
net: ping: do not abuse udp_poll()
ipv6: Fix leak in ipv6_gso_segment().
vxlan: fix use-after-free on deletion
tcp: disallow cwnd undo when switching congestion control
cxgb4: avoid enabling napi twice to the same queue
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
bnx2x: Fix Multi-Cos
ANDROID: uid_sys_stats: check previous uid_entry before call find_or_register_uid
ANDROID: sdcardfs: d_splice_alias can return error values
Change-Id: I829ebf1a9271dcf0462c537e7bfcbcfde322f336
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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Changes in 4.4.72
bnx2x: Fix Multi-Cos
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
cxgb4: avoid enabling napi twice to the same queue
tcp: disallow cwnd undo when switching congestion control
vxlan: fix use-after-free on deletion
ipv6: Fix leak in ipv6_gso_segment().
net: ping: do not abuse udp_poll()
net: ethoc: enable NAPI before poll may be scheduled
net: bridge: start hello timer only if device is up
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
sparc: Machine description indices can vary
sparc64: reset mm cpumask after wrap
sparc64: combine activate_mm and switch_mm
sparc64: redefine first version
sparc64: add per-cpu mm of secondary contexts
sparc64: new context wrap
sparc64: delete old wrap code
arch/sparc: support NR_CPUS = 4096
serial: ifx6x60: fix use-after-free on module unload
ptrace: Properly initialize ptracer_cred on fork
KEYS: fix dereferencing NULL payload with nonzero length
KEYS: fix freeing uninitialized memory in key_update()
crypto: gcm - wait for crypto op not signal safe
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
nfsd4: fix null dereference on replay
nfsd: Fix up the "supattr_exclcreat" attributes
kvm: async_pf: fix rcu_irq_enter() with irqs enabled
KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation
arm: KVM: Allow unaligned accesses at HYP
KVM: async_pf: avoid async pf injection when in guest mode
dmaengine: usb-dmac: Fix DMAOR AE bit definition
dmaengine: ep93xx: Always start from BASE0
xen/privcmd: Support correctly 64KB page granularity when mapping memory
xen-netfront: do not cast grant table reference to signed short
xen-netfront: cast grant table reference first to type int
ext4: fix SEEK_HOLE
ext4: keep existing extra fields when inode expands
ext4: fix fdatasync(2) after extent manipulation operations
usb: gadget: f_mass_storage: Serialize wake and sleep execution
usb: chipidea: udc: fix NULL pointer dereference if udc_start failed
usb: chipidea: debug: check before accessing ci_role
staging/lustre/lov: remove set_fs() call from lov_getstripe()
iio: light: ltr501 Fix interchanged als/ps register field
iio: proximity: as3935: fix AS3935_INT mask
drivers: char: random: add get_random_long()
random: properly align get_random_int_hash
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
target: Re-add check to reject control WRITEs with overflow data
drm/msm: Expose our reservation object when exporting a dmabuf.
Input: elantech - add Fujitsu Lifebook E546/E557 to force crc_enabled
cpuset: consider dying css as offline
fs: add i_blocksize()
ufs: restore proper tail allocation
fix ufs_isblockset()
ufs: restore maintaining ->i_blocks
ufs: set correct ->s_maxsize
ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
cxl: Fix error path on bad ioctl
btrfs: use correct types for page indices in btrfs_page_exists_in_range
btrfs: fix memory leak in update_space_info failure path
KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
scsi: qla2xxx: don't disable a not previously enabled PCI device
powerpc/eeh: Avoid use after free in eeh_handle_special_event()
powerpc/numa: Fix percpu allocations to be NUMA aware
powerpc/hotplug-mem: Fix missing endian conversion of aa_index
perf/core: Drop kernel samples even though :u is specified
drm/vmwgfx: Handle vmalloc() failure in vmw_local_fifo_reserve()
drm/vmwgfx: limit the number of mip levels in vmw_gb_surface_define_ioctl()
drm/vmwgfx: Make sure backup_handle is always valid
drm/nouveau/tmr: fully separate alarm execution/pending lists
ALSA: timer: Fix race between read and ioctl
ALSA: timer: Fix missing queue indices reset at SNDRV_TIMER_IOCTL_SELECT
ASoC: Fix use-after-free at card unregistration
drivers: char: mem: Fix wraparound check to allow mappings up to the end
tty: Drop krefs for interrupted tty lock
serial: sh-sci: Fix panic when serial console and DMA are enabled
net: better skb->sender_cpu and skb->napi_id cohabitation
mm: consider memblock reservations for deferred memory initialization sizing
NFS: Ensure we revalidate attributes before using execute_ok()
NFSv4: Don't perform cached access checks before we've OPENed the file
Make __xfs_xattr_put_listen preperly report errors.
arm64: hw_breakpoint: fix watchpoint matching for tagged pointers
arm64: entry: improve data abort handling of tagged pointers
RDMA/qib,hfi1: Fix MR reference count leak on write with immediate
usercopy: Adjust tests to deal with SMAP/PAN
arm64: armv8_deprecated: ensure extension of addr
arm64: ensure extension of smp_store_release value
Linux 4.4.72
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 276e93279a630657fff4b086ba14c95955912dfa upstream.
This backport has a minor difference from the upstream commit: it adds
the asm-uaccess.h file, which is not present in 4.4, because 4.4 does
not have commit b4b8664d291a ("arm64: don't pull uaccess.h into *.S").
Original patch description:
When handling a data abort from EL0, we currently zero the top byte of
the faulting address, as we assume the address is a TTBR0 address, which
may contain a non-zero address tag. However, the address may be a TTBR1
address, in which case we should not zero the top byte. This patch fixes
that. The effect is that the full TTBR1 address is passed to the task's
signal handler (or printed out in the kernel log).
When handling a data abort from EL1, we leave the faulting address
intact, as we assume it's either a TTBR1 address or a TTBR0 address with
tag 0x00. This is true as far as I'm aware, we don't seem to access a
tagged TTBR0 address anywhere in the kernel. Regardless, it's easy to
forget about address tags, and code added in the future may not always
remember to remove tags from addresses before accessing them. So add tag
handling to the EL1 data abort handler as well. This also makes it
consistent with the EL0 data abort handler.
Fixes: d50240a5f6ce ("arm64: mm: permit use of tagged pointers at EL0")
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This is the 4.4.45 stable release
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When the TTBR0 PAN feature is enabled, the kernel entry points need to
disable access to TTBR0_EL1. The PAN status of the interrupted context
is stored as part of the saved pstate, reusing the PSR_PAN_BIT (22).
Restoring access to TTBR0_EL1 is done on exception return if returning
to user or returning to a context where PAN was disabled.
Context switching via switch_mm() must defer the update of TTBR0_EL1
until a return to user or an explicit uaccess_enable() call.
Special care needs to be taken for two cases where TTBR0_EL1 is set
outside the normal kernel context switch operation: EFI run-time
services (via efi_set_pgd) and CPU suspend (via cpu_(un)install_idmap).
Code has been added to avoid deferred TTBR0_EL1 switching as in
switch_mm() and restore the reserved TTBR0_EL1 when uninstalling the
special TTBR0_EL1.
