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Minchan Kim ae94264ed4 zram: fix null dereference of handle 
In testing I found handle passed to zs_map_object in __zram_bvec_read is
NULL so eh kernel goes oops in pin_object().

The reason is there is no routine to check the slot's freeing after
getting the slot's lock.  This patch fixes it.

[minchan@kernel.org: v2]
  Link: http://lkml.kernel.org/r/1505887347-10881-1-git-send-email-minchan@kernel.org
Link: http://lkml.kernel.org/r/1505788488-26723-1-git-send-email-minchan@kernel.org
Fixes: 1f7319c742 ("zram: partial IO refactoring")
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky.work@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>
 		2017-10-03 17:54:24 -07:00
..
aoe block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
drbd drbd: remove BIOSET_NEED_RESCUER flag from drbd_{md_,}io_bio_set 2017-08-30 08:10:02 -06:00
mtip32xx Merge branch 'nvme-4.13' of git://git.infradead.org/nvme into for-linus 2017-07-10 11:44:34 -06:00
paride block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
rsxx block: pass in queue to inflight accounting 2017-08-09 13:09:16 -06:00
xen-blkback Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
zram zram: fix null dereference of handle 2017-10-03 17:54:24 -07:00
DAC960.c block: DAC960: shut up format-overflow warning 2017-07-29 09:00:03 -06:00
DAC960.h
…
Kconfig SCSI misc on 20170907 2017-09-07 21:11:05 -07:00
Makefile scsi: cciss: Drop obsolete driver 2017-08-24 22:28:57 -04:00
amiflop.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
ataflop.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
brd.c brd: fix overflow in __brd_direct_access 2017-09-25 08:56:05 -06:00
cryptoloop.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
floppy.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
loop.c Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
loop.h loop: remove union of use_aio and ref in struct loop_cmd 2017-09-25 08:56:05 -06:00
nbd.c nbd: ignore non-nbd ioctl's 2017-09-25 08:56:05 -06:00
null_blk.c Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
pktcdvd.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
ps3disk.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
ps3vram.c block/ps3vram: Check return of ps3vram_cache_init 2017-08-17 23:03:44 +10:00
rbd.c rbd: silence bogus uninitialized use warning in rbd_acquire_lock() 2017-09-06 19:56:42 +02:00
rbd_types.h rbd: RBD_V{1,2}_DATA_FORMAT macros 2017-02-20 12:16:15 +01:00
skd_main.c skd: Let the block layer core choose .nr_requests 2017-08-29 09:43:06 -06:00
skd_s1120.h skd: Use __packed only when needed 2017-08-18 08:45:29 -06:00
smart1,2.h
…
sunvdc.c sunvdc: prevent sunvdc panic when mpgroup disk added to guest domain 2017-08-09 22:22:32 -07:00
swim.c block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
swim3.c block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
swim_asm.S
…
sx8.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
umem.c blk: remove bio_set arg from blk_queue_split() 2017-06-18 12:40:59 -06:00
umem.h
…
virtio_blk.c Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
xen-blkfront.c Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
xsysace.c block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
z2ram.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00