| Commit message (Collapse) | Author | Age |
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commit 1bd6a1c4b80a28d975287630644e6b47d0f977a5 upstream.
Crash memory ranges is an array of memory ranges of the crashing kernel
to be exported as a dump via /proc/vmcore file. The size of the array
is set based on INIT_MEMBLOCK_REGIONS, which works alright in most cases
where memblock memory regions count is less than INIT_MEMBLOCK_REGIONS
value. But this count can grow beyond INIT_MEMBLOCK_REGIONS value since
commit 142b45a72e22 ("memblock: Add array resizing support").
On large memory systems with a few DLPAR operations, the memblock memory
regions count could be larger than INIT_MEMBLOCK_REGIONS value. On such
systems, registering fadump results in crash or other system failures
like below:
task: c00007f39a290010 ti: c00000000b738000 task.ti: c00000000b738000
NIP: c000000000047df4 LR: c0000000000f9e58 CTR: c00000000010f180
REGS: c00000000b73b570 TRAP: 0300 Tainted: G L X (4.4.140+)
MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 22004484 XER: 20000000
CFAR: c000000000008500 DAR: 000007a450000000 DSISR: 40000000 SOFTE: 0
...
NIP [c000000000047df4] smp_send_reschedule+0x24/0x80
LR [c0000000000f9e58] resched_curr+0x138/0x160
Call Trace:
resched_curr+0x138/0x160 (unreliable)
check_preempt_curr+0xc8/0xf0
ttwu_do_wakeup+0x38/0x150
try_to_wake_up+0x224/0x4d0
__wake_up_common+0x94/0x100
ep_poll_callback+0xac/0x1c0
__wake_up_common+0x94/0x100
__wake_up_sync_key+0x70/0xa0
sock_def_readable+0x58/0xa0
unix_stream_sendmsg+0x2dc/0x4c0
sock_sendmsg+0x68/0xa0
___sys_sendmsg+0x2cc/0x2e0
__sys_sendmsg+0x5c/0xc0
SyS_socketcall+0x36c/0x3f0
system_call+0x3c/0x100
as array index overflow is not checked for while setting up crash memory
ranges causing memory corruption. To resolve this issue, dynamically
allocate memory for crash memory ranges and resize it incrementally,
in units of pagesize, on hitting array size limit.
Fixes: 2df173d9e85d ("fadump: Initialize elfcore header and add PT_LOAD program headers.")
Cc: stable@vger.kernel.org # v3.4+
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
[mpe: Just use PAGE_SIZE directly, fixup variable placement]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit dbb236c1ceb697a559e0694ac4c9e7b9131d0b16 upstream.
Recently vDSO support for CLOCK_MONOTONIC_RAW was added in
49eea433b326 ("arm64: Add support for CLOCK_MONOTONIC_RAW in
clock_gettime() vDSO"). Noticing that the core timekeeping code
never set tkr_raw.xtime_nsec, the vDSO implementation didn't
bother exposing it via the data page and instead took the
unshifted tk->raw_time.tv_nsec value which was then immediately
shifted left in the vDSO code.
Unfortunately, by accellerating the MONOTONIC_RAW clockid, it
uncovered potential 1ns time inconsistencies caused by the
timekeeping core not handing sub-ns resolution.
Now that the core code has been fixed and is actually setting
tkr_raw.xtime_nsec, we need to take that into account in the
vDSO by adding it to the shifted raw_time value, in order to
fix the user-visible inconsistency. Rather than do that at each
use (and expand the data page in the process), instead perform
the shift/addition operation when populating the data page and
remove the shift from the vDSO code entirely.
[jstultz: minor whitespace tweak, tried to improve commit
message to make it more clear this fixes a regression]
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Tested-by: Daniel Mentz <danielmentz@google.com>
Acked-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Link: http://lkml.kernel.org/r/1496965462-20003-4-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I51b5ebd994635eb091ad6a084ddfa12074f27d81
Tested-by: Freddy Hsin <freddy.hsin@mediatek.com>
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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android-4.4 contains an out-of-tree backport of 68709f45385a ("arm64:
only consider memblocks with NOMAP cleared for linear mapping"), so it
should use the 4.9.y implementation of pfn_valid() that calls
memblock_is_map_memory().
Change-Id: Id1d67813ee2a0a85ec69ef255daa27c4f6286800
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
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* refs/heads/tmp-d762e28
Linux 4.4.154
cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status
iscsi target: fix session creation failure handling
scsi: core: Avoid that SCSI device removal through sysfs triggers a deadlock
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
MIPS: lib: Provide MIPS64r6 __multi3() for GCC < 7
MIPS: Correct the 64-bit DSP accumulator register size
kprobes: Make list and blacklist root user read only
s390/pci: fix out of bounds access during irq setup
s390/qdio: reset old sbal_state flags
s390: fix br_r1_trampoline for machines without exrl
x86/spectre: Add missing family 6 check to microcode check
x86/irqflags: Mark native_restore_fl extern inline
pinctrl: freescale: off by one in imx1_pinconf_group_dbg_show()
ASoC: sirf: Fix potential NULL pointer dereference
ASoC: dpcm: don't merge format from invalid codec dai
udl-kms: fix crash due to uninitialized memory
udl-kms: handle allocation failure
udl-kms: change down_interruptible to down
fuse: Add missed unlock_page() to fuse_readpages_fill()
fuse: Fix oops at process_init_reply()
fuse: umount should wait for all requests
fuse: fix unlocked access to processing queue
fuse: fix double request_end()
fuse: Don't access pipe->buffers without pipe_lock()
x86/process: Re-export start_thread()
x86/speculation/l1tf: Suggest what to do on systems with too much RAM
x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM
x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit
KVM: arm/arm64: Skip updating PMD entry if no change
KVM: arm/arm64: Skip updating PTE entry if no change
arm64: mm: check for upper PAGE_SHIFT bits in pfn_valid()
ext4: reset error code in ext4_find_entry in fallback
ext4: sysfs: print ext4_super_block fields as little-endian
ext4: check for NUL characters in extended attribute's name
s390/kvm: fix deadlock when killed by oom
btrfs: don't leak ret from do_chunk_alloc
smb3: don't request leases in symlink creation and query
smb3: Do not send SMB3 SET_INFO if nothing changed
cifs: check kmalloc before use
cifs: add missing debug entries for kconfig options
mm/memory.c: check return value of ioremap_prot
scsi: vmw_pvscsi: Return DID_RESET for status SAM_STAT_COMMAND_TERMINATED
scsi: fcoe: drop frames in ELS LOGO error path
drivers: net: lmc: fix case value for target abort error
arc: fix type warnings in arc/mm/cache.c
arc: fix build errors in arc/include/asm/delay.h
enic: handle mtu change for vf properly
Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum"
tools/power turbostat: Read extended processor family from CPUID
zswap: re-check zswap_is_full() after do zswap_shrink()
selftests/ftrace: Add snapshot and tracing_on test case
cachefiles: Wait rather than BUG'ing on "Unexpected object collision"
cachefiles: Fix refcounting bug in backing-file read monitoring
fscache: Allow cancelled operations to be enqueued
net: axienet: Fix double deregister of mdio
bnx2x: Fix invalid memory access in rss hash config path.
