Re: [PATCH v3] mm/shmem: fix THP allocation and fallback loop

On 2025/10/23 14:59, Kairui Song wrote:

From: Kairui Song kasong@tencent.com

The order check and fallback loop is updating the index value on every loop, this will cause the index to be wrongly aligned by a larger value while the loop shrinks the order.

This may result in inserting and returning a folio of the wrong index and cause data corruption with some userspace workloads [1].

Cc: stable@vger.kernel.org Link: https://lore.kernel.org/linux-mm/CAMgjq7DqgAmj25nDUwwu1U2cSGSn8n4-Hqpgottedy... [1] Fixes: e7a2ab7b3bb5d ("mm: shmem: add mTHP support for anonymous shmem") Signed-off-by: Kairui Song kasong@tencent.com

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LGTM. Thanks. Reviewed-by: Baolin Wang baolin.wang@linux.alibaba.com