Weijie Yang 340eb9b208 zram: avoid kunmap_atomic() of a NULL pointer ...

commit c406515239 upstream.

zram could kunmap_atomic() a NULL pointer in a rare situation: a zram
page becomes a full-zeroed page after a partial write io.  The current
code doesn't handle this case and performs kunmap_atomic() on a NULL
pointer, which panics the kernel.

This patch fixes this issue.

Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Weijie Yang <weijie.yang.kh@gmail.com>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-11-21 09:23:00 -08:00

..

aoe

mm: close PageTail race

2014-03-04 07:55:47 -08:00

drbd

drbd: compute the end before rb_insert_augmented()

2014-11-14 08:59:51 -08:00

mtip32xx

mtip32xx: Remove dfs_parent after pci unregister

2014-07-06 18:57:26 -07:00

paride

drivers/block/paride/pg.c: underflow bug in pg_write()

2014-01-21 20:16:56 -08:00

rsxx

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

xen-blkback

xen-blkback: fix leak on grant map error path

2014-11-14 08:59:51 -08:00

zram

zram: avoid kunmap_atomic() of a NULL pointer

2014-11-21 09:23:00 -08:00

amiflop.c

tree-wide: use reinit_completion instead of INIT_COMPLETION

2013-11-15 09:32:21 +09:00

ataflop.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

brd.c

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

cciss_cmd.h

cciss: use new doorbell-bit-5 reset method

2011-05-06 08:23:55 -06:00

cciss_scsi.c

cciss: switch to ->show_info()

2013-04-09 14:13:19 -04:00

cciss_scsi.h

cciss: add cciss_tape_cmds module paramter

2011-05-06 08:23:59 -06:00

cciss.c

drivers/block/cciss.c:cciss_init_one(): use proper errnos

2014-01-21 20:16:56 -08:00

cciss.h

cciss: Adds simple mode functionality

2011-08-08 11:40:15 +02:00

cpqarray.c

cpqarray: fix info leak in ida_locked_ioctl()

2013-09-24 17:00:26 -07:00

cpqarray.h

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

cryptoloop.c

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

DAC960.c

procfs: new helper - PDE_DATA(inode)

2013-04-09 14:13:32 -04:00

DAC960.h

Fix DAC960 driver on machines which don't support 64-bit DMA

2007-09-11 17:21:19 -07:00

floppy.c

floppy: don't write kernel-only members to FDRAWCMD ioctl output

2014-05-13 13:32:47 +02:00

hd.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

ida_cmd.h

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

ida_ioctl.h

Linux-2.6.12-rc2

2005-04-16 15:20:36 -07:00

Kconfig

zram: promote zram from staging

2014-01-30 16:56:55 -08:00

loop.c

drivers/block/loop.c: fix comment typo in loop_config_discard

2014-01-21 20:16:56 -08:00

loop.h

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

Makefile

zram: promote zram from staging

2014-01-30 16:56:55 -08:00

mg_disk.c

mg_disk: Spelling s/finised/finished/

2014-01-21 20:34:58 -08:00

nbd.c

block: Immutable bio vecs

2013-11-23 22:33:49 -08:00

null_blk.c

null_blk: use blk_complete_request and blk_mq_complete_request

2014-02-10 09:27:31 -07:00

nvme-core.c

Merge git://git.infradead.org/users/willy/linux-nvme

2014-02-05 15:53:26 -08:00

nvme-scsi.c

NVMe: compat SG_IO ioctl

2013-12-16 15:49:40 -05:00

osdblk.c

block: replace strict_strtoul() with kstrtoul()

2013-09-11 15:56:56 -07:00

pktcdvd.c

pktcdvd: fix error return code

2014-01-03 10:05:34 +01:00

ps3disk.c

block: Kill bio_segments()/bi_vcnt usage

2013-11-23 22:33:51 -08:00

ps3vram.c

block: Convert bio_for_each_segment() to bvec_iter

2013-11-23 22:33:49 -08:00

rbd_types.h

rbd: get rid of RBD_MAX_SEG_NAME_LEN

2012-12-17 08:37:29 -06:00

rbd.c

rbd: Fix error recovery in rbd_obj_read_sync()

2014-11-14 09:00:12 -08:00

skd_main.c

drivers: block: Mark the functions as static in skd_main.c

2013-12-19 08:06:49 -07:00

skd_s1120.h

skd: fix formatting in skd_s1120.h

2013-11-08 09:10:30 -07:00

smart1,2.h

fix typos 'comamnd' -> 'command' in comments

2011-02-02 11:31:21 +01:00

sunvdc.c

sunvdc: don't call VD_OP_GET_VTOC

2014-11-21 09:23:00 -08:00

swim3.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

swim_asm.S

m68k: mac - Add SWIM floppy support

2009-03-26 21:15:27 +01:00

swim.c

drivers/block/swim.c: remove unnecessary platform_set_drvdata()

2013-09-11 15:56:59 -07:00

sx8.c

drivers/block/sx8.c: remove unnecessary pci_set_drvdata()

2014-01-21 20:16:56 -08:00

umem.c

block: Convert drivers to immutable biovecs

2013-11-23 22:33:51 -08:00

umem.h

drivers/block/umem: trim trailing whitespace

2007-10-10 09:25:59 +02:00

virtio_blk.c

virtio_blk: fix race between start and stop queue

2014-06-11 11:54:10 -07:00

xen-blkfront.c

Merge branch 'stable/for-jens-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip into for-linus

2014-02-10 12:52:34 -07:00

xsysace.c

xilinx systemace: Fix sparse warnings

2013-07-10 07:47:12 +02:00

z2ram.c

block/z2ram: Remove duplicate external declarations

2013-11-26 11:09:10 +01:00