media: staging: omap4iss: Include asm/cacheflush.h after generic includes
i2c: davinci: Avoid zero value of CLKH
can: mpc5xxx_can: check of_iomap return before use
net: prevent ISA drivers from building on PPC32
atl1c: reserve min skb headroom
qed: Fix possible race for the link state value.
net: caif: Add a missing rcu_read_unlock() in caif_flow_cb
tools/power turbostat: fix -S on UP systems
usb: gadget: f_uac2: fix endianness of 'struct cntrl_*_lay3'
tools: usb: ffs-test: Fix build on big endian systems
usb/phy: fix PPC64 build errors in phy-fsl-usb.c
usb: gadget: r8a66597: Fix a possible sleep-in-atomic-context bugs in r8a66597_queue()
usb: gadget: r8a66597: Fix two possible sleep-in-atomic-context bugs in init_controller()
drm/imx: imx-ldb: check if channel is enabled before printing warning
drm/imx: imx-ldb: disable LDB on driver bind
scsi: libiscsi: fix possible NULL pointer dereference in case of TMF
drm/bridge: adv7511: Reset registers on hotplug
nl80211: Add a missing break in parse_station_flags
mac80211: add stations tied to AP_VLANs during hw reconfig
xfrm: free skb if nlsk pointer is NULL
xfrm: fix missing dst_release() after policy blocking lbcast and multicast
vti6: fix PMTU caching and reporting on xmit
Cipso: cipso_v4_optptr enter infinite loop
sched/sysctl: Check user input value of sysctl_sched_time_avg
BACKPORT: zram: drop max_zpage_size and use zs_huge_class_size()
BACKPORT: zsmalloc: introduce zs_huge_class_size()
ANDROID: tracing: fix race condition reading saved tgids
Conflicts:
mm/zsmalloc.c
Change-Id: I1add2f0311c887c135ddc6160963702beeb7bb88
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Changes in 4.4.154
sched/sysctl: Check user input value of sysctl_sched_time_avg
Cipso: cipso_v4_optptr enter infinite loop
vti6: fix PMTU caching and reporting on xmit
xfrm: fix missing dst_release() after policy blocking lbcast and multicast
xfrm: free skb if nlsk pointer is NULL
mac80211: add stations tied to AP_VLANs during hw reconfig
nl80211: Add a missing break in parse_station_flags
drm/bridge: adv7511: Reset registers on hotplug
scsi: libiscsi: fix possible NULL pointer dereference in case of TMF
drm/imx: imx-ldb: disable LDB on driver bind
drm/imx: imx-ldb: check if channel is enabled before printing warning
usb: gadget: r8a66597: Fix two possible sleep-in-atomic-context bugs in init_controller()
usb: gadget: r8a66597: Fix a possible sleep-in-atomic-context bugs in r8a66597_queue()
usb/phy: fix PPC64 build errors in phy-fsl-usb.c
tools: usb: ffs-test: Fix build on big endian systems
usb: gadget: f_uac2: fix endianness of 'struct cntrl_*_lay3'
tools/power turbostat: fix -S on UP systems
net: caif: Add a missing rcu_read_unlock() in caif_flow_cb
qed: Fix possible race for the link state value.
atl1c: reserve min skb headroom
net: prevent ISA drivers from building on PPC32
can: mpc5xxx_can: check of_iomap return before use
i2c: davinci: Avoid zero value of CLKH
media: staging: omap4iss: Include asm/cacheflush.h after generic includes
bnx2x: Fix invalid memory access in rss hash config path.
net: axienet: Fix double deregister of mdio
fscache: Allow cancelled operations to be enqueued
cachefiles: Fix refcounting bug in backing-file read monitoring
cachefiles: Wait rather than BUG'ing on "Unexpected object collision"
selftests/ftrace: Add snapshot and tracing_on test case
zswap: re-check zswap_is_full() after do zswap_shrink()
tools/power turbostat: Read extended processor family from CPUID
Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum"
enic: handle mtu change for vf properly
arc: fix build errors in arc/include/asm/delay.h
arc: fix type warnings in arc/mm/cache.c
drivers: net: lmc: fix case value for target abort error
scsi: fcoe: drop frames in ELS LOGO error path
scsi: vmw_pvscsi: Return DID_RESET for status SAM_STAT_COMMAND_TERMINATED
mm/memory.c: check return value of ioremap_prot
cifs: add missing debug entries for kconfig options
cifs: check kmalloc before use
smb3: Do not send SMB3 SET_INFO if nothing changed
smb3: don't request leases in symlink creation and query
btrfs: don't leak ret from do_chunk_alloc
s390/kvm: fix deadlock when killed by oom
ext4: check for NUL characters in extended attribute's name
ext4: sysfs: print ext4_super_block fields as little-endian
ext4: reset error code in ext4_find_entry in fallback
arm64: mm: check for upper PAGE_SHIFT bits in pfn_valid()
KVM: arm/arm64: Skip updating PTE entry if no change
KVM: arm/arm64: Skip updating PMD entry if no change
x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit
x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM
x86/speculation/l1tf: Suggest what to do on systems with too much RAM
x86/process: Re-export start_thread()
fuse: Don't access pipe->buffers without pipe_lock()
fuse: fix double request_end()
fuse: fix unlocked access to processing queue
fuse: umount should wait for all requests
fuse: Fix oops at process_init_reply()
fuse: Add missed unlock_page() to fuse_readpages_fill()
udl-kms: change down_interruptible to down
udl-kms: handle allocation failure
udl-kms: fix crash due to uninitialized memory
ASoC: dpcm: don't merge format from invalid codec dai
ASoC: sirf: Fix potential NULL pointer dereference
pinctrl: freescale: off by one in imx1_pinconf_group_dbg_show()
x86/irqflags: Mark native_restore_fl extern inline
x86/spectre: Add missing family 6 check to microcode check
s390: fix br_r1_trampoline for machines without exrl
s390/qdio: reset old sbal_state flags
s390/pci: fix out of bounds access during irq setup
kprobes: Make list and blacklist root user read only
MIPS: Correct the 64-bit DSP accumulator register size
MIPS: lib: Provide MIPS64r6 __multi3() for GCC < 7
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
scsi: core: Avoid that SCSI device removal through sysfs triggers a deadlock
iscsi target: fix session creation failure handling
cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status
Linux 4.4.154
Change-Id: Ia008eef23c91fbd095f7b3343737cb2864875c52
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 690d9163bf4b8563a2682e619f938e6a0443947f upstream.
