| Commit message (Collapse) | Author | Age |
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commit 8ef4227615e158faa4ee85a1d6466782f7e22f2f upstream.
A recent change to the mm code in:
87744ab3832b mm: fix cache mode tracking in vm_insert_mixed()
started enforcing checking the memory type against the registered list for
amixed pfn insertion mappings. It happens that the drm drivers for a number
of gpus relied on this being broken. Currently the driver only inserted
VRAM mappings into the tracking table when they came from the kernel,
and userspace mappings never landed in the table. This led to a regression
where all the mapping end up as UC instead of WC now.
I've considered a number of solutions but since this needs to be fixed
in fixes and not next, and some of the solutions were going to introduce
overhead that hadn't been there before I didn't consider them viable at
this stage. These mainly concerned hooking into the TTM io reserve APIs,
but these API have a bunch of fast paths I didn't want to unwind to add
this to.
The solution I've decided on is to add a new API like the arch_phys_wc
APIs (these would have worked but wc_del didn't take a range), and
use them from the drivers to add a WC compatible mapping to the table
for all VRAM on those GPUs. This means we can then create userspace
mapping that won't get degraded to UC.
v1.1: use CONFIG_X86_PAT + add some comments in io.h
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: x86@kernel.org
Cc: mcgrof@suse.com
Cc: Dan Williams <dan.j.williams@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bb24153a3f13dd0dbc1f8055ad97fe346d598f66 upstream.
The default delay 5 jiffies is too much when the kernel is compiled with
HZ=100 - it results in jumpy cursor in Xwindow.
In order to find out the optimal delay, I benchmarked the driver on
1280x720x30fps video. I found out that with HZ=1000, 10ms is acceptable,
but with HZ=250 or HZ=300, we need 4ms, so that the video is played
without any frame skips.
This patch changes the delay to this value.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1c48db44924298ad0cb5a6386b88017539be8822 upstream.
PFSID should be used in the invalidation descriptor for flushing
device IOTLBs on SRIOV VFs.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: stable@vger.kernel.org
Cc: "Ashok Raj" <ashok.raj@intel.com>
Cc: "Lu Baolu" <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0f725561e168485eff7277d683405c05b192f537 upstream.
When SRIOV VF device IOTLB is invalidated, we need to provide
the PF source ID such that IOMMU hardware can gauge the depth
of invalidation queue which is shared among VFs. This is needed
when device invalidation throttle (DIT) capability is supported.
This patch adds bit definitions for checking and tracking PFSID.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: stable@vger.kernel.org
Cc: "Ashok Raj" <ashok.raj@intel.com>
Cc: "Lu Baolu" <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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 2afc9166f79b8f6da5f347f48515215ceee4ae37 upstream.
Introduce these two functions and export them such that the next patch
can add calls to these functions from the SCSI core.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Patch series "zsmalloc/zram: drop zram's max_zpage_size", v3.
ZRAM's max_zpage_size is a bad thing. It forces zsmalloc to store
normal objects as huge ones, which results in bigger zsmalloc memory
usage. Drop it and use actual zsmalloc huge-class value when decide if
the object is huge or not.
This patch (of 2):
Not every object can be share its zspage with other objects, e.g. when
the object is as big as zspage or nearly as big a zspage. For such
objects zsmalloc has a so called huge class - every object which belongs
to huge class consumes the entire zspage (which consists of a physical
page). On x86_64, PAGE_SHIFT 12 box, the first non-huge class size is
3264, so starting down from size 3264, objects can share page(-s) and
thus minimize memory wastage.
ZRAM, however, has its own statically defined watermark for huge
objects, namely "3 * PAGE_SIZE / 4 = 3072", and forcibly stores every
object larger than this watermark (3072) as a PAGE_SIZE object, in other
words, to a huge class, while zsmalloc can keep some of those objects in
non-huge classes. This results in increased memory consumption.
zsmalloc knows better if the object is huge or not. Introduce
zs_huge_class_size() function which tells if the given object can be
stored in one of non-huge classes or not. This will let us to drop
ZRAM's huge object watermark and fully rely on zsmalloc when we decide
if the object is huge.
[sergey.senozhatsky.work@gmail.com: add pool param to zs_huge_class_size()]
Link: http://lkml.kernel.org/r/20180314081833.1096-2-sergey.senozhatsky@gmail.com
Link: http://lkml.kernel.org/r/20180306070639.7389-2-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 010b495e2fa32353d0ef6aa70a8169e5ef617a15)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 113183619
Change-Id: Ic35f8c1ec75f0b78bf2d83729b6aedd2999f25c8
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New msg SSIDs, log and event mask codes for different subsystems
are added as a new requirement for enable logging.
Change-Id: I31e784307e6de388e1de0806baacf00116360c30
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>
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Add socinfo support for SDM455 Soc and update the
bindings fot the same.
Change-Id: I9b30795e202d84ae06020983b2d656772fb4f313
Signed-off-by: Teng Fei Fan <tengfei@codeaurora.org>
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API provision for WLAN host driver to check if WLAN PCIe device
is down.
Change-Id: I91efcd781af67c72b787c89e6b619c4cc49da34b
Signed-off-by: Yue Ma <yuem@codeaurora.org>
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Not all devices on an MDIO bus are PHYs. Meaning not all MDIO drivers
are PHY drivers. Add support for generic MDIO drivers.
Change-Id: I65c7c8a497bbac9ef67b3d21c869818a09378e3c
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-Commit: a9049e0c513c4521dbfaa302af8ed08b3366b41f
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Anthony Mah <amah@codeaurora.org>
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It is required to notify device as selfpowered and bmaxpower as zero
even for non PD capable devices based on Type C current. Hence notify
as selfpowerer in bMattributes of configuation descriptor in case of
medium or high Type C current.
