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linux/drivers/block/zram
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Luis Henriques 6e3105d5b2 zram: fix possible use after free in zcomp_create() 
commit 3aaf14da80 upstream.

zcomp_create() verifies the success of zcomp_strm_{multi,single}_create()
through comp->stream, which can potentially be pointing to memory that
was freed if these functions returned an error.

While at it, replace a 'ERR_PTR(-ENOMEM)' by a more generic
'ERR_PTR(error)' as in the future zcomp_strm_{multi,siggle}_create()
could return other error codes.  Function documentation updated
accordingly.

Fixes: beca3ec71f ("zram: add multi stream functionality")
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
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>
History 2015-10-03 13:49:18 +02:00
..
Kconfig zram: add lz4 algorithm backend 2014-04-07 16:36:01 -07:00
Makefile zram: add lz4 algorithm backend 2014-04-07 16:36:01 -07:00
zcomp.c zram: fix possible use after free in zcomp_create() 2015-10-03 13:49:18 +02:00
zcomp.h zram: propagate error to user 2014-04-07 16:36:02 -07:00
zcomp_lz4.c zram: add lz4 algorithm backend 2014-04-07 16:36:01 -07:00
zcomp_lz4.h zram: add lz4 algorithm backend 2014-04-07 16:36:01 -07:00
zcomp_lzo.c zram: introduce compressing backend abstraction 2014-04-07 16:36:01 -07:00
zcomp_lzo.h zram: introduce compressing backend abstraction 2014-04-07 16:36:01 -07:00
zram_drv.c zram: clear disk io accounting when reset zram device 2015-06-10 16:43:43 -07:00
zram_drv.h zram: support compaction 2015-04-15 16:35:21 -07:00