User cache maintenance (user_cache_maint_handler and
__flush_cache_user_range) needs the TTBR0_EL1 re-instated since the
operations are performed by user virtual address.
This patch also removes a stale comment on the switch_mm() function.
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Bug: 31432001
Change-Id: I85a49f70e13b153b9903851edf56f6531c14e6de
(cherry picked from commit 39bc88e5e38e9b213bd7d833ce0df6ec029761ad)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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TTBR0_EL1
This patch adds the uaccess macros/functions to disable access to user
space by setting TTBR0_EL1 to a reserved zeroed page. Since the value
written to TTBR0_EL1 must be a physical address, for simplicity this
patch introduces a reserved_ttbr0 page at a constant offset from
swapper_pg_dir. The uaccess_disable code uses the ttbr1_el1 value
adjusted by the reserved_ttbr0 offset.
Enabling access to user is done by restoring TTBR0_EL1 with the value
from the struct thread_info ttbr0 variable. Interrupts must be disabled
during the uaccess_ttbr0_enable code to ensure the atomicity of the
thread_info.ttbr0 read and TTBR0_EL1 write. This patch also moves the
get_thread_info asm macro from entry.S to assembler.h for reuse in the
uaccess_ttbr0_* macros.
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Bug: 31432001
Change-Id: I54ada623160cb47f5762e0e39a5e84a75252dbfd
(cherry picked from commit 4b65a5db362783ab4b04ca1c1d2ad70ed9b0ba2a)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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based on TTBR0_EL1"
This reverts commit 1911d36b27ba58ee18592df25b7ee636d4d4c41d.
Bug: 31432001
Change-Id: Iee77eed8454f379b948dbbaf65c105952ea30bef
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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This reverts commit 5775ca34829caf0664c8ccc02fd0e93cb6022e0f.
Bug: 31432001
Change-Id: I9b07c2f01bc2bcfed51f60ab487034639f5e1960
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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When the TTBR0 PAN feature is enabled, the kernel entry points need to
disable access to TTBR0_EL1. The PAN status of the interrupted context
is stored as part of the saved pstate, reusing the PSR_PAN_BIT (22).
Restoring access to TTBR0_PAN is done on exception return if returning
to user or returning to a context where PAN was disabled.
Context switching via switch_mm() must defer the update of TTBR0_EL1
until a return to user or an explicit uaccess_enable() call.
Special care needs to be taken for two cases where TTBR0_EL1 is set
outside the normal kernel context switch operation: EFI run-time
services (via efi_set_pgd) and CPU suspend (via cpu_(un)install_idmap).
Code has been added to avoid deferred TTBR0_EL1 switching as in
switch_mm() and restore the reserved TTBR0_EL1 when uninstalling the
special TTBR0_EL1.
This patch also removes a stale comment on the switch_mm() function.
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: Id1198cf1cde022fad10a94f95d698fae91d742aa
(cherry picked from commit d26cfd64c973b31f73091c882e07350e14fdd6c9)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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TTBR0_EL1
This patch adds the uaccess macros/functions to disable access to user
space by setting TTBR0_EL1 to a reserved zeroed page. Since the value
written to TTBR0_EL1 must be a physical address, for simplicity this
patch introduces a reserved_ttbr0 page at a constant offset from
swapper_pg_dir. The uaccess_disable code uses the ttbr1_el1 value
adjusted by the reserved_ttbr0 offset.
Enabling access to user is done by restoring TTBR0_EL1 with the value
from the struct thread_info ttbr0 variable. Interrupts must be disabled
during the uaccess_ttbr0_enable code to ensure the atomicity of the
thread_info.ttbr0 read and TTBR0_EL1 write. This patch also moves the
get_thread_info asm macro from entry.S to assembler.h for reuse in the
uaccess_ttbr0_* macros.
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: Idf09a870b8612dce23215bce90d88781f0c0c3aa
(cherry picked from commit 940d37234182d2675ab8ab46084840212d735018)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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Executing from a non-executable area gives an ugly message:
lkdtm: Performing direct entry EXEC_RODATA
lkdtm: attempting ok execution at ffff0000084c0e08
lkdtm: attempting bad execution at ffff000008880700
Bad mode in Synchronous Abort handler detected on CPU2, code 0x8400000e -- IABT (current EL)
CPU: 2 PID: 998 Comm: sh Not tainted 4.7.0-rc2+ #13
Hardware name: linux,dummy-virt (DT)
task: ffff800077e35780 ti: ffff800077970000 task.ti: ffff800077970000
PC is at lkdtm_rodata_do_nothing+0x0/0x8
LR is at execute_location+0x74/0x88
The 'IABT (current EL)' indicates the error but it's a bit cryptic
without knowledge of the ARM ARM. There is also no indication of the
specific address which triggered the fault. The increase in kernel
page permissions makes hitting this case more likely as well.
Handling the case in the vectors gives a much more familiar looking
error message:
lkdtm: Performing direct entry EXEC_RODATA
lkdtm: attempting ok execution at ffff0000084c0840
lkdtm: attempting bad execution at ffff000008880680
Unable to handle kernel paging request at virtual address ffff000008880680
pgd = ffff8000089b2000
[ffff000008880680] *pgd=00000000489b4003, *pud=0000000048904003, *pmd=0000000000000000
Internal error: Oops: 8400000e [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 997 Comm: sh Not tainted 4.7.0-rc1+ #24
Hardware name: linux,dummy-virt (DT)
task: ffff800077f9f080 ti: ffff800008a1c000 task.ti: ffff800008a1c000
PC is at lkdtm_rodata_do_nothing+0x0/0x8
LR is at execute_location+0x74/0x88
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: Ifba74589ba2cf05b28335d4fd3e3140ef73668db
(cherry picked from commit 9adeb8e72dbfe976709df01e259ed556ee60e779)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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If we take an exception while at EL1, the exception handler inherits
the original context's addr_limit and PSTATE.UAO values. To be consistent
always reset addr_limit and PSTATE.UAO on (re-)entry to EL1. This
prevents accidental re-use of the original context's addr_limit.
Based on a similar patch for arm from Russell King.
Cc: <stable@vger.kernel.org> # 4.6-
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Change-Id: Iab453201c6e08bc6e22500b7c5570dd0fe2d1b74
(cherry picked from commit e19a6ee2460bdd0d0055a6029383422773f9999a)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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Currently we treat ESR_EL1 bit 24 as software-defined for distinguishing
instruction aborts from data aborts, but this bit is architecturally
RES0 for instruction aborts, and could be allocated for an arbitrary
purpose in future. Additionally, we hard-code the value in entry.S
without the mnemonic, making the code difficult to understand.
Instead, remove ESR_LNX_EXEC, and distinguish aborts based on the esr,
which we already pass to the sole use of ESR_LNX_EXEC. A new helper,
is_el0_instruction_abort() is added to make the logic clear. Any
instruction aborts taken from EL1 will already have been handled by
bad_mode, so we need not handle that case in the helper.
