Weijie Yang 5a99e95b8d zram: avoid NULL pointer access in concurrent situation ... There is a rare NULL pointer bug in mem_used_total_show() and mem_used_max_store() in concurrent situation, like this: zram is not initialized, process A is a mem_used_total reader which runs periodically, while process B try to init zram. process A process B access meta, get a NULL value init zram, done init_done() is true access meta->mem_pool, get a NULL pointer BUG This patch fixes this issue. Signed-off-by: Weijie Yang <weijie.yang@samsung.com> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-10-29 16:33:15 -07:00
..
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_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
zcomp.c	zram: use scnprintf() in attrs show() methods	2014-04-07 16:36:02 -07:00
zcomp.h	zram: propagate error to user	2014-04-07 16:36:02 -07:00
zram_drv.c	zram: avoid NULL pointer access in concurrent situation	2014-10-29 16:33:15 -07:00
zram_drv.h	zram: report maximum used memory	2014-10-09 22:26:02 -04:00