git.baikalelectronics.ru Git - kernel.git/commit

author	Miaohe Lin <linmiaohe@huawei.com>
	Fri, 29 Apr 2022 06:40:43 +0000 (14:40 +0800)
committer	akpm <akpm@linux-foundation.org>
	Fri, 27 May 2022 16:33:43 +0000 (09:33 -0700)
commit	afb1bd8ed1bef8cb55b2ea34e75093f6268a1d60
tree	d062095fadf78cede1c32b05ceb42f05ad98d234	tree \| snapshot
parent	b2267dd49a6df0bd385cedad62e236d454e01a95	commit \| diff

mm/z3fold: fix possible null pointer dereferencing

alloc_slots could fail to allocate memory under heavy memory pressure. So
we should check zhdr->slots against NULL to avoid future null pointer
dereferencing.

Link: https://lkml.kernel.org/r/20220429064051.61552-3-linmiaohe@huawei.com
Fixes: 8836913fa54b ("z3fold: simplify freeing slots")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>