For consistency, the existing permission_fault helper is renamed to
is_permission_fault, and the return type is changed to bool. There
should be no functional changes as the return value was a boolean
expression, and the result is only used in another boolean expression.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Dave P Martin <dave.martin@arm.com>
Cc: Huang Shijie <shijie.huang@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: Iaf66fa5f3b13cf985b11a3b0a40c4333fe9ef833
(cherry picked from commit 541ec870ef31433018d245614254bd9d810a9ac3)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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The implementation of macro inv_entry refers to its 'el' argument without
the required leading backslash, which results in an undefined symbol
'el' to be passed into the kernel_entry macro rather than the index of
the exception level as intended.
This undefined symbol strangely enough does not result in build failures,
although it is visible in vmlinux:
$ nm -n vmlinux |head
U el
0000000000000000 A _kernel_flags_le_hi32
0000000000000000 A _kernel_offset_le_hi32
0000000000000000 A _kernel_size_le_hi32
000000000000000a A _kernel_flags_le_lo32
.....
However, it does result in incorrect code being generated for invalid
exceptions taken from EL0, since the argument check in kernel_entry
assumes EL1 if its argument does not equal '0'.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Change-Id: I406c1207682a4dff3054a019c26fdf1310b08ed1
(cherry picked from commit b660950c60a7278f9d8deb7c32a162031207c758)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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In work_pending, we may skip work if the stacked SPSR value represents
anything other than an EL0 context. We then immediately invoke the
kernel_exit 0 macro as part of ret_to_user, assuming a return to EL0.
This is somewhat confusing.
We use work_pending as part of the ret_to_user/ret_fast_syscall state
machine. We only use ret_fast_syscall in the return from an SVC issued
from EL0. We use ret_to_user for return from EL0 exception handlers and
also for return from ret_from_fork in the case the task was not a kernel
thread (i.e. it is a user task).
Thus in all cases the stacked SPSR value must represent an EL0 context,
and the check is redundant. This patch removes it, along with the now
unused no_work_pending label.
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: rework-pagetable
(cherry picked from commit ee03353bc04f8e460cc4e3da80d9721d9ecb89f1)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I2738149342ef469e8cde7c5f8f7c65daab93fb2b
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sysrq_handle_reboot() re-enables interrupts while on the irq stack. The
irq_stack implementation wrongly assumed this would only ever happen
via the softirq path, allowing it to update irq_count late, in
do_softirq_own_stack().
This means if an irq occurs in sysrq_handle_reboot(), during
emergency_restart() the stack will be corrupted, as irq_count wasn't
updated.
Lose the optimisation, and instead of moving the adding/subtracting of
irq_count into irq_stack_entry/irq_stack_exit, remove it, and compare
sp_el0 (struct thread_info) with sp & ~(THREAD_SIZE - 1). This tells us
if we are on a task stack, if so, we can safely switch to the irq stack.
Finally, remove do_softirq_own_stack(), we don't need it anymore.
Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
[will: use get_thread_info macro]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: rework-pagetable
(cherry picked from commit d224a69e3d80fe08f285d1f41d21b590bae4fa9f)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I1f613279bf875443b10d65b1cd1ed4a6abfcb605
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The code for switching to irq_stack stores three pieces of information on
the stack, fp+lr, as a fake stack frame (that lets us walk back onto the
interrupted tasks stack frame), and the address of the struct pt_regs that
contains the register values from kernel entry. (which dump_backtrace()
will print in any stack trace).
To reduce this, we store fp, and the pointer to the struct pt_regs.
unwind_frame() can recognise this as the irq_stack dummy frame, (as it only
appears at the top of the irq_stack), and use the struct pt_regs values
to find the missing interrupted link-register.
Suggested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: rework-pagetable
(cherry picked from commit 971c67ce37cfeeaf560e792a2c3bc21d8b67163a)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I84cbb04857a441083d331e875c3e228d24ec2276
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On entry from el0, we save all the registers on the kernel stack, and
restore them before returning. x29 remains unchanged when we call out
to C code, which will store x29 as the frame-pointer on the stack.
Instead, write 0 into x29 after entry from el0, to avoid any risk of
tracing into user space.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit 49003a8d6b35e128ef5e51433e60e783a46fbe5f)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: Ifae7003018e4088d5de038cef25fa210211a75b6
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irq_stack is a per_cpu variable, that needs to be access from entry.S.
Use an assembler macro instead of the unreadable details.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit aa4d5d3cbc258c355151a3903211b27359390ec5)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I2ccc11f442c0303c62e1c3e0a05a088958c922b8
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Running with CONFIG_DEBUG_SPINLOCK=y can trigger a BUG with the new IRQ
stack code:
BUG: spinlock lockup suspected on CPU#1
This is due to the IRQ_STACK_TO_TASK_STACK macro incorrectly retrieving
the task stack pointer stashed at the top of the IRQ stack.
Sayeth James:
| Yup, this is what is happening. Its an off-by-one due to broken
| thinking about how the stack works. My broken thinking was:
|
| > top ------------
| > | dummy_lr | <- irq_stack_ptr
| > ------------
| > | x29 |
| > ------------
| > | x19 | <- irq_stack_ptr - 0x10
| > ------------
| > | xzr |
| > ------------
|
| But the stack-pointer is decreased before use. So it actually looks
| like this:
|
| > ------------
| > | | <- irq_stack_ptr
| > top ------------
| > | dummy_lr |
| > ------------
| > | x29 | <- irq_stack_ptr - 0x10
| > ------------
| > | x19 |
| > ------------
| > | xzr | <- irq_stack_ptr - 0x20
| > ------------
|
| The value being used as the original stack is x29, which in all the
| tests is sp but without the current frames data, hence there are no
| missing frames in the output.
|
| Jungseok Lee picked it up with a 32bit user space because aarch32
| can't use x29, so it remains 0 forever. The fix he posted is correct.
This patch fixes the macro and adds some of this wisdom to a comment,
so that the layout of the IRQ stack is well understood.
Cc: James Morse <james.morse@arm.com>
Reported-by: Jungseok Lee <jungseoklee85@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit 7596abf2e5661d52c4f414f37addeed54e098880)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: Ic65c0d0d90a30a5caf8b3791d1e856400bd2b5f5
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entry.S is modified to switch to the per_cpu irq_stack during el{0,1}_irq.
irq_count is used to detect recursive interrupts on the irq_stack, it is
updated late by do_softirq_own_stack(), when called on the irq_stack, before
__do_softirq() re-enables interrupts to process softirqs.
do_softirq_own_stack() is added by this patch, but does not yet switch
stack.
This patch adds the dummy stack frame and data needed by the previous
stack tracing patches.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit 8e23dacd12a48e58125b84c817da50850b73280a)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I9f79437af3da0398cb12e7afd1aa9f473f59b2e6
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There is need for figuring out how to manage struct thread_info data when
IRQ stack is introduced. struct thread_info information should be copied
to IRQ stack under the current thread_info calculation logic whenever
context switching is invoked. This is too expensive to keep supporting
the approach.