Some versions of GCC suboptimally generate calls to the __multi3()
intrinsic for MIPS64r6 builds, resulting in link failures due to the
missing function:
LD vmlinux.o
MODPOST vmlinux.o
kernel/bpf/verifier.o: In function `kmalloc_array':
include/linux/slab.h:631: undefined reference to `__multi3'
fs/select.o: In function `kmalloc_array':
include/linux/slab.h:631: undefined reference to `__multi3'
...
We already have a workaround for this in which we provide the
instrinsic, but we do so selectively for GCC 7 only. Unfortunately the
issue occurs with older GCC versions too - it has been observed with
both GCC 5.4.0 & GCC 6.4.0.
MIPSr6 support was introduced in GCC 5, so all major GCC versions prior
to GCC 8 are affected and we extend our workaround accordingly to all
MIPS64r6 builds using GCC versions older than GCC 8.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Vladimir Kondratiev <vladimir.kondratiev@intel.com>
Fixes: ebabcf17bcd7 ("MIPS: Implement __multi3 for GCC7 MIPS64r6 builds")
Patchwork: https://patchwork.linux-mips.org/patch/20297/
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # 4.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f5958b4cf4fc38ed4583ab83fb7c4cd1ab05f47b upstream.
Use the `unsigned long' rather than `__u32' type for DSP accumulator
registers, like with the regular MIPS multiply/divide accumulator and
general-purpose registers, as all are 64-bit in 64-bit implementations
and using a 32-bit data type leads to contents truncation on context
saving.
Update `arch_ptrace' and `compat_arch_ptrace' accordingly, removing
casts that are similarly not used with multiply/divide accumulator or
general-purpose register accesses.
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: e50c0a8fa60d ("Support the MIPS32 / MIPS64 DSP ASE.")
Patchwork: https://patchwork.linux-mips.org/patch/19329/
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 2.6.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 866f3576a72b2233a76dffb80290f8086dc49e17 upstream.
During interrupt setup we allocate interrupt vectors, walk the list of msi
descriptors, and fill in the message data. Requesting more interrupts than
supported on s390 can lead to an out of bounds access.
When we restrict the number of interrupts we should also stop walking the
msi list after all supported interrupts are handled.
Cc: stable@vger.kernel.org
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 64e03ff72623b8c2ea89ca3cb660094e019ed4ae upstream.
When allocating a new AOB fails, handle_outbound() is still capable of
transmitting the selected buffer (just without async completion).
But if a previous transfer on this queue slot used async completion, its
sbal_state flags field is still set to QDIO_OUTBUF_STATE_FLAG_PENDING.
So when the upper layer driver sees this stale flag, it expects an async
completion that never happens.
Fix this by unconditionally clearing the flags field.
Fixes: 104ea556ee7f ("qdio: support asynchronous delivery of storage blocks")
Cc: <stable@vger.kernel.org> #v3.2+
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 26f843848bae973817b3587780ce6b7b0200d3e4 upstream.
For machines without the exrl instruction the BFP jit generates
code that uses an "br %r1" instruction located in the lowcore page.
Unfortunately there is a cut & paste error that puts an additional
"larl %r1,.+14" instruction in the code that clobbers the branch
target address in %r1. Remove the larl instruction.
Cc: <stable@vger.kernel.org> # v4.17+
Fixes: de5cb6eb51 ("s390: use expoline thunks in the BPF JIT")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1ab534e85c93945f7862378d8c8adcf408205b19 upstream.
The check for Spectre microcodes does not check for family 6, only the
model numbers.
Add a family 6 check to avoid ambiguity with other families.
Fixes: a5b296636453 ("x86/cpufeature: Blacklist SPEC_CTRL/PRED_CMD on early Spectre v2 microcodes")
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180824170351.34874-2-andi@firstfloor.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1f59a4581b5ecfe9b4f049a7a2cf904d8352842d upstream.
This should have been marked extern inline in order to pick up the out
of line definition in arch/x86/kernel/irqflags.S.
Fixes: 208cbb325589 ("x86/irqflags: Provide a declaration for native_save_fl")
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180827214011.55428-1-ndesaulniers@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit dc76803e57cc86589c4efcb5362918f9b0c0436f upstream.
The consolidation of the start_thread() functions removed the export
unintentionally. This breaks binfmt handlers built as a module.
Add it back.
Fixes: e634d8fc792c ("x86-64: merge the standard and compat start_thread() functions")
Signed-off-by: Rian Hunter <rian@alum.mit.edu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Dmitry Safonov <dima@arista.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180819230854.7275-1-rian@alum.mit.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6a012288d6906fee1dbc244050ade1dafe4a9c8d upstream.
Two users have reported [1] that they have an "extremely unlikely" system
with more than MAX_PA/2 memory and L1TF mitigation is not effective.
Make the warning more helpful by suggesting the proper mem=X kernel boot
parameter to make it effective and a link to the L1TF document to help
decide if the mitigation is worth the unusable RAM.
[1] https://bugzilla.suse.com/show_bug.cgi?id=1105536
Suggested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/966571f0-9d7f-43dc-92c6-a10eec7a1254@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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much RAM
commit b0a182f875689647b014bc01d36b340217792852 upstream.
Two users have reported [1] that they have an "extremely unlikely" system
with more than MAX_PA/2 memory and L1TF mitigation is not effective. In
fact it's a CPU with 36bits phys limit (64GB) and 32GB memory, but due to
holes in the e820 map, the main region is almost 500MB over the 32GB limit:
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000081effffff] usable
Suggestions to use 'mem=32G' to enable the L1TF mitigation while losing the
500MB revealed, that there's an off-by-one error in the check in
l1tf_select_mitigation().
l1tf_pfn_limit() returns the last usable pfn (inclusive) and the range
check in the mitigation path does not take this into account.
Instead of amending the range check, make l1tf_pfn_limit() return the first
PFN which is over the limit which is less error prone. Adjust the other
users accordingly.
