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linux/drivers/block/zram
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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>
History 2017-10-03 17:54:24 -07:00
..
Kconfig zram: add config and doc file for writeback feature 2017-09-06 17:27:25 -07:00
Makefile zram: delete custom lzo/lz4 2016-07-26 16:19:19 -07:00
zcomp.c zram: use __sysfs_match_string() helper 2017-07-10 16:32:31 -07:00
zcomp.h zram: Convert to hotplug state machine 2016-12-02 00:52:39 +01:00
zram_drv.c zram: fix null dereference of handle 2017-10-03 17:54:24 -07:00
zram_drv.h zram: write incompressible pages to backing device 2017-09-06 17:27:25 -07:00