Jiang Liu c181b46430 zram: protect sysfs handler from invalid memory access ...

commit 5863e10b44 upstream.

Use zram->init_lock to protect access to zram->meta, otherwise it
may cause invalid memory access if zram->meta has been freed by
zram_reset_device().

This issue may be triggered by:
Thread 1:
while true; do cat mem_used_total; done
Thread 2:
while true; do echo 8M > disksize; echo 1 > reset; done

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-08-11 18:35:24 -07:00

..

Kconfig

staging: Add angle bracket before and after the URL

2013-01-07 14:56:04 -08:00

Makefile

staging: zram: replace xvmalloc with zsmalloc

2012-02-08 17:13:00 -08:00

zram_drv.c

zram: avoid access beyond the zram device

2013-08-11 18:35:24 -07:00

zram_drv.h

zram: use zram->lock to protect zram_free_page() in swap free notify path

2013-08-11 18:35:23 -07:00

zram_sysfs.c

zram: protect sysfs handler from invalid memory access

2013-08-11 18:35:24 -07:00

zram.txt

zram: force disksize setting before using zram

2013-02-03 17:52:49 -08:00