Change-Id: Ie552560d93a8195f4c69fdaf6086ef3a52b31d39
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@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 4.4.152
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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[ Upstream commit c133459765fae249ba482f62e12f987aec4376f0 ]
CC [M] drivers/net/ethernet/freescale/fman/fman.o
In file included from ../drivers/net/ethernet/freescale/fman/fman.c:35:
../include/linux/fsl/guts.h: In function 'guts_set_dmacr':
../include/linux/fsl/guts.h:165:2: error: implicit declaration of function 'clrsetbits_be32' [-Werror=implicit-function-declaration]
clrsetbits_be32(&guts->dmacr, 3 << shift, device << shift);
^~~~~~~~~~~~~~~
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Madalin Bucur <madalin.bucur@nxp.com>
Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit a69258f7aa2623e0930212f09c586fd06674ad79 ]
After fixing the way DCTCP tracking delayed ACKs, the delayed-ACK
related callbacks are no longer needed
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 9ce7bc036ae4cfe3393232c86e9e1fea2153c237 ]
It is a waste of memory to use a full "struct netns_sysctl_ipv6"
while only one pointer is really used, considering netns_sysctl_ipv6
keeps growing.
Also, since "struct netns_frags" has cache line alignment,
it is better to move the frags_hdr pointer outside, otherwise
we spend a full cache line for this pointer.
This saves 192 bytes of memory per netns.
Fixes: c038a767cd69 ("ipv6: add a new namespace for nf_conntrack_reasm")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add zstd compression and decompression kernel modules.
zstd offers a wide varity of compression speed and quality trade-offs.
It can compress at speeds approaching lz4, and quality approaching lzma.
zstd decompressions at speeds more than twice as fast as zlib, and
decompression speed remains roughly the same across all compression levels.
The code was ported from the upstream zstd source repository. The
`linux/zstd.h` header was modified to match linux kernel style.
The cross-platform and allocation code was stripped out. Instead zstd
requires the caller to pass a preallocated workspace. The source files
were clang-formatted [1] to match the Linux Kernel style as much as
possible. Otherwise, the code was unmodified. We would like to avoid
as much further manual modification to the source code as possible, so it
will be easier to keep the kernel zstd up to date.
I benchmarked zstd compression as a special character device. I ran zstd
and zlib compression at several levels, as well as performing no
compression, which measure the time spent copying the data to kernel space.
Data is passed to the compresser 4096 B at a time. The benchmark file is
located in the upstream zstd source repository under
`contrib/linux-kernel/zstd_compress_test.c` [2].
I ran the benchmarks on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM.
The VM is running on a MacBook Pro with a 3.1 GHz Intel Core i7 processor,
16 GB of RAM, and a SSD. I benchmarked using `silesia.tar` [3], which is
211,988,480 B large. Run the following commands for the benchmark:
sudo modprobe zstd_compress_test
sudo mknod zstd_compress_test c 245 0
sudo cp silesia.tar zstd_compress_test
The time is reported by the time of the userland `cp`.
The MB/s is computed with
1,536,217,008 B / time(buffer size, hash)
which includes the time to copy from userland.
The Adjusted MB/s is computed with
1,536,217,088 B / (time(buffer size, hash) - time(buffer size, none)).
The memory reported is the amount of memory the compressor requests.
| Method | Size (B) | Time (s) | Ratio | MB/s | Adj MB/s | Mem (MB) |
|----------|----------|----------|-------|---------|----------|----------|
| none | 11988480 | 0.100 | 1 | 2119.88 | - | - |
| zstd -1 | 73645762 | 1.044 | 2.878 | 203.05 | 224.56 | 1.23 |
| zstd -3 | 66988878 | 1.761 | 3.165 | 120.38 | 127.63 | 2.47 |
| zstd -5 | 65001259 | 2.563 | 3.261 | 82.71 | 86.07 | 2.86 |
| zstd -10 | 60165346 | 13.242 | 3.523 | 16.01 | 16.13 | 13.22 |
| zstd -15 | 58009756 | 47.601 | 3.654 | 4.45 | 4.46 | 21.61 |
| zstd -19 | 54014593 | 102.835 | 3.925 | 2.06 | 2.06 | 60.15 |
| zlib -1 | 77260026 | 2.895 | 2.744 | 73.23 | 75.85 | 0.27 |
| zlib -3 | 72972206 | 4.116 | 2.905 | 51.50 | 52.79 | 0.27 |
| zlib -6 | 68190360 | 9.633 | 3.109 | 22.01 | 22.24 | 0.27 |
| zlib -9 | 67613382 | 22.554 | 3.135 | 9.40 | 9.44 | 0.27 |
I benchmarked zstd decompression using the same method on the same machine.
The benchmark file is located in the upstream zstd repo under
`contrib/linux-kernel/zstd_decompress_test.c` [4]. The memory reported is
the amount of memory required to decompress data compressed with the given
compression level. If you know the maximum size of your input, you can
reduce the memory usage of decompression irrespective of the compression
level.
| Method | Time (s) | MB/s | Adjusted MB/s | Memory (MB) |
|----------|----------|---------|---------------|-------------|
| none | 0.025 | 8479.54 | - | - |
| zstd -1 | 0.358 | 592.15 | 636.60 | 0.84 |
| zstd -3 | 0.396 | 535.32 | 571.40 | 1.46 |
| zstd -5 | 0.396 | 535.32 | 571.40 | 1.46 |
| zstd -10 | 0.374 | 566.81 | 607.42 | 2.51 |
| zstd -15 | 0.379 | 559.34 | 598.84 | 4.61 |
| zstd -19 | 0.412 | 514.54 | 547.77 | 8.80 |
| zlib -1 | 0.940 | 225.52 | 231.68 | 0.04 |
| zlib -3 | 0.883 | 240.08 | 247.07 | 0.04 |
| zlib -6 | 0.844 | 251.17 | 258.84 | 0.04 |
| zlib -9 | 0.837 | 253.27 | 287.64 | 0.04 |
Tested in userland using the test-suite in the zstd repo under
`contrib/linux-kernel/test/UserlandTest.cpp` [5] by mocking the kernel
functions. Fuzz tested using libfuzzer [6] with the fuzz harnesses under
`contrib/linux-kernel/test/{RoundTripCrash.c,DecompressCrash.c}` [7] [8]
with ASAN, UBSAN, and MSAN. Additionaly, it was tested while testing the
BtrFS and SquashFS patches coming next.
