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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-29 14:40:43 +0800
committerakpm <akpm@linux-foundation.org>2022-05-27 09:33:43 -0700
commit4c6bdb36408fbe4697eb9f1d95a3ddc1d2348448 (patch)
tree3022529a6420694abb376108a463c490bfe1de61 /mm/z3fold.c
parent86d28b0709279ccc636ef9ba267b7f3bcef79a4b (diff)
mm/z3fold: fix sheduling while atomic
Patch series "A few fixup patches for z3fold". This series contains a few fixup patches to fix sheduling while atomic, fix possible null pointer dereferencing, fix various race conditions and so on. More details can be found in the respective changelogs. This patch (of 9): z3fold's page_lock is always held when calling alloc_slots. So gfp should be GFP_ATOMIC to avoid "scheduling while atomic" bug. Link: https://lkml.kernel.org/r/20220429064051.61552-1-linmiaohe@huawei.com Link: https://lkml.kernel.org/r/20220429064051.61552-2-linmiaohe@huawei.com Fixes: fc5488651c7d ("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>
Diffstat (limited to 'mm/z3fold.c')
-rw-r--r--mm/z3fold.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/z3fold.c b/mm/z3fold.c
index 83b5a3514427..c2260f5a5885 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -941,8 +941,7 @@ lookup:
}
if (zhdr && !zhdr->slots)
- zhdr->slots = alloc_slots(pool,
- can_sleep ? GFP_NOIO : GFP_ATOMIC);
+ zhdr->slots = alloc_slots(pool, GFP_ATOMIC);
return zhdr;
}