Instead, this patch pays attention to sp_el0 which is an unused scratch
register in EL1 context. sp_el0 utilization not only simplifies the
management, but also prevents text section size from being increased
largely due to static allocated IRQ stack as removing masking operation
using THREAD_SIZE in many places.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: per-cpu-irq-stack
(cherry picked from commit 6cdf9c7ca687e01840d0215437620a20263012fc)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I53c9f44a0772b8649f302a65a7a6519d8eebcb91
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When a kernel is built with CONFIG_TRACE_IRQFLAGS the following warning
is produced when entering userspace for the first time:
WARNING: at /work/Linux/linux-2.6-aarch64/kernel/locking/lockdep.c:3519
Modules linked in:
CPU: 1 PID: 1 Comm: systemd Not tainted 4.4.0-rc3+ #639
Hardware name: Juno (DT)
task: ffffffc9768a0000 ti: ffffffc9768a8000 task.ti: ffffffc9768a8000
PC is at check_flags.part.22+0x19c/0x1a8
LR is at check_flags.part.22+0x19c/0x1a8
pc : [<ffffffc0000fba6c>] lr : [<ffffffc0000fba6c>] pstate: 600001c5
sp : ffffffc9768abe10
x29: ffffffc9768abe10 x28: ffffffc9768a8000
x27: 0000000000000000 x26: 0000000000000001
x25: 00000000000000a6 x24: ffffffc00064be6c
x23: ffffffc0009f249e x22: ffffffc9768a0000
x21: ffffffc97fea5480 x20: 00000000000001c0
x19: ffffffc00169a000 x18: 0000005558cc7b58
x17: 0000007fb78e3180 x16: 0000005558d2e238
x15: ffffffffffffffff x14: 0ffffffffffffffd
x13: 0000000000000008 x12: 0101010101010101
x11: 7f7f7f7f7f7f7f7f x10: fefefefefefeff63
x9 : 7f7f7f7f7f7f7f7f x8 : 6e655f7371726964
x7 : 0000000000000001 x6 : ffffffc0001079c4
x5 : 0000000000000000 x4 : 0000000000000001
x3 : ffffffc001698438 x2 : 0000000000000000
x1 : ffffffc9768a0000 x0 : 000000000000002e
Call trace:
[<ffffffc0000fba6c>] check_flags.part.22+0x19c/0x1a8
[<ffffffc0000fc440>] lock_is_held+0x80/0x98
[<ffffffc00064bafc>] __schedule+0x404/0x730
[<ffffffc00064be6c>] schedule+0x44/0xb8
[<ffffffc000085bb0>] ret_to_user+0x0/0x24
possible reason: unannotated irqs-off.
irq event stamp: 502169
hardirqs last enabled at (502169): [<ffffffc000085a98>] el0_irq_naked+0x1c/0x24
hardirqs last disabled at (502167): [<ffffffc0000bb3bc>] __do_softirq+0x17c/0x298
softirqs last enabled at (502168): [<ffffffc0000bb43c>] __do_softirq+0x1fc/0x298
softirqs last disabled at (502143): [<ffffffc0000bb830>] irq_exit+0xa0/0xf0
This happens because we disable interrupts in ret_to_user before calling
schedule() in work_resched. This patch adds the necessary
trace_hardirqs_off annotation.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
(cherry picked from commit db3899a6477a4dccd26cbfb7f408b6be2cc068e0)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I868c6c64c548f12156467959e2b8df09caae282f
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Conflicts:
arch/arm/boot/dts/qcom/msm8996pro.dtsi
arch/arm64/kernel/Makefile
drivers/leds/leds-qpnp-flash.c
sound/soc/msm/apq8096-auto.c
Change-Id: Idea5d05fec354b8f38ea70643decb03f7b80ddb7
Signed-off-by: Arun KS <arunks@codeaurora.org>
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* refs/heads/tmp-26c8156:
Linux 4.4.49
drm/i915: fix use-after-free in page_flip_completed()
ALSA: seq: Don't handle loop timeout at snd_seq_pool_done()
ALSA: seq: Fix race at creating a queue
xen-netfront: Delete rx_refill_timer in xennet_disconnect_backend()
scsi: mpt3sas: disable ASPM for MPI2 controllers
scsi: aacraid: Fix INTx/MSI-x issue with older controllers
scsi: zfcp: fix use-after-free by not tracing WKA port open/close on failed send
netvsc: Set maximum GSO size in the right place
mac80211: Fix adding of mesh vendor IEs
ARM: 8642/1: LPAE: catch pending imprecise abort on unmask
target: Fix COMPARE_AND_WRITE ref leak for non GOOD status
target: Fix early transport_generic_handle_tmr abort scenario
target: Use correct SCSI status during EXTENDED_COPY exception
target: Don't BUG_ON during NodeACL dynamic -> explicit conversion
ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
hns: avoid stack overflow with CONFIG_KASAN
cpumask: use nr_cpumask_bits for parsing functions
Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback"
selinux: fix off-by-one in setprocattr
ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup
Linux 4.4.48
base/memory, hotplug: fix a kernel oops in show_valid_zones()
x86/irq: Make irq activate operations symmetric
USB: serial: option: add device ID for HP lt2523 (Novatel E371)
usb: gadget: f_fs: Assorted buffer overflow checks.
USB: Add quirk for WORLDE easykey.25 MIDI keyboard
USB: serial: pl2303: add ATEN device ID
USB: serial: qcserial: add Dell DW5570 QDL
KVM: x86: do not save guest-unsupported XSAVE state
HID: wacom: Fix poor prox handling in 'wacom_pl_irq'
percpu-refcount: fix reference leak during percpu-atomic transition
mmc: sdhci: Ignore unexpected CARD_INT interrupts
can: bcm: fix hrtimer/tasklet termination in bcm op removal
mm, fs: check for fatal signals in do_generic_file_read()
mm/memory_hotplug.c: check start_pfn in test_pages_in_a_zone()
cifs: initialize file_info_lock
zswap: disable changing params if init fails
svcrpc: fix oops in absence of krb5 module
NFSD: Fix a null reference case in find_or_create_lock_stateid()
powerpc: Add missing error check to prom_find_boot_cpu()
powerpc/eeh: Fix wrong flag passed to eeh_unfreeze_pe()
libata: apply MAX_SEC_1024 to all CX1-JB*-HP devices
ata: sata_mv:- Handle return value of devm_ioremap.