[1] https://bugzilla.suse.com/show_bug.cgi?id=1105536
Fixes: 17dbca119312 ("x86/speculation/l1tf: Add sysfs reporting for l1tf")
Reported-by: George Anchev <studio@anchev.net>
Reported-by: Christopher Snowhill <kode54@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180823134418.17008-1-vbabka@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9df9516940a61d29aedf4d91b483ca6597e7d480 upstream.
On 32bit PAE kernels on 64bit hardware with enough physical bits,
l1tf_pfn_limit() will overflow unsigned long. This in turn affects
max_swapfile_size() and can lead to swapon returning -EINVAL. This has been
observed in a 32bit guest with 42 bits physical address size, where
max_swapfile_size() overflows exactly to 1 << 32, thus zero, and produces
the following warning to dmesg:
[ 6.396845] Truncating oversized swap area, only using 0k out of 2047996k
Fix this by using unsigned long long instead.
Fixes: 17dbca119312 ("x86/speculation/l1tf: Add sysfs reporting for l1tf")
Fixes: 377eeaa8e11f ("x86/speculation/l1tf: Limit swap file size to MAX_PA/2")
Reported-by: Dominique Leuenberger <dimstar@suse.de>
Reported-by: Adrian Schroeter <adrian@suse.de>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180820095835.5298-1-vbabka@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 86658b819cd0a9aa584cd84453ed268a6f013770 upstream.
Contention on updating a PMD entry by a large number of vcpus can lead
to duplicate work when handling stage 2 page faults. As the page table
update follows the break-before-make requirement of the architecture,
it can lead to repeated refaults due to clearing the entry and
flushing the tlbs.
This problem is more likely when -
* there are large number of vcpus
* the mapping is large block mapping
such as when using PMD hugepages (512MB) with 64k pages.
Fix this by skipping the page table update if there is no change in
the entry being updated.
Cc: stable@vger.kernel.org
Fixes: ad361f093c1e ("KVM: ARM: Support hugetlbfs backed huge pages")
Reviewed-by: Suzuki Poulose <suzuki.poulose@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 976d34e2dab10ece5ea8fe7090b7692913f89084 upstream.
When there is contention on faulting in a particular page table entry
at stage 2, the break-before-make requirement of the architecture can
lead to additional refaulting due to TLB invalidation.
Avoid this by skipping a page table update if the new value of the PTE
matches the previous value.
Cc: stable@vger.kernel.org
Fixes: d5d8184d35c9 ("KVM: ARM: Memory virtualization setup")
Reviewed-by: Suzuki Poulose <suzuki.poulose@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5ad356eabc47d26a92140a0c4b20eba471c10de3 upstream.
ARM64's pfn_valid() shifts away the upper PAGE_SHIFT bits of the input
before seeing if the PFN is valid. This leads to false positives when
some of the upper bits are set, but the lower bits match a valid PFN.
For example, the following userspace code looks up a bogus entry in
/proc/kpageflags:
int pagemap = open("/proc/self/pagemap", O_RDONLY);
int pageflags = open("/proc/kpageflags", O_RDONLY);
uint64_t pfn, val;
lseek64(pagemap, [...], SEEK_SET);
read(pagemap, &pfn, sizeof(pfn));
if (pfn & (1UL << 63)) { /* valid PFN */
pfn &= ((1UL << 55) - 1); /* clear flag bits */
pfn |= (1UL << 55);
lseek64(pageflags, pfn * sizeof(uint64_t), SEEK_SET);
read(pageflags, &val, sizeof(val));
}
On ARM64 this causes the userspace process to crash with SIGSEGV rather
than reading (1 << KPF_NOPAGE). kpageflags_read() treats the offset as
valid, and stable_page_flags() will try to access an address between the
user and kernel address ranges.
Fixes: c1cc1552616d ("arm64: MMU initialisation")
Cc: stable@vger.kernel.org
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 306d6c49ac9ded11114cb53b0925da52f2c2ada1 upstream.
When the oom killer kills a userspace process in the page fault handler
while in guest context, the fault handler fails to release the mm_sem
if the FAULT_FLAG_RETRY_NOWAIT option is set. This leads to a deadlock
when tearing down the mm when the process terminates. This bug can only
happen when pfault is enabled, so only KVM clients are affected.
The problem arises in the rare cases in which handle_mm_fault does not
release the mm_sem. This patch fixes the issue by manually releasing
the mm_sem when needed.
Fixes: 24eb3a824c4f3 ("KVM: s390: Add FAULT_FLAG_RETRY_NOWAIT for guest fault")
Cc: <stable@vger.kernel.org> # 3.15+
Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit ec837d620c750c0d4996a907c8c4f7febe1bbeee ]
Fix type warnings in arch/arc/mm/cache.c.
../arch/arc/mm/cache.c: In function 'flush_anon_page':
../arch/arc/mm/cache.c:1062:55: warning: passing argument 2 of '__flush_dcache_page' makes integer from pointer without a cast [-Wint-conversion]
__flush_dcache_page((phys_addr_t)page_address(page), page_address(page));
^~~~~~~~~~~~~~~~~~
../arch/arc/mm/cache.c:1013:59: note: expected 'long unsigned int' but argument is of type 'void *'
void __flush_dcache_page(phys_addr_t paddr, unsigned long vaddr)
~~~~~~~~~~~~~~^~~~~
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: Elad Kanfi <eladkan@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Ofer Levi <oferle@mellanox.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 2423665ec53f2a29191b35382075e9834288a975 ]
Fix build errors in arch/arc/'s delay.h:
- add "extern unsigned long loops_per_jiffy;"
- add <asm-generic/types.h> for "u64"
In file included from ../drivers/infiniband/hw/cxgb3/cxio_hal.c:32:
../arch/arc/include/asm/delay.h: In function '__udelay':
../arch/arc/include/asm/delay.h:61:12: error: 'u64' undeclared (first use in this function)
loops = ((u64) usecs * 4295 * HZ * loops_per_jiffy) >> 32;
^~~
In file included from ../drivers/infiniband/hw/cxgb3/cxio_hal.c:32:
../arch/arc/include/asm/delay.h: In function '__udelay':
../arch/arc/include/asm/delay.h:63:37: error: 'loops_per_jiffy' undeclared (first use in this function)
loops = ((u64) usecs * 4295 * HZ * loops_per_jiffy) >> 32;
^~~~~~~~~~~~~~~
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Cc: Elad Kanfi <eladkan@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Ofer Levi <oferle@mellanox.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit d5ea019f8a381f88545bb26993b62ec24a2796b7 ]
This reverts commit 2a027b47dba6 ("MIPS: BCM47XX: Enable 74K Core
ExternalSync for PCIe erratum").