[1] https://clang.llvm.org/docs/ClangFormat.html
[2] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/zstd_compress_test.c
[3] http://sun.aei.polsl.pl/~sdeor/index.php?page=silesia
[4] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/zstd_decompress_test.c
[5] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/test/UserlandTest.cpp
[6] http://llvm.org/docs/LibFuzzer.html
[7] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/test/RoundTripCrash.c
[8] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/test/DecompressCrash.c
zstd source repository: https://github.com/facebook/zstd
Signed-off-by: Nick Terrell <terrelln@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
(cherry picked from commit 73f3d1b48f5069d46ba48aa28c2898dc93185560)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I47b9d43a8065b2b5a1362f8458065f0811cf70b9
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Adds xxhash kernel module with xxh32 and xxh64 hashes. xxhash is an
extremely fast non-cryptographic hash algorithm for checksumming.
The zstd compression and decompression modules added in the next patch
require xxhash. I extracted it out from zstd since it is useful on its
own. I copied the code from the upstream XXHash source repository and
translated it into kernel style. I ran benchmarks and tests in the kernel
and tests in userland.
I benchmarked xxhash as a special character device. I ran in four modes,
no-op, xxh32, xxh64, and crc32. The no-op mode simply copies the data to
kernel space and ignores it. The xxh32, xxh64, and crc32 modes compute
hashes on the copied data. I also ran it with four different buffer sizes.
The benchmark file is located in the upstream zstd source repository under
`contrib/linux-kernel/xxhash_test.c` [1].
I ran the benchmarks on a Ubuntu 14.04 VM with 2 cores and 4 GiB of RAM.
The VM is running on a MacBook Pro with a 3.1 GHz Intel Core i7 processor,
16 GB of RAM, and a SSD. I benchmarked using the file `filesystem.squashfs`
from `ubuntu-16.10-desktop-amd64.iso`, which is 1,536,217,088 B large.
Run the following commands for the benchmark:
modprobe xxhash_test
mknod xxhash_test c 245 0
time cp filesystem.squashfs xxhash_test
The time is reported by the time of the userland `cp`.
The GB/s is computed with
1,536,217,008 B / time(buffer size, hash)
which includes the time to copy from userland.
The Normalized GB/s is computed with
1,536,217,088 B / (time(buffer size, hash) - time(buffer size, none)).
| Buffer Size (B) | Hash | Time (s) | GB/s | Adjusted GB/s |
|-----------------|-------|----------|------|---------------|
| 1024 | none | 0.408 | 3.77 | - |
| 1024 | xxh32 | 0.649 | 2.37 | 6.37 |
| 1024 | xxh64 | 0.542 | 2.83 | 11.46 |
| 1024 | crc32 | 1.290 | 1.19 | 1.74 |
| 4096 | none | 0.380 | 4.04 | - |
| 4096 | xxh32 | 0.645 | 2.38 | 5.79 |
| 4096 | xxh64 | 0.500 | 3.07 | 12.80 |
| 4096 | crc32 | 1.168 | 1.32 | 1.95 |
| 8192 | none | 0.351 | 4.38 | - |
| 8192 | xxh32 | 0.614 | 2.50 | 5.84 |
| 8192 | xxh64 | 0.464 | 3.31 | 13.60 |
| 8192 | crc32 | 1.163 | 1.32 | 1.89 |
| 16384 | none | 0.346 | 4.43 | - |
| 16384 | xxh32 | 0.590 | 2.60 | 6.30 |
| 16384 | xxh64 | 0.466 | 3.30 | 12.80 |
| 16384 | crc32 | 1.183 | 1.30 | 1.84 |
Tested in userland using the test-suite in the zstd repo under
`contrib/linux-kernel/test/XXHashUserlandTest.cpp` [2] by mocking the
kernel functions. A line in each branch of every function in `xxhash.c`
was commented out to ensure that the test-suite fails. Additionally
tested while testing zstd and with SMHasher [3].
[1] https://phabricator.intern.facebook.com/P57526246
[2] https://github.com/facebook/zstd/blob/dev/contrib/linux-kernel/test/XXHashUserlandTest.cpp
[3] https://github.com/aappleby/smhasher
zstd source repository: https://github.com/facebook/zstd
XXHash source repository: https://github.com/cyan4973/xxhash
Signed-off-by: Nick Terrell <terrelln@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
(cherry picked from commit 5d2405227a9eaea48e8cc95756a06d407b11f141)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I4b63e96457f17cf455591e8f35058dacd7aa9004
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During developemnt for zram-swap asynchronous writeback, I found strange
corruption of compressed page, resulting in:
Modules linked in: zram(E)
CPU: 3 PID: 1520 Comm: zramd-1 Tainted: G E 4.8.0-mm1-00320-ge0d4894c9c38-dirty #3274
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
task: ffff88007620b840 task.stack: ffff880078090000
RIP: set_freeobj.part.43+0x1c/0x1f
RSP: 0018:ffff880078093ca8 EFLAGS: 00010246
RAX: 0000000000000018 RBX: ffff880076798d88 RCX: ffffffff81c408c8
RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000246
RBP: ffff880078093cb0 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88005bc43030 R11: 0000000000001df3 R12: ffff880076798d88
R13: 000000000005bc43 R14: ffff88007819d1b8 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff88007e380000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc934048f20 CR3: 0000000077b01000 CR4: 00000000000406e0
Call Trace:
obj_malloc+0x22b/0x260
zs_malloc+0x1e4/0x580
zram_bvec_rw+0x4cd/0x830 [zram]
page_requests_rw+0x9c/0x130 [zram]
zram_thread+0xe6/0x173 [zram]
kthread+0xca/0xe0
ret_from_fork+0x25/0x30
With investigation, it reveals currently stable page doesn't support
anonymous page. IOW, reuse_swap_page can reuse the page without waiting
writeback completion so it can overwrite page zram is compressing.