perf/core: Fix PERF_RECORD_MMAP2 prot/flags for anonymous memory
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
crypto: api - Clear CRYPTO_ALG_DEAD bit before registering an alg
drm/nouveau/nv1a,nv1f/disp: fix memory clock rate retrieval
drm/nouveau/disp/gt215: Fix HDA ELD handling (thus, HDMI audio) on gt215
ext4: validate s_first_meta_bg at mount time
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
ANDROID: security: export security_path_chown()
Linux 4.4.47
net: dsa: Bring back device detaching in dsa_slave_suspend()
qmi_wwan/cdc_ether: add device ID for HP lt2523 (Novatel E371) WWAN card
af_unix: move unix_mknod() out of bindlock
r8152: don't execute runtime suspend if the tx is not empty
bridge: netlink: call br_changelink() during br_dev_newlink()
tcp: initialize max window for a new fastopen socket
ipv6: addrconf: Avoid addrconf_disable_change() using RCU read-side lock
net: phy: bcm63xx: Utilize correct config_intr function
net: fix harmonize_features() vs NETIF_F_HIGHDMA
ax25: Fix segfault after sock connection timeout
ravb: do not use zero-length alignment DMA descriptor
openvswitch: maintain correct checksum state in conntrack actions
tcp: fix tcp_fastopen unaligned access complaints on sparc
net: systemport: Decouple flow control from __bcm_sysport_tx_reclaim
net: ipv4: fix table id in getroute response
net: lwtunnel: Handle lwtunnel_fill_encap failure
mlxsw: pci: Fix EQE structure definition
mlxsw: switchx2: Fix memory leak at skb reallocation
mlxsw: spectrum: Fix memory leak at skb reallocation
r8152: fix the sw rx checksum is unavailable
ANDROID: sdcardfs: Switch strcasecmp for internal call
ANDROID: sdcardfs: switch to full_name_hash and qstr
ANDROID: sdcardfs: Add GID Derivation to sdcardfs
ANDROID: sdcardfs: Remove redundant operation
ANDROID: sdcardfs: add support for user permission isolation
ANDROID: sdcardfs: Refactor configfs interface
ANDROID: sdcardfs: Allow non-owners to touch
ANDROID: binder: fix format specifier for type binder_size_t
ANDROID: fs: Export vfs_rmdir2
ANDROID: fs: Export free_fs_struct and set_fs_pwd
ANDROID: mnt: remount should propagate to slaves of slaves
ANDROID: sdcardfs: Switch ->d_inode to d_inode()
ANDROID: sdcardfs: Fix locking issue with permision fix up
ANDROID: sdcardfs: Change magic value
ANDROID: sdcardfs: Use per mount permissions
ANDROID: sdcardfs: Add gid and mask to private mount data
ANDROID: sdcardfs: User new permission2 functions
ANDROID: vfs: Add setattr2 for filesystems with per mount permissions
ANDROID: vfs: Add permission2 for filesystems with per mount permissions
ANDROID: vfs: Allow filesystems to access their private mount data
ANDROID: mnt: Add filesystem private data to mount points
ANDROID: sdcardfs: Move directory unlock before touch
ANDROID: sdcardfs: fix external storage exporting incorrect uid
ANDROID: sdcardfs: Added top to sdcardfs_inode_info
ANDROID: sdcardfs: Switch package list to RCU
ANDROID: sdcardfs: Fix locking for permission fix up
ANDROID: sdcardfs: Check for other cases on path lookup
ANDROID: sdcardfs: override umask on mkdir and create
Linux 4.4.46
mm, memcg: do not retry precharge charges
platform/x86: intel_mid_powerbtn: Set IRQ_ONESHOT
pinctrl: broxton: Use correct PADCFGLOCK offset
s5k4ecgx: select CRC32 helper
IB/umem: Release pid in error and ODP flow
IB/ipoib: move back IB LL address into the hard header
drm/i915: Don't leak edid in intel_crt_detect_ddc()
SUNRPC: cleanup ida information when removing sunrpc module
NFSv4.0: always send mode in SETATTR after EXCLUSIVE4
nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header
ARC: [arcompact] handle unaligned access delay slot corner case
ARC: udelay: fix inline assembler by adding LP_COUNT to clobber list
can: ti_hecc: add missing prepare and unprepare of the clock
can: c_can_pci: fix null-pointer-deref in c_can_start() - set device pointer
s390/ptrace: Preserve previous registers for short regset write
RDMA/cma: Fix unknown symbol when CONFIG_IPV6 is not enabled
ISDN: eicon: silence misleading array-bounds warning
sysctl: fix proc_doulongvec_ms_jiffies_minmax()
mm/mempolicy.c: do not put mempolicy before using its nodemask
drm: Fix broken VT switch with video=1366x768 option
tile/ptrace: Preserve previous registers for short regset write
fbdev: color map copying bounds checking
Linux 4.4.45
arm64: avoid returning from bad_mode
selftest/powerpc: Wrong PMC initialized in pmc56_overflow test
dmaengine: pl330: Fix runtime PM support for terminated transfers
ite-cir: initialize use_demodulator before using it
blackfin: check devm_pinctrl_get() for errors
ARM: 8613/1: Fix the uaccess crash on PB11MPCore
ARM: ux500: fix prcmu_is_cpu_in_wfi() calculation
ARM: dts: imx6qdl-nitrogen6_max: fix sgtl5000 pinctrl init
arm64/ptrace: Reject attempts to set incomplete hardware breakpoint fields
arm64/ptrace: Avoid uninitialised struct padding in fpr_set()
arm64/ptrace: Preserve previous registers for short regset write - 3
arm64/ptrace: Preserve previous registers for short regset write - 2
arm64/ptrace: Preserve previous registers for short regset write
ARM: dts: da850-evm: fix read access to SPI flash
ceph: fix bad endianness handling in parse_reply_info_extra
ARM: 8634/1: hw_breakpoint: blacklist Scorpion CPUs
svcrdma: avoid duplicate dma unmapping during error recovery
clocksource/exynos_mct: Clear interrupt when cpu is shut down
ubifs: Fix journal replay wrt. xattr nodes
qla2xxx: Fix crash due to null pointer access
x86/ioapic: Restore IO-APIC irq_chip retrigger callback
mtd: nand: xway: disable module support
ieee802154: atusb: do not use the stack for buffers to make them DMA able
mmc: mxs-mmc: Fix additional cycles after transmission stop
HID: corsair: fix control-transfer error handling
HID: corsair: fix DMA buffers on stack
PCI: Enumerate switches below PCI-to-PCIe bridges
fuse: clear FR_PENDING flag when moving requests out of pending queue
svcrpc: don't leak contexts on PROC_DESTROY
x86/PCI: Ignore _CRS on Supermicro X8DTH-i/6/iF/6F
tmpfs: clear S_ISGID when setting posix ACLs
ARM: dts: imx31: fix AVIC base address
ARM: dts: imx31: move CCM device node to AIPS2 bus devices
ARM: dts: imx31: fix clock control module interrupts description
perf scripting: Avoid leaking the scripting_context variable
IB/IPoIB: Remove can't use GFP_NOIO warning
IB/mlx4: When no DMFS for IPoIB, don't allow NET_IF QPs
IB/mlx4: Fix port query for 56Gb Ethernet links
IB/mlx4: Fix out-of-range array index in destroy qp flow
IB/mlx4: Set traffic class in AH
IB/mlx5: Wait for all async command completions to complete
ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it
Linux 4.4.44
pinctrl: sh-pfc: Do not unconditionally support PIN_CONFIG_BIAS_DISABLE
powerpc/ibmebus: Fix device reference leaks in sysfs interface
powerpc/ibmebus: Fix further device reference leaks
bus: vexpress-config: fix device reference leak
blk-mq: Always schedule hctx->next_cpu
ACPI / APEI: Fix NMI notification handling
block: cfq_cpd_alloc() should use @gfp
cpufreq: powernv: Disable preemption while checking CPU throttling state
NFSv4.1: nfs4_fl_prepare_ds must be careful about reporting success.