Enabling ExternalSync caused a regression for BCM4718A1 (used e.g. in
Netgear E3000 and ASUS RT-N16): it simply hangs during PCIe
initialization. It's likely that BCM4717A1 is also affected.
I didn't notice that earlier as the only BCM47XX devices with PCIe I
own are:
1) BCM4706 with 2 x 14e4:4331
2) BCM4706 with 14e4:4360 and 14e4:4331
it appears that BCM4706 is unaffected.
While BCM5300X-ES300-RDS.pdf seems to document that erratum and its
workarounds (according to quotes provided by Tokunori) it seems not even
Broadcom follows them.
According to the provided info Broadcom should define CONF7_ES in their
SDK's mipsinc.h and implement workaround in the si_mips_init(). Checking
both didn't reveal such code. It *could* mean Broadcom also had some
problems with the given workaround.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Michael Marley <michael@michaelmarley.com>
Patchwork: https://patchwork.linux-mips.org/patch/20032/
URL: https://bugs.openwrt.org/index.php?do=details&task_id=1688
Cc: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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New speed bin 3 for CPU frequency added to be able to scale to 2GHz.
Change-Id: I60bacc458c295d924a061a042aea058fbb2eb085
Signed-off-by: Taniya Das <tdas@codeaurora.org>
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Disable CONFIG_INET_LRO in sdm660_defconfig
and sdm660-perf_defconfig to avoid pop up.
Change-Id: I62069b3f8df27812f714e9875a0e7b7e20e31d4c
Signed-off-by: Vara Prasad A V S G <vavsg@codeaurora.org>
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>
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When CONFIG_ARM64_MODULE_PLTS is enabled, the first allocation using the
module space fails, because the module is too big, and then the module
allocation is attempted from vmalloc space. Silence the first allocation
failure in that case by setting __GFP_NOWARN.
Change-Id: I15999e9fb0405dbd76e74dde5b2f94025899d875
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-Repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Git-commit: 0c2cf6d9487cb90be6ad7fac66044dfa8e8e5243
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
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When CONFIG_ARM_MODULE_PLTS is enabled, the first allocation using the
module space fails, because the module is too big, and then the module
allocation is attempted from vmalloc space. Silence the first allocation
failure in that case by setting __GFP_NOWARN.
Change-Id: I94ed69d0cb42b16f68b08354f6f62dc22851d84a
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-commit: 75d24d968af8913f641c612930c96acc5399e427
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
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Align with android-base.cfg which is android kernel config
requirement for msm8998_defconfig.
Change-Id: I69cbca16705d25b5505792b11ae4f054be09457f
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>
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Add initial devices trees for SDM455 CDP devices
Change-Id: I33bf922baf1dcd5c214f0be81affba25eab0c70c
Signed-off-by: Teng Fei Fan <tengfei@codeaurora.org>
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Add initial devices trees for SDM455 QRD devices
Change-Id: I7107029ac33f47f1866d7907ff9086d98c466039
Signed-off-by: Teng Fei Fan <tengfei@codeaurora.org>
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Add initial device trees for SDM455 MTP devices
Change-Id: I8b8f3038ae435db9ea87c7e6a72d79e82f72806f
Signed-off-by: Teng Fei Fan <tengfei@codeaurora.org>
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Subsystem notification for adsp and wlan in guest.
Change-Id: I49e3e0a160a2434ba9df8008a5ad5051fbeed194
Signed-off-by: Venkata Rao Kakani <vkakani@codeaurora.org>
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Add the CPR configuration of Speed-bin 3 for the power
and performance cluster of SDM630.
Change-Id: I6bf9a837ae941cf3ad9413da6e44821916acf197
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
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Add support to dump complete ramdump of subsystem from start of first
segment to end of last segment without leaving any hole in between.
Change-Id: I0bcab1d4e04748d3934b7a4d99eec59727c3afb1
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>
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Invert the polarity of PMD_MPP_08 on msm8996 CV2X
to properly power on and off the external
modem as required.
Change-Id: I56226f4d14a2e21331bacf0a7125dc06bfd91aac
Signed-off-by: Aditya Mathur <aditmath@codeaurora.org>
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* refs/heads/tmp-5e24b4e
Linux 4.4.153
ovl: warn instead of error if d_type is not supported
ovl: Do d_type check only if work dir creation was successful
ovl: Ensure upper filesystem supports d_type
x86/mm: Fix use-after-free of ldt_struct
x86/mm/pat: Fix L1TF stable backport for CPA
ANDROID: x86_64_cuttlefish_defconfig: Enable lz4 compression for zram
UPSTREAM: drivers/block/zram/zram_drv.c: fix bug storing backing_dev
BACKPORT: zram: introduce zram memory tracking
BACKPORT: zram: record accessed second
BACKPORT: zram: mark incompressible page as ZRAM_HUGE
UPSTREAM: zram: correct flag name of ZRAM_ACCESS
UPSTREAM: zram: Delete gendisk before cleaning up the request queue
UPSTREAM: drivers/block/zram/zram_drv.c: make zram_page_end_io() static
BACKPORT: zram: set BDI_CAP_STABLE_WRITES once
UPSTREAM: zram: fix null dereference of handle
UPSTREAM: zram: add config and doc file for writeback feature
BACKPORT: zram: read page from backing device
BACKPORT: zram: write incompressible pages to backing device
BACKPORT: zram: identify asynchronous IO's return value
BACKPORT: zram: add free space management in backing device
UPSTREAM: zram: add interface to specif backing device
UPSTREAM: zram: rename zram_decompress_page to __zram_bvec_read
UPSTREAM: zram: inline zram_compress
UPSTREAM: zram: clean up duplicated codes in __zram_bvec_write
Linux 4.4.152
reiserfs: fix broken xattr handling (heap corruption, bad retval)
i2c: imx: Fix race condition in dma read
PCI: pciehp: Fix use-after-free on unplug
PCI: Skip MPS logic for Virtual Functions (VFs)
PCI: hotplug: Don't leak pci_slot on registration failure
parisc: Remove unnecessary barriers from spinlock.h
bridge: Propagate vlan add failure to user
packet: refine ring v3 block size test to hold one frame
netfilter: conntrack: dccp: treat SYNC/SYNCACK as invalid if no prior state
xfrm_user: prevent leaking 2 bytes of kernel memory
parisc: Remove ordered stores from syscall.S
ext4: fix spectre gadget in ext4_mb_regular_allocator()
KVM: irqfd: fix race between EPOLLHUP and irq_bypass_register_consumer
staging: android: ion: check for kref overflow
tcp: identify cryptic messages as TCP seq # bugs
net: qca_spi: Fix log level if probe fails
net: qca_spi: Make sure the QCA7000 reset is triggered
net: qca_spi: Avoid packet drop during initial sync
net: usb: rtl8150: demote allmulti message to dev_dbg()
net/ethernet/freescale/fman: fix cross-build error
drm/nouveau/gem: off by one bugs in nouveau_gem_pushbuf_reloc_apply()
tcp: remove DELAYED ACK events in DCTCP
qlogic: check kstrtoul() for errors
packet: reset network header if packet shorter than ll reserved space
ixgbe: Be more careful when modifying MAC filters
ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller
ARM: 8780/1: ftrace: Only set kernel memory back to read-only after boot
perf llvm-utils: Remove bashism from kernel include fetch script
bnxt_en: Fix for system hang if request_irq fails
drm/armada: fix colorkey mode property
ieee802154: fakelb: switch from BUG_ON() to WARN_ON() on problem
ieee802154: at86rf230: use __func__ macro for debug messages
ieee802154: at86rf230: switch from BUG_ON() to WARN_ON() on problem
ARM: pxa: irq: fix handling of ICMR registers in suspend/resume
netfilter: x_tables: set module owner for icmp(6) matches
smsc75xx: Add workaround for gigabit link up hardware errata.