Unfortunately, zram has used per-cpu stream feature from v4.7.
It aims for increasing cache hit ratio of scratch buffer for
compressing. Downside of that approach is that zram should ask
memory space for compressed page in per-cpu context which requires
stricted gfp flag which could be failed. If so, it retries to
allocate memory space out of per-cpu context so it could get memory
this time and compress the data again, copies it to the memory space.
In this scenario, zram assumes the data should never be changed
but it is not true unless stable page supports. So, If the data is
changed under us, zram can make buffer overrun because second
compression size could be bigger than one we got in previous trial
and blindly, copy bigger size object to smaller buffer which is
buffer overrun. The overrun breaks zsmalloc free object chaining
so system goes crash like above.
I think below is same problem.
https://bugzilla.suse.com/show_bug.cgi?id=997574
Unfortunately, reuse_swap_page should be atomic so that we cannot wait on
writeback in there so the approach in this patch is simply return false if
we found it needs stable page. Although it increases memory footprint
temporarily, it happens rarely and it should be reclaimed easily althoug
it happened. Also, It would be better than waiting of IO completion,
which is critial path for application latency.
Fixes: da9556a2367c ("zram: user per-cpu compression streams")
Link: http://lkml.kernel.org/r/20161120233015.GA14113@bbox
Link: http://lkml.kernel.org/r/1482366980-3782-2-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Hyeoncheol Lee <cheol.lee@lge.com>
Cc: <yjay.kim@lge.com>
Cc: Sangseok Lee <sangseok.lee@lge.com>
Cc: <stable@vger.kernel.org> [4.7+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit f05714293a591038304ddae7cb0dd747bb3786cc)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I0fa5012aff9daf614b2d1d04f35b86ff7043ff21
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Pass GFP flags to zs_malloc() instead of using a fixed mask supplied to
zs_create_pool(), so we can be more flexible, but, more importantly, we
need this to switch zram to per-cpu compression streams -- zram will try
to allocate handle with preemption disabled in a fast path and switch to
a slow path (using different gfp mask) if the fast one has failed.
Apart from that, this also align zs_malloc() interface with zspool/zbud.
[sergey.senozhatsky@gmail.com: pass GFP flags to zs_malloc() instead of using a fixed mask]
Link: http://lkml.kernel.org/r/20160429150942.GA637@swordfish
Link: http://lkml.kernel.org/r/20160429150942.GA637@swordfish
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit d0d8da2dc49dfdfe1d788eaf4d55eb5d4964d926)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I31276c9351be21a4ed588681b332e98142b76526
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Changes in 4.4.151
dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart()
l2tp: use sk_dst_check() to avoid race on sk->sk_dst_cache
llc: use refcount_inc_not_zero() for llc_sap_find()
net_sched: Fix missing res info when create new tc_index filter
vsock: split dwork to avoid reinitializations
net_sched: fix NULL pointer dereference when delete tcindex filter
ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs
ALSA: hda - Turn CX8200 into D3 as well upon reboot
ALSA: vx222: Fix invalid endian conversions
ALSA: virmidi: Fix too long output trigger loop
ALSA: cs5535audio: Fix invalid endian conversion
ALSA: hda: Correct Asrock B85M-ITX power_save blacklist entry
ALSA: memalloc: Don't exceed over the requested size
ALSA: vxpocket: Fix invalid endian conversions
USB: serial: sierra: fix potential deadlock at close
USB: option: add support for DW5821e
ACPI: save NVS memory for Lenovo G50-45
ACPI / PM: save NVS memory for ASUS 1025C laptop
serial: 8250_dw: always set baud rate in dw8250_set_termios
x86/mm: Simplify p[g4um]d_page() macros
Bluetooth: avoid killing an already killed socket
isdn: Disable IIOCDBGVAR
Linux 4.4.151
Change-Id: I717cee04f3c1a5c7fbacf696e0a5c32ca67aedf8
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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[ Upstream commit 455f05ecd2b219e9a216050796d30c830d9bc393 ]
syzbot reported that we reinitialize an active delayed
work in vsock_stream_connect():
ODEBUG: init active (active state 0) object type: timer_list hint:
delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1414
WARNING: CPU: 1 PID: 11518 at lib/debugobjects.c:329
debug_print_object+0x16a/0x210 lib/debugobjects.c:326
The pattern is apparently wrong, we should only initialize
the dealyed work once and could repeatly schedule it. So we
have to move out the initializations to allocation side.
And to avoid confusion, we can split the shared dwork
into two, instead of re-using the same one.
Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Reported-by: <syzbot+8a9b1bd330476a4f3db6@syzkaller.appspotmail.com>
Cc: Andy king <acking@vmware.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 0dcb82254d65f72333aa50ad626d1e9665ad093b ]
llc_sap_put() decreases the refcnt before deleting sap
from the global list. Therefore, there is a chance
llc_sap_find() could find a sap with zero refcnt
in this global list.