NFS: Fix a performance regression in readdir
pNFS: Fix race in pnfs_wait_on_layoutreturn
pinctrl: meson: fix gpio request disabling other modes
btrfs: fix error handling when run_delayed_extent_op fails
btrfs: fix locking when we put back a delayed ref that's too new
x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option
USB: serial: ch341: fix modem-control and B0 handling
USB: serial: ch341: fix resume after reset
drm/radeon: drop verde dpm quirks
sysctl: Drop reference added by grab_header in proc_sys_readdir
sysrq: attach sysrq handler correctly for 32-bit kernel
tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx
mnt: Protect the mountpoint hashtable with mount_lock
vme: Fix wrong pointer utilization in ca91cx42_slave_get
xhci: fix deadlock at host remove by running watchdog correctly
i2c: fix kernel memory disclosure in dev interface
i2c: print correct device invalid address
Input: elants_i2c - avoid divide by 0 errors on bad touchscreen data
USB: serial: ch341: fix open and resume after B0
USB: serial: ch341: fix control-message error handling
USB: serial: ch341: fix open error handling
USB: serial: ch341: fix initial modem-control state
USB: serial: kl5kusb105: fix line-state error handling
nl80211: fix sched scan netlink socket owner destruction
KVM: x86: Introduce segmented_write_std
KVM: x86: emulate FXSAVE and FXRSTOR
KVM: x86: add asm_safe wrapper
KVM: x86: add Align16 instruction flag
KVM: x86: flush pending lapic jump label updates on module unload
jump_labels: API for flushing deferred jump label updates
KVM: eventfd: fix NULL deref irqbypass consumer
KVM: x86: fix emulation of "MOV SS, null selector"
mm/hugetlb.c: fix reservation race when freeing surplus pages
ocfs2: fix crash caused by stale lvb with fsdlm plugin
mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
selftests: do not require bash for the generated test
selftests: do not require bash to run netsocktests testcase
Input: i8042 - add Pegatron touchpad to noloop table
Input: xpad - use correct product id for x360w controllers
DEBUG: sched/fair: Fix sched_load_avg_cpu events for task_groups
DEBUG: sched/fair: Fix missing sched_load_avg_cpu events
net: socket: don't set sk_uid to garbage value in ->setattr()
ANDROID: configs: CONFIG_ARM64_SW_TTBR0_PAN=y
UPSTREAM: arm64: Disable PAN on uaccess_enable()
UPSTREAM: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN
UPSTREAM: arm64: xen: Enable user access before a privcmd hvc call
UPSTREAM: arm64: Handle faults caused by inadvertent user access with PAN enabled
BACKPORT: arm64: Disable TTBR0_EL1 during normal kernel execution
BACKPORT: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1
BACKPORT: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro
BACKPORT: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros
UPSTREAM: arm64: alternative: add auto-nop infrastructure
UPSTREAM: arm64: barriers: introduce nops and __nops macros for NOP sequences
Revert "FROMLIST: arm64: Factor out PAN enabling/disabling into separate uaccess_* macros"
Revert "FROMLIST: arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro"
Revert "FROMLIST: arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1"
Revert "FROMLIST: arm64: Disable TTBR0_EL1 during normal kernel execution"
Revert "FROMLIST: arm64: Handle faults caused by inadvertent user access with PAN enabled"
Revert "FROMLIST: arm64: xen: Enable user access before a privcmd hvc call"
Revert "FROMLIST: arm64: Enable CONFIG_ARM64_SW_TTBR0_PAN"
ANDROID: sched/walt: fix build failure if FAIR_GROUP_SCHED=n
Linux 4.4.43
mm/init: fix zone boundary creation
ALSA: usb-audio: Add a quirk for Plantronics BT600
spi: mvebu: fix baudrate calculation for armada variant
ARM: OMAP4+: Fix bad fallthrough for cpuidle
ARM: zynq: Reserve correct amount of non-DMA RAM
powerpc: Fix build warning on 32-bit PPC
ALSA: firewire-tascam: Fix to handle error from initialization of stream data
HID: hid-cypress: validate length of report
net: vrf: do not allow table id 0
net: ipv4: Fix multipath selection with vrf
gro: Disable frag0 optimization on IPv6 ext headers
gro: use min_t() in skb_gro_reset_offset()
gro: Enter slow-path if there is no tailroom
r8152: fix rx issue for runtime suspend
r8152: split rtl8152_suspend function
ipv4: Do not allow MAIN to be alias for new LOCAL w/ custom rules
igmp: Make igmp group member RFC 3376 compliant
drop_monitor: consider inserted data in genlmsg_end
drop_monitor: add missing call to genlmsg_end
net/mlx5: Avoid shadowing numa_node
net/mlx5: Check FW limitations on log_max_qp before setting it
net: stmmac: Fix race between stmmac_drv_probe and stmmac_open
net, sched: fix soft lockup in tc_classify
ipv6: handle -EFAULT from skb_copy_bits
net: vrf: Drop conntrack data after pass through VRF device on Tx
ser_gigaset: return -ENOMEM on error instead of success
netvsc: reduce maximum GSO size
Linux 4.4.42
usb: gadget: composite: always set ep->mult to a sensible value
Revert "usb: gadget: composite: always set ep->mult to a sensible value"
tick/broadcast: Prevent NULL pointer dereference
drm/radeon: Always store CRTC relative radeon_crtc->cursor_x/y values
cx23885-dvb: move initialization of a8293_pdata
net: vxge: avoid unused function warnings
net: ti: cpmac: Fix compiler warning due to type confusion
cred/userns: define current_user_ns() as a function
staging: comedi: dt282x: tidy up register bit defines
powerpc/pci/rpadlpar: Fix device reference leaks
md: MD_RECOVERY_NEEDED is set for mddev->recovery
crypto: arm64/aes-ce - fix for big endian
crypto: arm64/aes-xts-ce: fix for big endian
crypto: arm64/sha1-ce - fix for big endian
crypto: arm64/aes-neon - fix for big endian
crypto: arm64/aes-ccm-ce: fix for big endian
crypto: arm/aes-ce - fix for big endian
crypto: arm64/ghash-ce - fix for big endian
crypto: arm64/sha2-ce - fix for big endian
s390/crypto: unlock on error in prng_tdes_read()
mmc: mmc_test: Uninitialized return value
PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend
irqchip/bcm7038-l1: Implement irq_cpu_offline() callback
target/iscsi: Fix double free in lio_target_tiqn_addtpg()
scsi: mvsas: fix command_active typo
ASoC: samsung: i2s: Fixup last IRQ unsafe spin lock call
iommu/vt-d: Flush old iommu caches for kdump when the device gets context mapped
iommu/vt-d: Fix pasid table size encoding
iommu/amd: Fix the left value check of cmd buffer
iommu/amd: Missing error code in amd_iommu_init_device()
clk: imx31: fix rewritten input argument of mx31_clocks_init()
clk: clk-wm831x: fix a logic error
hwmon: (g762) Fix overflows and crash seen when writing limit attributes
hwmon: (nct7802) Fix overflows seen when writing into limit attributes
hwmon: (ds620) Fix overflows seen when writing temperature limits
