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| author | zijun_hu <zijun_hu@htc.com> | 2016-08-04 22:32:00 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-05 00:02:09 (GMT) |
| commit | e47608ab6dbe63fefe60c211a30b3fc78a1b5d5e (patch) | |
| tree | e1b92f9ab8517f8be2f4faf673b97606acb5584a /fs/ext4/ext4_jbd2.h | |
| parent | 4b16b0c0bf416de61d14ac31703883d76395ed5f (diff) | |
| download | linux-e47608ab6dbe63fefe60c211a30b3fc78a1b5d5e.tar.xz | |
mm/memblock.c: fix NULL dereference error
It causes NULL dereference error and failure to get type_a->regions[0]
info if parameter type_b of __next_mem_range_rev() == NULL
Fix this by checking before dereferring and initializing idx_b to 0
The approach is tested by dumping all types of region via
__memblock_dump_all() and __next_mem_range_rev() fixed to UART
separately the result is okay after checking the logs.
Link: http://lkml.kernel.org/r/57A0320D.6070102@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Tested-by: zijun_hu <zijun_hu@htc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ext4/ext4_jbd2.h')
0 files changed, 0 insertions, 0 deletions