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OpenCloudOS-Kernel
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Minchan Kim d72e9a7a93 zram: do not use copy_page with non-page aligned address 
The copy_page is optimized memcpy for page-alinged address.  If it is
used with non-page aligned address, it can corrupt memory which means
system corruption.  With zram, it can happen with

1. 64K architecture
2. partial IO
3. slub debug

Partial IO need to allocate a page and zram allocates it via kmalloc.
With slub debug, kmalloc(PAGE_SIZE) doesn't return page-size aligned
address.  And finally, copy_page(mem, cmem) corrupts memory.

So, this patch changes it to memcpy.

Actuaully, we don't need to change zram_bvec_write part because zsmalloc
returns page-aligned address in case of PAGE_SIZE class but it's not
good to rely on the internal of zsmalloc.

Note:
 When this patch is merged to stable, clear_page should be fixed, too.
 Unfortunately, recent zram removes it by "same page merge" feature so
 it's hard to backport this patch to -stable tree.

I will handle it when I receive the mail from stable tree maintainer to
merge this patch to backport.

Fixes: 42e99bd ("zram: optimize memory operations with clear_page()/copy_page()")
Link: http://lkml.kernel.org/r/1492042622-12074-2-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2017-04-13 18:24:21 -07:00
..
accessibility
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acpi Merge branch 'acpi-scan-fixes' 2017-04-07 13:48:26 +02:00
amba
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android sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
ata sata_via: Enable hotplug only on VT6421 2017-04-11 09:12:18 +09:00
atm sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
auxdisplay auxdisplay: img-ascii-lcd: add missing sentinel entry in img_ascii_lcd_matches 2017-03-16 16:59:55 +09:00
base drivers core: remove assert_held_device_hotplug() 2017-03-16 16:56:19 -07:00
bcma
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block zram: do not use copy_page with non-page aligned address 2017-04-13 18:24:21 -07:00
bluetooth Bluetooth: btqcomsmd: fix compile-test dependency 2017-03-22 19:22:04 -07:00
bus ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
cdrom Merge branch 'for-4.11/next' into for-4.11/linus-merge 2017-02-17 14:08:19 -07:00
char Char/Misc driver fixes for 4.11-rc4 2017-03-26 11:15:54 -07:00
clk Allwinner clock fixes for 4.11 2017-03-23 16:08:46 -07:00
clocksource Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:22:03 -07:00
connector
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cpufreq Merge branches 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes' 2017-03-31 23:00:53 +02:00
cpuidle cpuidle: powernv: Pass correct drv->cpumask for registration 2017-03-29 22:55:36 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-04-10 09:37:43 -07:00
dax device-dax: fix debug output typo 2017-03-10 19:56:56 -08:00
dca
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devfreq scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
dio
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dma dmaengine: Fix array index out of bounds warning in __get_unmap_pool() 2017-03-14 10:11:27 +05:30
dma-buf sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
edac EDAC, pnd2_edac: Fix reported DIMM number 2017-03-26 09:36:28 +02:00
eisa
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extcon extcon: int3496: Set the id pin to direction-input if necessary 2017-03-22 18:29:48 +09:00
firewire Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
firmware efi/esrt: Cleanup bad memory map log messages 2017-03-17 18:53:12 +00:00
fmc
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fpga fpga zynq: Use the scatterlist interface 2017-02-10 15:20:44 +01:00
fsi drivers/fsi: add driver to device matches 2017-02-10 15:19:48 +01:00
gpio ACPI / gpio: do not fall back to parsing _CRS when we get a deferral 2017-03-30 11:08:46 +02:00
gpu Merge branch 'linux-4.11' of git://github.com/skeggsb/linux into drm-fixes 2017-04-13 09:56:05 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2017-04-11 23:35:14 -07:00
hsi sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
hv Drivers: hv: vmbus: Don't leak memory when a channel is rescinded 2017-03-16 16:42:33 +09:00
hwmon hwmon: (asus_atk0110) fix uninitialized data access 2017-03-23 12:01:57 -07:00
hwspinlock
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hwtracing intel_th: pci: Add Gemini Lake support 2017-03-15 14:55:18 +02:00
i2c i2c: mux: pca954x: Add missing pca9546 definition to chip_desc 2017-03-24 12:22:18 +01:00
ide sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
idle Power management turbostat utility updates for v4.11-rc1 2017-03-02 17:41:27 -08:00
iio iio: hid-sensor-attributes: Fix sensor property setting failure. 2017-04-02 11:44:03 +01:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2017-04-11 23:51:58 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-03-23 19:51:06 -07:00
iommu Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes 2017-03-22 23:59:56 +01:00
ipack
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irqchip irqchip fixes for 4.11-rc5 2017-03-31 16:54:48 +02:00
isdn isdn: kcapi: avoid uninitialized data 2017-03-28 17:59:33 -07:00
leds sched/headers: Prepare for new header dependencies before moving code to <linux/sched/loadavg.h> 2017-03-02 08:42:27 +01:00
lguest sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