kasan: fix shadow_size calculation error in kasan_module_alloc
tracing: Use __printf markup to silence compiler
ARM: imx_v4_v5_defconfig: Select ULPI support
ARM: imx_v6_v7_defconfig: Select ULPI support
HID: wacom: Correct touch maximum XY of 2nd-gen Intuos
m68k: fix "bad page state" oops on ColdFire boot
bnx2x: Fix receiving tx-timeout in error or recovery state.
drm/exynos: decon5433: Fix WINCONx reset value
drm/exynos: decon5433: Fix per-plane global alpha for XRGB modes
drm/exynos: gsc: Fix support for NV16/61, YUV420/YVU420 and YUV422 modes
md/raid10: fix that replacement cannot complete recovery after reassemble
dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()
ARM: dts: da850: Fix interrups property for gpio
selftests/x86/sigreturn/64: Fix spurious failures on AMD CPUs
perf report powerpc: Fix crash if callchain is empty
perf test session topology: Fix test on s390
usb: xhci: increase CRS timeout value
ARM: dts: am437x: make edt-ft5x06 a wakeup source
brcmfmac: stop watchdog before detach and free everything
cxgb4: when disabling dcb set txq dcb priority to 0
Smack: Mark inode instant in smack_task_to_inode
ipv6: mcast: fix unsolicited report interval after receiving querys
locking/lockdep: Do not record IRQ state within lockdep code
net: davinci_emac: match the mdio device against its compatible if possible
ARC: Enable machine_desc->init_per_cpu for !CONFIG_SMP
net: propagate dev_get_valid_name return code
net: hamradio: use eth_broadcast_addr
enic: initialize enic->rfs_h.lock in enic_probe
qed: Add sanity check for SIMD fastpath handler.
arm64: make secondary_start_kernel() notrace
scsi: xen-scsifront: add error handling for xenbus_printf
usb: gadget: dwc2: fix memory leak in gadget_init()
usb: gadget: composite: fix delayed_status race condition when set_interface
usb: dwc2: fix isoc split in transfer with no data
ARM: dts: Cygnus: Fix I2C controller interrupt type
selftests: sync: add config fragment for testing sync framework
selftests: zram: return Kselftest Skip code for skipped tests
selftests: user: return Kselftest Skip code for skipped tests
selftests: static_keys: return Kselftest Skip code for skipped tests
selftests: pstore: return Kselftest Skip code for skipped tests
netfilter: ipv6: nf_defrag: reduce struct net memory waste
ARC: Explicitly add -mmedium-calls to CFLAGS
ANDROID: x86_64_cuttlefish_defconfig: Enable zram and zstd
BACKPORT: crypto: zstd - Add zstd support
UPSTREAM: zram: add zstd to the supported algorithms list
UPSTREAM: lib: Add zstd modules
UPSTREAM: lib: Add xxhash module
UPSTREAM: zram: rework copy of compressor name in comp_algorithm_store()
UPSTREAM: zram: constify attribute_group structures.
UPSTREAM: zram: count same page write as page_stored
UPSTREAM: zram: reduce load operation in page_same_filled
UPSTREAM: zram: use zram_free_page instead of open-coded
UPSTREAM: zram: introduce zram data accessor
UPSTREAM: zram: remove zram_meta structure
UPSTREAM: zram: use zram_slot_lock instead of raw bit_spin_lock op
BACKPORT: zram: partial IO refactoring
BACKPORT: zram: handle multiple pages attached bio's bvec
UPSTREAM: zram: fix operator precedence to get offset
BACKPORT: zram: extend zero pages to same element pages
BACKPORT: zram: remove waitqueue for IO done
UPSTREAM: zram: remove obsolete sysfs attrs
UPSTREAM: zram: support BDI_CAP_STABLE_WRITES
UPSTREAM: zram: revalidate disk under init_lock
BACKPORT: mm: support anonymous stable page
UPSTREAM: zram: use __GFP_MOVABLE for memory allocation
UPSTREAM: zram: drop gfp_t from zcomp_strm_alloc()
UPSTREAM: zram: add more compression algorithms
UPSTREAM: zram: delete custom lzo/lz4
UPSTREAM: zram: cosmetic: cleanup documentation
UPSTREAM: zram: use crypto api to check alg availability
BACKPORT: zram: switch to crypto compress API
UPSTREAM: zram: rename zstrm find-release functions
UPSTREAM: zram: introduce per-device debug_stat sysfs node
UPSTREAM: zram: remove max_comp_streams internals
UPSTREAM: zram: user per-cpu compression streams
BACKPORT: zsmalloc: require GFP in zs_malloc()
UPSTREAM: zram/zcomp: do not zero out zcomp private pages
UPSTREAM: zram: pass gfp from zcomp frontend to backend
UPSTREAM: socket: close race condition between sock_close() and sockfs_setattr()
ANDROID: Refresh x86_64_cuttlefish_defconfig
Linux 4.4.151
isdn: Disable IIOCDBGVAR
Bluetooth: avoid killing an already killed socket
x86/mm: Simplify p[g4um]d_page() macros
serial: 8250_dw: always set baud rate in dw8250_set_termios
ACPI / PM: save NVS memory for ASUS 1025C laptop
ACPI: save NVS memory for Lenovo G50-45
USB: option: add support for DW5821e
USB: serial: sierra: fix potential deadlock at close
ALSA: vxpocket: Fix invalid endian conversions
ALSA: memalloc: Don't exceed over the requested size
ALSA: hda: Correct Asrock B85M-ITX power_save blacklist entry
ALSA: cs5535audio: Fix invalid endian conversion
ALSA: virmidi: Fix too long output trigger loop
ALSA: vx222: Fix invalid endian conversions
ALSA: hda - Turn CX8200 into D3 as well upon reboot
ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs
net_sched: fix NULL pointer dereference when delete tcindex filter
vsock: split dwork to avoid reinitializations
net_sched: Fix missing res info when create new tc_index filter
llc: use refcount_inc_not_zero() for llc_sap_find()
l2tp: use sk_dst_check() to avoid race on sk->sk_dst_cache
dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart()
Conflicts:
drivers/block/zram/zram_drv.c
drivers/staging/android/ion/ion.c
include/linux/swap.h
mm/zsmalloc.c
Change-Id: I1c437ac5133503a939d06d51ec778b65371df6d1
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Changes in 4.4.153
x86/mm/pat: Fix L1TF stable backport for CPA
x86/mm: Fix use-after-free of ldt_struct
ovl: Ensure upper filesystem supports d_type
ovl: Do d_type check only if work dir creation was successful
ovl: warn instead of error if d_type is not supported
Linux 4.4.153
Change-Id: I9876acd1c6799c9016edac4adf15dd3818866903
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit ccd5b3235180eef3cfec337df1c8554ab151b5cc upstream.
