mm/mempolicy: fix get_nodes out of bound access
authorTianyu Li <tianyu.li@arm.com>
Wed, 1 Jun 2022 09:32:11 +0000 (17:32 +0800)
committerakpm <akpm@linux-foundation.org>
Mon, 4 Jul 2022 01:08:39 +0000 (18:08 -0700)
commit000eca5d044d1ee23b4ca311793cf3fc528da6c6
treec7c6c6574409f06dd8fc55becb3ca855dcfc4516
parent8edaec0756005a3f286c9272e909dff07d12cf75
mm/mempolicy: fix get_nodes out of bound access

When user specified more nodes than supported, get_nodes will access nmask
array out of bounds.

Link: https://lkml.kernel.org/r/20220601093211.2970565-1-tianyu.li@arm.com
Fixes: e130242dc351 ("mm: simplify compat numa syscalls")
Signed-off-by: Tianyu Li <tianyu.li@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/mempolicy.c