hwmon: (amc6821) sign extension temperature
hwmon: (scpi) Fix module autoload
cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected
ath10k: use the right length of "background"
stable-fixup: hotplug: fix unused function warning
usb: dwc3: ep0: explicitly call dwc3_ep0_prepare_one_trb()
usb: dwc3: ep0: add dwc3_ep0_prepare_one_trb()
usb: dwc3: gadget: always unmap EP0 requests
staging: iio: ad7606: fix improper setting of oversampling pins
mei: bus: fix mei_cldev_enable KDoc
USB: serial: io_ti: bind to interface after fw download
USB: phy: am335x-control: fix device and of_node leaks
ARM: dts: r8a7794: Correct hsusb parent clock
USB: serial: kl5kusb105: abort on open exception path
ALSA: usb-audio: Fix bogus error return in snd_usb_create_stream()
usb: musb: blackfin: add bfin_fifo_offset in bfin_ops
usb: hub: Move hub_port_disable() to fix warning if PM is disabled
usb: musb: Fix trying to free already-free IRQ 4
usb: dwc3: pci: add Intel Gemini Lake PCI ID
xhci: Fix race related to abort operation
xhci: Use delayed_work instead of timer for command timeout
usb: xhci-mem: use passed in GFP flags instead of GFP_KERNEL
USB: serial: mos7720: fix parallel probe
USB: serial: mos7720: fix parport use-after-free on probe errors
USB: serial: mos7720: fix use-after-free on probe errors
USB: serial: mos7720: fix NULL-deref at open
USB: serial: mos7840: fix NULL-deref at open
USB: serial: kobil_sct: fix NULL-deref in write
USB: serial: cyberjack: fix NULL-deref at open
USB: serial: oti6858: fix NULL-deref at open
USB: serial: io_edgeport: fix NULL-deref at open
USB: serial: ti_usb_3410_5052: fix NULL-deref at open
USB: serial: garmin_gps: fix memory leak on failed URB submit
USB: serial: iuu_phoenix: fix NULL-deref at open
USB: serial: io_ti: fix I/O after disconnect
USB: serial: io_ti: fix another NULL-deref at open
USB: serial: io_ti: fix NULL-deref at open
USB: serial: spcp8x5: fix NULL-deref at open
USB: serial: keyspan_pda: verify endpoints at probe
USB: serial: pl2303: fix NULL-deref at open
USB: serial: quatech2: fix sleep-while-atomic in close
USB: serial: omninet: fix NULL-derefs at open and disconnect
usb: xhci: hold lock over xhci_abort_cmd_ring()
xhci: Handle command completion and timeout race
usb: host: xhci: Fix possible wild pointer when handling abort command
usb: xhci: fix return value of xhci_setup_device()
xhci: free xhci virtual devices with leaf nodes first
usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Apollo Lake
xhci: workaround for hosts missing CAS bit
usb: xhci: fix possible wild pointer
usb: dwc3: core: avoid Overflow events
usb: gadget: composite: Test get_alt() presence instead of set_alt()
USB: dummy-hcd: fix bug in stop_activity (handle ep0)
USB: fix problems with duplicate endpoint addresses
USB: gadgetfs: fix checks of wTotalLength in config descriptors
USB: gadgetfs: fix use-after-free bug
USB: gadgetfs: fix unbounded memory allocation bug
usb: gadgetfs: restrict upper bound on device configuration size
usb: storage: unusual_uas: Add JMicron JMS56x to unusual device
usb: musb: dsps: implement clear_ep_rxintr() callback
usb: musb: core: add clear_ep_rxintr() to musb_platform_ops
KVM: MIPS: Flush KVM entry code from icache globally
KVM: x86: reset MMU on KVM_SET_VCPU_EVENTS
mac80211: initialize fast-xmit 'info' later
ARM: davinci: da850: don't add emac clock to lookup table twice
ALSA: usb-audio: Fix irq/process data synchronization
ALSA: hda - Apply asus-mode8 fixup to ASUS X71SL
ALSA: hda - Fix up GPIO for ASUS ROG Ranger
Linux 4.4.41
net: mvpp2: fix dma unmapping of TX buffers for fragments
sg_write()/bsg_write() is not fit to be called under KERNEL_DS
kconfig/nconf: Fix hang when editing symbol with a long prompt
target/user: Fix use-after-free of tcmu_cmds if they are expired
powerpc: Convert cmp to cmpd in idle enter sequence
powerpc/ps3: Fix system hang with GCC 5 builds
nfs_write_end(): fix handling of short copies
libceph: verify authorize reply on connect
PCI: Check for PME in targeted sleep state
Input: drv260x - fix input device's parent assignment
media: solo6x10: fix lockup by avoiding delayed register write
IB/cma: Fix a race condition in iboe_addr_get_sgid()
IB/multicast: Check ib_find_pkey() return value
IPoIB: Avoid reading an uninitialized member variable
IB/mad: Fix an array index check
fgraph: Handle a case where a tracer ignores set_graph_notrace
platform/x86: asus-nb-wmi.c: Add X45U quirk
ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it
kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)
KVM: PPC: Book3S HV: Don't lose hardware R/C bit updates in H_PROTECT
KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state
md/raid5: limit request size according to implementation limits
sc16is7xx: Drop bogus use of IRQF_ONESHOT
s390/vmlogrdr: fix IUCV buffer allocation
firmware: fix usermode helper fallback loading
ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache
scsi: avoid a permanent stop of the scsi device's request queue
scsi: zfcp: fix rport unblock race with LUN recovery
scsi: zfcp: do not trace pure benign residual HBA responses at default level
scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
scsi: megaraid_sas: Do not set MPI2_TYPE_CUDA for JBOD FP path for FW which does not support JBOD sequence map
scsi: megaraid_sas: For SRIOV enabled firmware, ensure VF driver waits for 30secs before reset
vt: fix Scroll Lock LED trigger name
block: protect iterate_bdevs() against concurrent close
mei: request async autosuspend at the end of enumeration
drivers/gpu/drm/ast: Fix infinite loop if read fails
drm/gma500: Add compat ioctl
drm/radeon: add additional pci revision to dpm workaround
drm/radeon: Hide the HW cursor while it's out of bounds
drm/radeon: Also call cursor_move_locked when the cursor size changes
drm/nouveau/i2c/gk110b,gm10x: use the correct implementation
drm/nouveau/fifo/gf100-: protect channel preempt with subdev mutex
drm/nouveau/ltc: protect clearing of comptags with mutex
drm/nouveau/bios: require checksum to match for fast acpi shadow method
drm/nouveau/kms: lvds panel strap moved again on maxwell
ACPI / video: Add force_native quirk for HP Pavilion dv6
ACPI / video: Add force_native quirk for Dell XPS 17 L702X
staging: comedi: ni_mio_common: fix E series ni_ai_insn_read() data
staging: comedi: ni_mio_common: fix M Series ni_ai_insn_read() data mask
thermal: hwmon: Properly report critical temperature in sysfs
clk: bcm2835: Avoid overwriting the div info when disabling a pll_div clk
timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion
regulator: stw481x-vmmc: fix ages old enable error
mmc: sdhci: Fix recovery from tuning timeout
ath9k: Really fix LED polarity for some Mini PCI AR9220 MB92 cards.