The following commit:
39a0526fb3f7 ("x86/mm: Factor out LDT init from context init")
renamed init_new_context() to init_new_context_ldt() and added a new
init_new_context() which calls init_new_context_ldt(). However, the
error code of init_new_context_ldt() was ignored. Consequently, if a
memory allocation in alloc_ldt_struct() failed during a fork(), the
->context.ldt of the new task remained the same as that of the old task
(due to the memcpy() in dup_mm()). ldt_struct's are not intended to be
shared, so a use-after-free occurred after one task exited.
Fix the bug by making init_new_context() pass through the error code of
init_new_context_ldt().
This bug was found by syzkaller, which encountered the following splat:
BUG: KASAN: use-after-free in free_ldt_struct.part.2+0x10a/0x150 arch/x86/kernel/ldt.c:116
Read of size 4 at addr ffff88006d2cb7c8 by task kworker/u9:0/3710
CPU: 1 PID: 3710 Comm: kworker/u9:0 Not tainted 4.13.0-rc4-next-20170811 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:16 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:52
print_address_description+0x73/0x250 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report+0x24e/0x340 mm/kasan/report.c:409
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:429
free_ldt_struct.part.2+0x10a/0x150 arch/x86/kernel/ldt.c:116
free_ldt_struct arch/x86/kernel/ldt.c:173 [inline]
destroy_context_ldt+0x60/0x80 arch/x86/kernel/ldt.c:171
destroy_context arch/x86/include/asm/mmu_context.h:157 [inline]
__mmdrop+0xe9/0x530 kernel/fork.c:889
mmdrop include/linux/sched/mm.h:42 [inline]
exec_mmap fs/exec.c:1061 [inline]
flush_old_exec+0x173c/0x1ff0 fs/exec.c:1291
load_elf_binary+0x81f/0x4ba0 fs/binfmt_elf.c:855
search_binary_handler+0x142/0x6b0 fs/exec.c:1652
exec_binprm fs/exec.c:1694 [inline]
do_execveat_common.isra.33+0x1746/0x22e0 fs/exec.c:1816
do_execve+0x31/0x40 fs/exec.c:1860
call_usermodehelper_exec_async+0x457/0x8f0 kernel/umh.c:100
ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431
Allocated by task 3700:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3627
kmalloc include/linux/slab.h:493 [inline]
alloc_ldt_struct+0x52/0x140 arch/x86/kernel/ldt.c:67
write_ldt+0x7b7/0xab0 arch/x86/kernel/ldt.c:277
sys_modify_ldt+0x1ef/0x240 arch/x86/kernel/ldt.c:307
entry_SYSCALL_64_fastpath+0x1f/0xbe
Freed by task 3700:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x43/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3503 [inline]
kfree+0xca/0x250 mm/slab.c:3820
free_ldt_struct.part.2+0xdd/0x150 arch/x86/kernel/ldt.c:121
free_ldt_struct arch/x86/kernel/ldt.c:173 [inline]
destroy_context_ldt+0x60/0x80 arch/x86/kernel/ldt.c:171
destroy_context arch/x86/include/asm/mmu_context.h:157 [inline]
__mmdrop+0xe9/0x530 kernel/fork.c:889
mmdrop include/linux/sched/mm.h:42 [inline]
__mmput kernel/fork.c:916 [inline]
mmput+0x541/0x6e0 kernel/fork.c:927
copy_process.part.36+0x22e1/0x4af0 kernel/fork.c:1931
copy_process kernel/fork.c:1546 [inline]
_do_fork+0x1ef/0xfb0 kernel/fork.c:2025
SYSC_clone kernel/fork.c:2135 [inline]
SyS_clone+0x37/0x50 kernel/fork.c:2129
do_syscall_64+0x26c/0x8c0 arch/x86/entry/common.c:287
return_from_SYSCALL_64+0x0/0x7a
Here is a C reproducer:
#include <asm/ldt.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <unistd.h>
static void *fork_thread(void *_arg)
{
fork();
}
int main(void)
{
struct user_desc desc = { .entry_number = 8191 };
syscall(__NR_modify_ldt, 1, &desc, sizeof(desc));
for (;;) {
if (fork() == 0) {
pthread_t t;
srand(getpid());
pthread_create(&t, NULL, fork_thread, NULL);
usleep(rand() % 10000);
syscall(__NR_exit_group, 0);
}
wait(NULL);
}
}
Note: the reproducer takes advantage of the fact that alloc_ldt_struct()
may use vmalloc() to allocate a large ->entries array, and after
commit:
5d17a73a2ebe ("vmalloc: back off when the current task is killed")
it is possible for userspace to fail a task's vmalloc() by
sending a fatal signal, e.g. via exit_group(). It would be more
difficult to reproduce this bug on kernels without that commit.