Close this race condition by checking if refcnt is zero
or not in llc_sap_find(), if it is zero then it is being
removed so we can just treat it as gone.
Reported-by: <syzbot+278893f3f7803871f7ce@syzkaller.appspotmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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With the atomic API, it is possible that a single commit affects
multiple crtcs. If the user requests an event with that commit, one
event will be sent for each CRTC, but it is not possible to distinguish
which crtc an event is for in user space. To solve this, the reserved
field in struct drm_vblank_event is repurposed to include the crtc_id
which the event is for.
The DRM_CAP_CRTC_IN_VBLANK_EVENT is added to allow userspace to query if
the crtc field will be set properly.
[daniels: Rebased, using Maarten's forward-port.]
Change-Id: I48b6b3ab4c97b20b79ebff0cb367acb1f53e95cc
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>
Cc: Maarten Lankhorst <maarten.lankhorst@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170404165221.28240-2-daniels@collabora.com
[abhinavk@codeaurora.org: resolved trivial merge conflicts]
Git-commit: 5db06a8a98f515f67446a69c57577c4c363ec65d
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
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* refs/heads/tmp-5541782
Linux 4.4.150
x86/speculation/l1tf: Exempt zeroed PTEs from inversion
Linux 4.4.149
x86/mm: Add TLB purge to free pmd/pte page interfaces
ioremap: Update pgtable free interfaces with addr
Bluetooth: hidp: buffer overflow in hidp_process_report
ASoC: Intel: cht_bsw_max98090_ti: Fix jack initialization
crypto: ablkcipher - fix crash flushing dcache in error path
crypto: blkcipher - fix crash flushing dcache in error path
crypto: vmac - separate tfm and request context
crypto: vmac - require a block cipher with 128-bit block size
kbuild: verify that $DEPMOD is installed
i2c: ismt: fix wrong device address when unmap the data buffer
kasan: don't emit builtin calls when sanitization is off
tcp: Fix missing range_truesize enlargement in the backport
x86/mm: Disable ioremap free page handling on x86-PAE
Conflicts:
Makefile
Change-Id: I9cbfedbeb3bdb1df021d4f192a2a7392010cd627
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Changes in 4.4.149
x86/mm: Disable ioremap free page handling on x86-PAE
tcp: Fix missing range_truesize enlargement in the backport
kasan: don't emit builtin calls when sanitization is off
i2c: ismt: fix wrong device address when unmap the data buffer
kbuild: verify that $DEPMOD is installed
crypto: vmac - require a block cipher with 128-bit block size
crypto: vmac - separate tfm and request context
crypto: blkcipher - fix crash flushing dcache in error path
crypto: ablkcipher - fix crash flushing dcache in error path
ASoC: Intel: cht_bsw_max98090_ti: Fix jack initialization
Bluetooth: hidp: buffer overflow in hidp_process_report
ioremap: Update pgtable free interfaces with addr
x86/mm: Add TLB purge to free pmd/pte page interfaces
Linux 4.4.149
Change-Id: I1e23095dd229992359341bda5c05e9b5b59fec45
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 785a19f9d1dd8a4ab2d0633be4656653bd3de1fc upstream.
The following kernel panic was observed on ARM64 platform due to a stale
TLB entry.
1. ioremap with 4K size, a valid pte page table is set.
2. iounmap it, its pte entry is set to 0.
3. ioremap the same address with 2M size, update its pmd entry with
a new value.
4. CPU may hit an exception because the old pmd entry is still in TLB,
which leads to a kernel panic.
Commit b6bdb7517c3d ("mm/vmalloc: add interfaces to free unmapped page
table") has addressed this panic by falling to pte mappings in the above
case on ARM64.
To support pmd mappings in all cases, TLB purge needs to be performed
in this case on ARM64.
Add a new arg, 'addr', to pud_free_pmd_page() and pmd_free_pte_page()
so that TLB purge can be added later in seprate patches.
[toshi.kani@hpe.com: merge changes, rewrite patch description]
Fixes: 28ee90fe6048 ("x86/mm: implement free pmd/pte page interfaces")
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: mhocko@suse.com
Cc: akpm@linux-foundation.org
Cc: hpa@zytor.com
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20180627141348.21777-3-toshi.kani@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bb29648102335586e9a66289a1d98a0cb392b6e5 upstream.
syzbot reported a crash in vmac_final() when multiple threads
concurrently use the same "vmac(aes)" transform through AF_ALG. The bug
is pretty fundamental: the VMAC template doesn't separate per-request
state from per-tfm (per-key) state like the other hash algorithms do,
but rather stores it all in the tfm context. That's wrong.
Also, vmac_final() incorrectly zeroes most of the state including the
derived keys and cached pseudorandom pad. Therefore, only the first
VMAC invocation with a given key calculates the correct digest.
Fix these bugs by splitting the per-tfm state from the per-request state
and using the proper init/update/final sequencing for requests.
Reproducer for the crash:
#include <linux/if_alg.h>
#include <sys/socket.h>
#include <unistd.h>
int main()
{
int fd;
struct sockaddr_alg addr = {
.salg_type = "hash",
.salg_name = "vmac(aes)",
};
char buf[256] = { 0 };
fd = socket(AF_ALG, SOCK_SEQPACKET, 0);
bind(fd, (void *)&addr, sizeof(addr));
setsockopt(fd, SOL_ALG, ALG_SET_KEY, buf, 16);
fork();
fd = accept(fd, NULL, NULL);
for (;;)
write(fd, buf, 256);
}
The immediate cause of the crash is that vmac_ctx_t.partial_size exceeds
VMAC_NHBYTES, causing vmac_final() to memset() a negative length.
