Weijie Yang c406515239 zram: avoid kunmap_atomic() of a NULL pointer ... 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> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-11-13 16:17:05 -08:00
..
aoe	mm: close PageTail race	2014-03-04 07:55:47 -08:00
drbd	drbd: use RB_DECLARE_CALLBACKS() to define augment callbacks	2014-09-18 09:00:17 -06:00
mtip32xx	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
paride	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
rsxx	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
xen-blkback	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
zram	zram: avoid kunmap_atomic() of a NULL pointer	2014-11-13 16:17:05 -08:00
amiflop.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
ataflop.c	Merge branch 'for-3.16/core' of git://git.kernel.dk/linux-block into next	2014-06-02 09:29:34 -07:00
brd.c	brd: add ram disk visibility option	2014-08-21 20:42:01 -05:00
cciss_cmd.h
cciss_scsi.c	cciss: switch to ->show_info()	2013-04-09 14:13:19 -04:00
cciss_scsi.h
cciss.c	block: use pci_zalloc_consistent	2014-08-08 15:57:28 -07:00
cciss.h
cpqarray.c	cpqarray: fix info leak in ida_locked_ioctl()	2013-09-24 17:00:26 -07:00
cpqarray.h
cryptoloop.c	move linux/loop.h to drivers/block	2013-06-29 12:46:45 +04:00
DAC960.c	block: use pci_zalloc_consistent	2014-08-08 15:57:28 -07:00
DAC960.h
floppy.c	Merge branch 'for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/linux-block into for-linus	2014-06-18 10:30:22 -07:00
hd.c	block: hd: remove deprecated IRQF_DISABLED	2014-10-01 08:16:07 -06:00
ida_cmd.h
ida_ioctl.h
Kconfig	zram: promote zram from staging	2014-01-30 16:56:55 -08:00
loop.c	Merge branch 'sched/urgent' into sched/core, to avoid conflicts	2014-05-07 13:15:46 +02:00
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	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
nbd.c	block: disable entropy contributions for nonrot devices	2014-10-04 10:55:32 -06:00
null_blk.c	null_blk: Cleanup error recovery in null_add_dev()	2014-10-22 07:59:25 -06:00
nvme-core.c	block: disable entropy contributions for nonrot devices	2014-10-04 10:55:32 -06:00
nvme-scsi.c	NVMe: Fix START_STOP_UNIT Scsi->NVMe translation.	2014-06-13 13:11:00 -04:00
osdblk.c	block: replace strict_strtoul() with kstrtoul()	2013-09-11 15:56:56 -07:00
pktcdvd.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
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()	2014-10-30 13:11:51 +03:00
skd_main.c	block: disable entropy contributions for nonrot devices	2014-10-04 10:55:32 -06:00
skd_s1120.h	skd: fix formatting in skd_s1120.h	2013-11-08 09:10:30 -07:00
smart1,2.h
sunvdc.c	sunvdc: don't call VD_OP_GET_VTOC	2014-10-31 15:49:45 -04:00
swim3.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
swim_asm.S
swim.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
sx8.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
umem.c	block: Convert drivers to immutable biovecs	2013-11-23 22:33:51 -08:00
umem.h
virtio_blk.c	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
xen-blkfront.c	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
xsysace.c	block: systemace: Remove .owner field for driver	2014-08-21 20:37:54 -05:00
z2ram.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00