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authorzijun_hu <zijun_hu@htc.com>2016-08-04 15:32:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-04 20:02:09 -0400
commite47608ab6dbe63fefe60c211a30b3fc78a1b5d5e (patch)
treee1b92f9ab8517f8be2f4faf673b97606acb5584a /MAINTAINERS
parent4b16b0c0bf416de61d14ac31703883d76395ed5f (diff)
downloadlinux-stericsson-e47608ab6dbe63fefe60c211a30b3fc78a1b5d5e.tar.gz
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>
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