Re: [PATCH] f2fs: fix several potential integer overflows in file offsets

On 2024/7/25 1:28, Nikita Zhandarovich wrote:

When dealing with large extents and calculating file offsets by summing up according extent offsets and lengths of unsigned int type, one may encounter possible integer overflow if the values are big enough.

Prevent this from happening by expanding one of the addends to (pgoff_t) type.

Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.

Fixes: d323d005ac4a ("f2fs: support file defragment") Cc: stable@vger.kernel.org Signed-off-by: Nikita Zhandarovich n.zhandarovich@fintech.ru

Reviewed-by: Chao Yu chao@kernel.org

Thanks,