mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()
syzbot is reporting uninit-value at shrinker_alloc(), for commit307bececcd
("mm: shrinker: add a secondary array for shrinker_info::{map, nr_deferred}") which assumed that the ->unit was allocated with __GFP_ZERO forgot to replace kvmalloc_node() in expand_one_shrinker_info() with kvzalloc_node(). Link: https://lkml.kernel.org/r/9226cc0a-10e0-4489-80c5-58c3b5b4359c@I-love.SAKURA.ne.jp Reported-by: syzbot <syzbot+1e0ed05798af62917464@syzkaller.appspotmail.com> Closes: https://syzkaller.appspot.com/bug?extid=1e0ed05798af62917464 Fixes:307bececcd
("mm: shrinker: add a secondary array for shrinker_info::{map, nr_deferred}") Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -126,7 +126,7 @@ static int expand_one_shrinker_info(struct mem_cgroup *memcg, int new_size,
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if (new_nr_max <= old->map_nr_max)
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continue;
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new = kvmalloc_node(sizeof(*new) + new_size, GFP_KERNEL, nid);
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new = kvzalloc_node(sizeof(*new) + new_size, GFP_KERNEL, nid);
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if (!new)
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return -ENOMEM;
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