cfg80211/mac80211: fix BSS leaks when abandoning assoc attempts
rtlwifi: Fix enter/exit power_save
ssb: Fix error routine when fallback SPROM fails
Linux 4.4.40
ppp: defer netns reference release for ppp channel
driver core: fix race between creating/querying glue dir and its cleanup
xfs: set AGI buffer type in xlog_recover_clear_agi_bucket
arm/xen: Use alloc_percpu rather than __alloc_percpu
xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
tpm xen: Remove bogus tpm_chip_unregister
kernel/debug/debug_core.c: more properly delay for secondary CPUs
kernel/watchdog: use nmi registers snapshot in hardlockup handler
CIFS: Fix a possible memory corruption in push locks
CIFS: Fix missing nls unload in smb2_reconnect()
CIFS: Fix a possible memory corruption during reconnect
ASoC: intel: Fix crash at suspend/resume without card registration
dm space map metadata: fix 'struct sm_metadata' leak on failed create
dm crypt: mark key as invalid until properly loaded
dm flakey: return -EINVAL on interval bounds error in flakey_ctr()
blk-mq: Do not invoke .queue_rq() for a stopped queue
usb: gadget: composite: always set ep->mult to a sensible value
exec: Ensure mm->user_ns contains the execed files
fs: exec: apply CLOEXEC before changing dumpable task flags
mm/vmscan.c: set correct defer count for shrinker
loop: return proper error from loop_queue_rq()
f2fs: set ->owner for debugfs status file's file_operations
ext4: do not perform data journaling when data is encrypted
ext4: return -ENOMEM instead of success
ext4: reject inodes with negative size
ext4: add sanity checking to count_overhead()
ext4: fix in-superblock mount options processing
ext4: use more strict checks for inodes_per_block on mount
ext4: fix stack memory corruption with 64k block size
ext4: fix mballoc breakage with 64k block size
crypto: caam - fix AEAD givenc descriptors
ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
block_dev: don't test bdev->bd_contains when it is not stable
btrfs: make file clone aware of fatal signals
Btrfs: don't BUG() during drop snapshot
Btrfs: fix memory leak in do_walk_down
Btrfs: don't leak reloc root nodes on error
Btrfs: return gracefully from balance if fs tree is corrupted
Btrfs: bail out if block group has different mixed flag
Btrfs: fix memory leak in reading btree blocks
clk: ti: omap36xx: Work around sprz319 advisory 2.1
ALSA: hda: when comparing pin configurations, ignore assoc in addition to seq
ALSA: hda - Gate the mic jack on HP Z1 Gen3 AiO
ALSA: hda - fix headset-mic problem on a Dell laptop
ALSA: hda - ignore the assoc and seq when comparing pin configurations
ALSA: hda/ca0132 - Add quirk for Alienware 15 R2 2016
ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
ALSA: usb-audio: Add QuickCam Communicate Deluxe/S7500 to volume_control_quirks
USB: UHCI: report non-PME wakeup signalling for Intel hardware
usb: gadget: composite: correctly initialize ep->maxpacket
usb: gadget: f_uac2: fix error handling at afunc_bind
usb: hub: Fix auto-remount of safely removed or ejected USB-3 devices
USB: cdc-acm: add device id for GW Instek AFG-125
USB: serial: kl5kusb105: fix open error path
USB: serial: option: add dlink dwm-158
USB: serial: option: add support for Telit LE922A PIDs 0x1040, 0x1041
Btrfs: fix qgroup rescan worker initialization
btrfs: store and load values of stripes_min/stripes_max in balance status item
Btrfs: fix tree search logic when replaying directory entry deletes
btrfs: limit async_work allocation and worker func duration
ANDROID: trace: net: use %pK for kernel pointers
ANDROID: android-base: Enable QUOTA related configs
net: ipv4: Don't crash if passing a null sk to ip_rt_update_pmtu.
net: inet: Support UID-based routing in IP protocols.
Revert "net: ipv6: fix virtual tunneling build"
net: core: add UID to flows, rules, and routes
net: core: Add a UID field to struct sock.
Revert "net: core: Support UID-based routing."
Revert "net: core: Handle 'sk' being NULL in UID-based routing"
Revert "ANDROID: net: fix 'const' warnings"
Revert "ANDROID: net: fib: remove duplicate assignment"
Revert "ANDROID: net: core: fix UID-based routing"
UPSTREAM: efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping
UPSTREAM: arm64: enable CONFIG_DEBUG_RODATA by default
goldfish: enable CONFIG_INET_DIAG_DESTROY
sched/walt: kill {min,max}_capacity
sched: fix wrong truncation of walt_avg
ANDROID: dm verity: add minimum prefetch size
Linux 4.4.39
crypto: rsa - Add Makefile dependencies to fix parallel builds
hotplug: Make register and unregister notifier API symmetric
batman-adv: Check for alloc errors when preparing TT local data
m68k: Fix ndelay() macro
arm64: futex.h: Add missing PAN toggling
can: peak: fix bad memory access and free sequence
can: raw: raw_setsockopt: limit number of can_filter that can be set
crypto: mcryptd - Check mcryptd algorithm compatibility
perf/x86: Fix full width counter, counter overflow
locking/rtmutex: Use READ_ONCE() in rt_mutex_owner()
locking/rtmutex: Prevent dequeue vs. unlock race
zram: restrict add/remove attributes to root only
parisc: Fix TLB related boot crash on SMP machines
parisc: Remove unnecessary TLB purges from flush_dcache_page_asm and flush_icache_page_asm
parisc: Purge TLB before setting PTE
powerpc/eeh: Fix deadlock when PE frozen state can't be cleared
Conflicts:
arch/arm64/kernel/traps.c
drivers/usb/dwc3/core.h
drivers/usb/dwc3/ep0.c
drivers/usb/gadget/function/f_fs.c
drivers/usb/host/xhci-mem.c
drivers/usb/host/xhci-ring.c
drivers/usb/host/xhci.c
drivers/video/fbdev/core/fbcmap.c
include/trace/events/sched.h
mm/vmscan.c
Change-Id: I3faa0010ecb98972cd8e6470377a493b56d95f89
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>
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This is the 4.4.46 stable release
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commit 7d9e8f71b989230bc613d121ca38507d34ada849 upstream.
Generally, taking an unexpected exception should be a fatal event, and
bad_mode is intended to cater for this. However, it should be possible
to contain unexpected synchronous exceptions from EL0 without bringing
the kernel down, by sending a SIGILL to the task.
We tried to apply this approach in commit 9955ac47f4ba1c95 ("arm64:
don't kill the kernel on a bad esr from el0"), by sending a signal for
any bad_mode call resulting from an EL0 exception.
However, this also applies to other unexpected exceptions, such as
SError and FIQ. The entry paths for these exceptions branch to bad_mode
without configuring the link register, and have no kernel_exit. Thus, if
we take one of these exceptions from EL0, bad_mode will eventually
return to the original user link register value.
This patch fixes this by introducing a new bad_el0_sync handler to cater
for the recoverable case, and restoring bad_mode to its original state,
whereby it calls panic() and never returns. The recoverable case
branches to bad_el0_sync with a bl, and returns to userspace via the
usual ret_to_user mechanism.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Fixes: 9955ac47f4ba1c95 ("arm64: don't kill the kernel on a bad esr from el0")
Reported-by: Mark Salter <msalter@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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