[lvc-project] [PATCH] f2fs: fix several potential integer overflows in file offsets

[Chao Yu]

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 at vger.kernel.org
> Signed-off-by: Nikita Zhandarovich <n.zhandarovich at fintech.ru>

Reviewed-by: Chao Yu <chao at kernel.org>

Thanks,