This bug only affected kernels with CONFIG_MODIFY_LDT_SYSCALL=y.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <stable@vger.kernel.org> [v4.6+]
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Fixes: 39a0526fb3f7 ("x86/mm: Factor out LDT init from context init")
Link: http://lkml.kernel.org/r/20170824175029.76040-1-ebiggers3@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Patch for stable only to fix boot resets caused by the L1TF patches.
Stable trees reverted the following patch
Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"
This reverts commit 87e2bd898d3a79a8c609f183180adac47879a2a4 which is
commit edc3b9129cecd0f0857112136f5b8b1bc1d45918 upstream.
but the L1TF patch backported here
x86/mm/pat: Make set_memory_np() L1TF safe
commit 958f79b9ee55dfaf00c8106ed1c22a2919e0028b upstream
set_memory_np() is used to mark kernel mappings not present, but it has
it's own open coded mechanism which does not have the L1TF protection of
inverting the address bits.
assumed that cpa->pfn contains a PFN. With the above patch reverted
it does not, which causes the PMD to be set to an incorrect address
shifted by 12 bits, which can cause early boot reset on some
systems, like an Apollo Lake embedded system.
Convert the address to a PFN before passing it to pmd_pfn()
Thanks to Bernhard for bisecting and testing.
Cc: stable@vger.kernel.org # 4.4 and 4.9
Reported-by: Bernhard Kaindl <bernhard.kaindl@thalesgroup.com>
Tested-by: Bernhard Kaindl <bernhard.kaindl@thalesgroup.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: Iab302cdf63691a3cc3124b5826206b9f6bd4adfb
Signed-off-by: Peter Kalauskas <peskal@google.com>
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Changes in 4.4.152
ARC: Explicitly add -mmedium-calls to CFLAGS
netfilter: ipv6: nf_defrag: reduce struct net memory waste
selftests: pstore: return Kselftest Skip code for skipped tests
selftests: static_keys: return Kselftest Skip code for skipped tests
selftests: user: return Kselftest Skip code for skipped tests
selftests: zram: return Kselftest Skip code for skipped tests
selftests: sync: add config fragment for testing sync framework
ARM: dts: Cygnus: Fix I2C controller interrupt type
usb: dwc2: fix isoc split in transfer with no data
usb: gadget: composite: fix delayed_status race condition when set_interface
usb: gadget: dwc2: fix memory leak in gadget_init()
scsi: xen-scsifront: add error handling for xenbus_printf
arm64: make secondary_start_kernel() notrace
qed: Add sanity check for SIMD fastpath handler.
enic: initialize enic->rfs_h.lock in enic_probe
net: hamradio: use eth_broadcast_addr
net: propagate dev_get_valid_name return code
ARC: Enable machine_desc->init_per_cpu for !CONFIG_SMP
net: davinci_emac: match the mdio device against its compatible if possible
locking/lockdep: Do not record IRQ state within lockdep code
ipv6: mcast: fix unsolicited report interval after receiving querys
Smack: Mark inode instant in smack_task_to_inode
cxgb4: when disabling dcb set txq dcb priority to 0
brcmfmac: stop watchdog before detach and free everything
ARM: dts: am437x: make edt-ft5x06 a wakeup source
usb: xhci: increase CRS timeout value
perf test session topology: Fix test on s390
perf report powerpc: Fix crash if callchain is empty
selftests/x86/sigreturn/64: Fix spurious failures on AMD CPUs
ARM: dts: da850: Fix interrups property for gpio
dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()
md/raid10: fix that replacement cannot complete recovery after reassemble
drm/exynos: gsc: Fix support for NV16/61, YUV420/YVU420 and YUV422 modes
drm/exynos: decon5433: Fix per-plane global alpha for XRGB modes
drm/exynos: decon5433: Fix WINCONx reset value
bnx2x: Fix receiving tx-timeout in error or recovery state.
m68k: fix "bad page state" oops on ColdFire boot
HID: wacom: Correct touch maximum XY of 2nd-gen Intuos
ARM: imx_v6_v7_defconfig: Select ULPI support
ARM: imx_v4_v5_defconfig: Select ULPI support
tracing: Use __printf markup to silence compiler
kasan: fix shadow_size calculation error in kasan_module_alloc
smsc75xx: Add workaround for gigabit link up hardware errata.
netfilter: x_tables: set module owner for icmp(6) matches
ARM: pxa: irq: fix handling of ICMR registers in suspend/resume
ieee802154: at86rf230: switch from BUG_ON() to WARN_ON() on problem
ieee802154: at86rf230: use __func__ macro for debug messages
ieee802154: fakelb: switch from BUG_ON() to WARN_ON() on problem
drm/armada: fix colorkey mode property
bnxt_en: Fix for system hang if request_irq fails
perf llvm-utils: Remove bashism from kernel include fetch script
ARM: 8780/1: ftrace: Only set kernel memory back to read-only after boot
ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller
ixgbe: Be more careful when modifying MAC filters
packet: reset network header if packet shorter than ll reserved space
qlogic: check kstrtoul() for errors
tcp: remove DELAYED ACK events in DCTCP
drm/nouveau/gem: off by one bugs in nouveau_gem_pushbuf_reloc_apply()
net/ethernet/freescale/fman: fix cross-build error
net: usb: rtl8150: demote allmulti message to dev_dbg()
net: qca_spi: Avoid packet drop during initial sync
net: qca_spi: Make sure the QCA7000 reset is triggered
net: qca_spi: Fix log level if probe fails
tcp: identify cryptic messages as TCP seq # bugs
staging: android: ion: check for kref overflow
KVM: irqfd: fix race between EPOLLHUP and irq_bypass_register_consumer
ext4: fix spectre gadget in ext4_mb_regular_allocator()
parisc: Remove ordered stores from syscall.S
xfrm_user: prevent leaking 2 bytes of kernel memory
netfilter: conntrack: dccp: treat SYNC/SYNCACK as invalid if no prior state
packet: refine ring v3 block size test to hold one frame
bridge: Propagate vlan add failure to user
parisc: Remove unnecessary barriers from spinlock.h
PCI: hotplug: Don't leak pci_slot on registration failure
PCI: Skip MPS logic for Virtual Functions (VFs)
PCI: pciehp: Fix use-after-free on unplug
i2c: imx: Fix race condition in dma read
reiserfs: fix broken xattr handling (heap corruption, bad retval)
Linux 4.4.152
Change-Id: I1058813031709d20abd0bc45e9ac5fc68ab3a1d7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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