Reported-by: syzbot+264bca3a6e8d645550d3@syzkaller.appspotmail.com
Fixes: f1939f7c5645 ("crypto: vmac - New hash algorithm for intel_txt support")
Cc: <stable@vger.kernel.org> # v2.6.32+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add a flag to maintain fw rejuvenate state,
set if fw rejuvenate happens and reset at fw ready.
export an API to the wlan host driver to distinguish the
case of ssr or pdr with the FW rejuventae.
Change-Id: I7a01cc4996f68f78aa13eacf36648331a701882a
Signed-off-by: Anurag Chouhan <achouhan@codeaurora.org>
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* refs/heads/tmp-f057ff9
Linux 4.4.148
x86/speculation/l1tf: Unbreak !__HAVE_ARCH_PFN_MODIFY_ALLOWED architectures
x86/init: fix build with CONFIG_SWAP=n
x86/speculation/l1tf: Fix up CPU feature flags
x86/mm/kmmio: Make the tracer robust against L1TF
x86/mm/pat: Make set_memory_np() L1TF safe
x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert
x86/speculation/l1tf: Invert all not present mappings
x86/speculation/l1tf: Fix up pte->pfn conversion for PAE
x86/speculation/l1tf: Protect PAE swap entries against L1TF
x86/cpufeatures: Add detection of L1D cache flush support.
x86/speculation/l1tf: Extend 64bit swap file size limit
x86/bugs: Move the l1tf function and define pr_fmt properly
x86/speculation/l1tf: Limit swap file size to MAX_PA/2
x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings
mm: fix cache mode tracking in vm_insert_mixed()
mm: Add vm_insert_pfn_prot()
x86/speculation/l1tf: Add sysfs reporting for l1tf
x86/speculation/l1tf: Make sure the first page is always reserved
x86/speculation/l1tf: Protect PROT_NONE PTEs against speculation
x86/speculation/l1tf: Protect swap entries against L1TF
x86/speculation/l1tf: Change order of offset/type in swap entry
mm: x86: move _PAGE_SWP_SOFT_DIRTY from bit 7 to bit 1
x86/mm: Fix swap entry comment and macro
x86/mm: Move swap offset/type up in PTE to work around erratum
x86/speculation/l1tf: Increase 32bit PAE __PHYSICAL_PAGE_SHIFT
x86/irqflags: Provide a declaration for native_save_fl
kprobes/x86: Fix %p uses in error messages
x86/speculation: Protect against userspace-userspace spectreRSB
x86/paravirt: Fix spectre-v2 mitigations for paravirt guests
ARM: dts: imx6sx: fix irq for pcie bridge
IB/ocrdma: fix out of bounds access to local buffer
IB/mlx4: Mark user MR as writable if actual virtual memory is writable
IB/core: Make testing MR flags for writability a static inline function
fix __legitimize_mnt()/mntput() race
fix mntput/mntput race
root dentries need RCU-delayed freeing
scsi: sr: Avoid that opening a CD-ROM hangs with runtime power management enabled
ACPI / LPSS: Add missing prv_offset setting for byt/cht PWM devices
xen/netfront: don't cache skb_shinfo()
parisc: Define mb() and add memory barriers to assembler unlock sequences
parisc: Enable CONFIG_MLONGCALLS by default
fork: unconditionally clear stack on fork
ipv4+ipv6: Make INET*_ESP select CRYPTO_ECHAINIV
tpm: fix race condition in tpm_common_write()
ext4: fix check to prevent initializing reserved inodes
Linux 4.4.147
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
i2c: imx: Fix reinit_completion() use
ring_buffer: tracing: Inherit the tracing setting to next ring buffer
ACPI / PCI: Bail early in acpi_pci_add_bus() if there is no ACPI handle
ext4: fix false negatives *and* false positives in ext4_check_descriptors()
netlink: Don't shift on 64 for ngroups
netlink: Don't shift with UB on nlk->ngroups
netlink: Do not subscribe to non-existent groups
nohz: Fix local_timer_softirq_pending()
genirq: Make force irq threading setup more robust
scsi: qla2xxx: Return error when TMF returns
scsi: qla2xxx: Fix ISP recovery on unload
Conflicts:
include/linux/swapfile.h
Removed CONFIG_CRYPTO_ECHAINIV from defconfig files since this upmerge is
adding this config to Kconfig file.
Change-Id: Ide96c29f919d76590c2bdccf356d1d464a892fd7
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
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Changes in 4.4.148
ext4: fix check to prevent initializing reserved inodes
tpm: fix race condition in tpm_common_write()
ipv4+ipv6: Make INET*_ESP select CRYPTO_ECHAINIV
fork: unconditionally clear stack on fork
parisc: Enable CONFIG_MLONGCALLS by default
parisc: Define mb() and add memory barriers to assembler unlock sequences
xen/netfront: don't cache skb_shinfo()
ACPI / LPSS: Add missing prv_offset setting for byt/cht PWM devices
scsi: sr: Avoid that opening a CD-ROM hangs with runtime power management enabled
root dentries need RCU-delayed freeing
fix mntput/mntput race
fix __legitimize_mnt()/mntput() race
IB/core: Make testing MR flags for writability a static inline function
IB/mlx4: Mark user MR as writable if actual virtual memory is writable
IB/ocrdma: fix out of bounds access to local buffer
ARM: dts: imx6sx: fix irq for pcie bridge
x86/paravirt: Fix spectre-v2 mitigations for paravirt guests
x86/speculation: Protect against userspace-userspace spectreRSB
kprobes/x86: Fix %p uses in error messages
x86/irqflags: Provide a declaration for native_save_fl
x86/speculation/l1tf: Increase 32bit PAE __PHYSICAL_PAGE_SHIFT
x86/mm: Move swap offset/type up in PTE to work around erratum
x86/mm: Fix swap entry comment and macro
mm: x86: move _PAGE_SWP_SOFT_DIRTY from bit 7 to bit 1
x86/speculation/l1tf: Change order of offset/type in swap entry
x86/speculation/l1tf: Protect swap entries against L1TF
x86/speculation/l1tf: Protect PROT_NONE PTEs against speculation
x86/speculation/l1tf: Make sure the first page is always reserved
x86/speculation/l1tf: Add sysfs reporting for l1tf
mm: Add vm_insert_pfn_prot()
mm: fix cache mode tracking in vm_insert_mixed()
x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings
x86/speculation/l1tf: Limit swap file size to MAX_PA/2
x86/bugs: Move the l1tf function and define pr_fmt properly
x86/speculation/l1tf: Extend 64bit swap file size limit
x86/cpufeatures: Add detection of L1D cache flush support.
