Dan Carpenter 7091fcc75f zram: off by one in read_block_state() ...

[ Upstream commit a88e03cf3d190cf46bc4063a9b7efe87590de5f4 ]

snprintf() returns the number of bytes it would have printed if there
were space.  But it does not count the NUL terminator.  So that means
that if "count == copied" then this has already overflowed by one
character.

This bug likely isn't super harmful in real life.

Link: https://lkml.kernel.org/r/20210916130404.GA25094@kili
Fixes: c0265342bff4 ("zram: introduce zram memory tracking")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-11-18 14:04:27 +01:00

..

Kconfig

docs: blockdev: add it to the admin-guide

2019-07-15 11:03:01 -03:00

Makefile

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21 10:50:46 +02:00

zcomp.c

zcomp: Use ARRAY_SIZE() for backends list

2020-06-04 19:06:24 -07:00

zcomp.h

zram: Use local lock to protect per-CPU data

2020-05-28 10:31:10 +02:00

zram_drv.c

zram: off by one in read_block_state()

2021-11-18 14:04:27 +01:00

zram_drv.h

zram: idle writeback fixes and cleanup

2019-01-08 17:15:10 -08:00