lightnvm lightnvm: set default lun range when no luns are specified 2017-02-15 08:27:21 -07:00
macintosh powerpc/pmac: Fix crash in dma-mapping.h with NULL dma_ops 2017-03-10 14:17:23 +11:00
mailbox sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
mcb
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md Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2017-04-08 11:56:58 -07:00
media media fixes for v4.11-rc4 2017-03-24 13:34:16 -07:00
memory Linux 4.11-rc1 2017-03-06 08:37:53 -08:00
memstick Merge branch 'for-4.11/next' into for-4.11/linus-merge 2017-02-17 14:08:19 -07:00
message SCSI misc on 20170220 2017-02-21 11:51:42 -08:00
mfd staging/iio driver patches for 4.11-rc1 2017-02-22 12:14:01 -08:00
misc Char/Misc driver fixes for 4.11-rc4 2017-03-26 11:15:54 -07:00
mmc mmc: sdhci-of-at91: fix MMC_DDR_52 timing selection 2017-03-30 21:10:29 +02:00
mtd scripts/spelling.txt: add "disble(d)" pattern and fix typo instances 2017-03-09 17:01:09 -08:00
net nfp: fix potential use after free on xdp prog 2017-04-05 18:46:40 -07:00
nfc scripts/spelling.txt: add "omited" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
ntb ntb: ntb_hw_intel: link_poll isn't clearing the pending status properly 2017-02-16 23:11:26 -05:00
nubus
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nvdimm nfit, libnvdimm: fix interleave set cookie calculation 2017-03-01 00:49:42 -08:00
nvme nvmet: fix byte swap in nvmet_parse_io_cmd 2017-04-02 10:24:15 +03:00
nvmem
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of DeviceTree updates for 4.11: 2017-02-22 19:23:14 -08:00
oprofile sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h> 2017-03-02 08:42:40 +01:00
parisc Merge branch 'parisc-4.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2017-03-03 16:20:06 -08:00
parport parport: fix attempt to write duplicate procfiles 2017-03-16 17:32:21 +09:00
pci PCI: dwc: Fix dw_pcie_ops NULL pointer dereference 2017-04-04 08:24:25 -05:00
pcmcia
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perf sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
phy phy: qcom-usb-hs: Add depends on EXTCON 2017-03-09 15:29:57 +05:30
pinctrl pinctrl: cherryview: Add a quirk to make Acer Chromebook keyboard work again 2017-04-11 10:09:39 +02:00
platform platform-drivers-x86 for v4.11-2 2017-03-13 13:23:43 -07:00
pnp
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power scripts/spelling.txt: add "intialization" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
powercap
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pps
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ps3 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
ptp PTP: fix ptr_ret.cocci warnings 2017-03-20 16:25:06 +01:00
pwm pwm: rockchip: State of PWM clock should synchronize with PWM enabled state 2017-04-06 15:08:52 +02:00
rapidio drivers/rapidio/devices/tsi721.c: make module parameter variable name unique 2017-03-31 17:13:30 -07:00
ras
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regulator regulator: Updates for v4.11 2017-02-20 17:23:57 -08:00
remoteproc remoteproc: qcom: fix QCOM_SMD dependencies 2017-03-20 14:45:44 -07:00
reset ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
rpmsg virtio, vhost: optimizations, fixes 2017-03-02 13:53:13 -08:00
rtc sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-05 20:17:38 -07:00
sbus
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scsi Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2017-04-08 11:56:58 -07:00
sfi
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sh
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sn
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soc sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
spi sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h> 2017-03-02 08:42:27 +01:00
spmi
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ssb
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staging staging: android: ashmem: lseek failed due to no FMODE_LSEEK. 2017-04-08 12:13:11 +02:00
target tcmu: Skip Data-Out blocks before gathering Data-In buffer for BIDI case 2017-04-02 16:18:51 -07:00
tc
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thermal thermal: cpu_cooling: Check OPP for errors 2017-03-13 10:06:55 +08:00
thunderbolt
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tty Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:25:10 -07:00
uio sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2017-04-11 23:51:58 -07:00
uwb uwb: i1480-dfu: fix NULL-deref at probe 2017-03-14 17:07:31 +08:00
vfio VFIO fixes for v4.11-rc4 2017-03-24 14:39:36 -07:00
vhost vhost-vsock: add pkt cancel capability 2017-03-21 14:41:46 -07:00
video sched/headers: Remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-03 01:45:16 +01:00
virt
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virtio virtio_balloon: prevent uninitialized variable use 2017-03-28 20:41:28 +03:00
vlynq
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vme
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w1 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
watchdog watchdog: retu: restore MFD dependency 2017-03-01 06:15:10 -08:00
xen xenbus: remove transaction holder from list before freeing 2017-04-04 10:11:06 -04:00
zorro
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Kconfig drivers/fsi: Add empty fsi bus definitions 2017-02-10 15:19:48 +01:00
Makefile pci-v4.11-changes 2017-02-23 11:53:22 -08:00