x86/speculation/l1tf: Protect PAE swap entries against L1TF
x86/speculation/l1tf: Fix up pte->pfn conversion for PAE
x86/speculation/l1tf: Invert all not present mappings
x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert
x86/mm/pat: Make set_memory_np() L1TF safe
x86/mm/kmmio: Make the tracer robust against L1TF
x86/speculation/l1tf: Fix up CPU feature flags
x86/init: fix build with CONFIG_SWAP=n
x86/speculation/l1tf: Unbreak !__HAVE_ARCH_PFN_MODIFY_ALLOWED architectures
Linux 4.4.148
Change-Id: I83c857d9d9d74ee47e61d15eb411f276f057ba3d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 6c26fcd2abfe0a56bbd95271fce02df2896cfd24 upstream.
pfn_modify_allowed() and arch_has_pfn_modify_check() are outside of the
!__ASSEMBLY__ section in include/asm-generic/pgtable.h, which confuses
assembler on archs that don't have __HAVE_ARCH_PFN_MODIFY_ALLOWED (e.g.
ia64) and breaks build:
include/asm-generic/pgtable.h: Assembler messages:
include/asm-generic/pgtable.h:538: Error: Unknown opcode `static inline bool pfn_modify_allowed(unsigned long pfn,pgprot_t prot)'
include/asm-generic/pgtable.h:540: Error: Unknown opcode `return true'
include/asm-generic/pgtable.h:543: Error: Unknown opcode `static inline bool arch_has_pfn_modify_check(void)'
include/asm-generic/pgtable.h:545: Error: Unknown opcode `return false'
arch/ia64/kernel/entry.S:69: Error: `mov' does not fit into bundle
Move those two static inlines into the !__ASSEMBLY__ section so that they
don't confuse the asm build pass.
Fixes: 42e4089c7890 ("x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings")
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[groeck: Context changes]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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commit 377eeaa8e11fe815b1d07c81c4a0e2843a8c15eb upstream
For the L1TF workaround its necessary to limit the swap file size to below
MAX_PA/2, so that the higher bits of the swap offset inverted never point
to valid memory.
Add a mechanism for the architecture to override the swap file size check
in swapfile.c and add a x86 specific max swapfile check function that
enforces that limit.
The check is only enabled if the CPU is vulnerable to L1TF.
In VMs with 42bit MAX_PA the typical limit is 2TB now, on a native system
with 46bit PA it is 32TB. The limit is only per individual swap file, so
it's always possible to exceed these limits with multiple swap files or
partitions.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 42e4089c7890725fcd329999252dc489b72f2921 upstream
For L1TF PROT_NONE mappings are protected by inverting the PFN in the page
table entry. This sets the high bits in the CPU's address space, thus
making sure to point to not point an unmapped entry to valid cached memory.
Some server system BIOSes put the MMIO mappings high up in the physical
address space. If such an high mapping was mapped to unprivileged users
they could attack low memory by setting such a mapping to PROT_NONE. This
could happen through a special device driver which is not access
protected. Normal /dev/mem is of course access protected.
To avoid this forbid PROT_NONE mappings or mprotect for high MMIO mappings.
Valid page mappings are allowed because the system is then unsafe anyways.
It's not expected that users commonly use PROT_NONE on MMIO. But to
minimize any impact this is only enforced if the mapping actually refers to
a high MMIO address (defined as the MAX_PA-1 bit being set), and also skip
the check for root.
For mmaps this is straight forward and can be handled in vm_insert_pfn and
in remap_pfn_range().
For mprotect it's a bit trickier. At the point where the actual PTEs are
accessed a lot of state has been changed and it would be difficult to undo
on an error. Since this is a uncommon case use a separate early page talk
walk pass for MMIO PROT_NONE mappings that checks for this condition
early. For non MMIO and non PROT_NONE there are no changes.
[dwmw2: Backport to 4.9]
[groeck: Backport to 4.4]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1745cbc5d0dee0749a6bc0ea8e872c5db0074061 upstream
The x86 vvar vma contains pages with differing cacheability
flags. x86 currently implements this by manually inserting all
the ptes using (io_)remap_pfn_range when the vma is set up.
x86 wants to move to using .fault with VM_FAULT_NOPAGE to set up
the mappings as needed. The correct API to use to insert a pfn
in .fault is vm_insert_pfn(), but vm_insert_pfn() can't override the
vma's cache mode, and the HPET page in particular needs to be
uncached despite the fact that the rest of the VMA is cached.
Add vm_insert_pfn_prot() to support varying cacheability within
the same non-COW VMA in a more sane manner.
x86 could alternatively use multiple VMAs, but that's messy,
would break CRIU, and would create unnecessary VMAs that would
waste memory.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/d2938d1eb37be7a5e4f86182db646551f11e45aa.1451446564.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 17dbca119312b4e8173d4e25ff64262119fcef38 upstream
L1TF core kernel workarounds are cheap and normally always enabled, However
they still should be reported in sysfs if the system is vulnerable or
mitigated. Add the necessary CPU feature/bug bits.
- Extend the existing checks for Meltdowns to determine if the system is
vulnerable. All CPUs which are not vulnerable to Meltdown are also not
vulnerable to L1TF
- Check for 32bit non PAE and emit a warning as there is no practical way
for mitigation due to the limited physical address bits
- If the system has more than MAX_PA/2 physical memory the invert page
workarounds don't protect the system against the L1TF attack anymore,
because an inverted physical address will also point to valid
memory. Print a warning in this case and report that the system is
vulnerable.
Add a function which returns the PFN limit for the L1TF mitigation, which
will be used in follow up patches for sanity and range checks.
[ tglx: Renamed the CPU feature bit to L1TF_PTEINV ]
[ dwmw2: Backport to 4.9 (cpufeatures.h, E820) ]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 08bb558ac11ab944e0539e78619d7b4c356278bd upstream.
Make the MR writability flags check, which is performed in umem.c,
a static inline function in file ib_verbs.h
This allows the function to be used by low-level infiniband drivers.
Cc: <stable@vger.kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e01e80634ecdde1dd113ac43b3adad21b47f3957 upstream.
One of the classes of kernel stack content leaks[1] is exposing the
contents of prior heap or stack contents when a new process stack is
allocated. Normally, those stacks are not zeroed, and the old contents
remain in place. In the face of stack content exposure flaws, those
contents can leak to userspace.
Fixing this will make the kernel no longer vulnerable to these flaws, as
the stack will be wiped each time a stack is assigned to a new process.
There's not a meaningful change in runtime performance; it almost looks
like it provides a benefit.
Performing back-to-back kernel builds before:
Run times: 157.86 157.09 158.90 160.94 160.80
Mean: 159.12
Std Dev: 1.54
and after:
Run times: 159.31 157.34 156.71 158.15 160.81
Mean: 158.46
Std Dev: 1.46
Instead of making this a build or runtime config, Andy Lutomirski
recommended this just be enabled by default.
[1] A noisy search for many kinds of stack content leaks can be seen here:
https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=linux+kernel+stack+leak
I did some more with perf and cycle counts on running 100,000 execs of
/bin/true.
before:
Cycles: 218858861551 218853036130 214727610969 227656844122 224980542841
Mean: 221015379122.60
Std Dev: 4662486552.47
after:
Cycles: 213868945060 213119275204 211820169456 224426673259 225489986348
Mean: 217745009865.40
Std Dev: 5935559279.99
It continues to look like it's faster, though the deviation is rather
wide, but I'm not sure what I could do that would be less noisy. I'm
open to ideas!
Link: http://lkml.kernel.org/r/20180221021659.GA37073@beast
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[ Srivatsa: Backported to 4.4.y ]
Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu>
Reviewed-by: Srinidhi Rao <srinidhir@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Changes in 4.4.147
scsi: qla2xxx: Fix ISP recovery on unload
scsi: qla2xxx: Return error when TMF returns
genirq: Make force irq threading setup more robust
nohz: Fix local_timer_softirq_pending()
netlink: Do not subscribe to non-existent groups
netlink: Don't shift with UB on nlk->ngroups
netlink: Don't shift on 64 for ngroups
ext4: fix false negatives *and* false positives in ext4_check_descriptors()
ACPI / PCI: Bail early in acpi_pci_add_bus() if there is no ACPI handle
ring_buffer: tracing: Inherit the tracing setting to next ring buffer
i2c: imx: Fix reinit_completion() use
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
Linux 4.4.147
Change-Id: I067f9844278976dddef8063961a70e189c423de3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 73c8d8945505acdcbae137c2e00a1232e0be709f upstream.
Maintain the tracing on/off setting of the ring_buffer when switching
to the trace buffer snapshot.
Taking a snapshot is done by swapping the backup ring buffer
(max_tr_buffer). But since the tracing on/off setting is defined
by the ring buffer, when swapping it, the tracing on/off setting
can also be changed. This causes a strange result like below:
/sys/kernel/debug/tracing # cat tracing_on
1
/sys/kernel/debug/tracing # echo 0 > tracing_on
/sys/kernel/debug/tracing # cat tracing_on
0
/sys/kernel/debug/tracing # echo 1 > snapshot
/sys/kernel/debug/tracing # cat tracing_on
1
/sys/kernel/debug/tracing # echo 1 > snapshot
/sys/kernel/debug/tracing # cat tracing_on
0
We don't touch tracing_on, but snapshot changes tracing_on
setting each time. This is an anomaly, because user doesn't know
that each "ring_buffer" stores its own tracing-enable state and
the snapshot is done by swapping ring buffers.
Link: http://lkml.kernel.org/r/153149929558.11274.11730609978254724394.stgit@devbox
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Hiraku Toyooka <hiraku.toyooka@cybertrust.co.jp>
Cc: stable@vger.kernel.org
Fixes: debdd57f5145 ("tracing: Make a snapshot feature available from userspace")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
[ Updated commit log and comment in the code ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The ADSP asm session ids are managed by the kernel driver. It's all right
for native use cases. But for virtualization use cases, there's no way to
synchronize the session ids' status among virtual machines. Playing back
in one virtual machine is probably failed, because the session id may had
been occupied by a use case in another virtual machine.
The patch allowed audio capture stream and loopback stream to try all
available session ids in case of session id conflict error, to support
concurrent playback from multiple virtual machines.
Change-Id: I01b4da65f3e5716dd14c20c614b53f3c45dd9ea3
Signed-off-by: Erin Yan <xinyey@codeaurora.org>
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