Re: [PATCH] fs: clamp FIONREAD result to int range

[Christian Brauner]

On Sat, 31 Oct 2026 09:22:09 +0200, Avi Weiss wrote:
> FIONREAD returns the difference between the file size and the current
> position in an int. When the difference is outside the int range, the
> result wraps, so a file with 4 GiB remaining can be reported as empty.
> 
> Clamp the result to the signed int range before returning it to userspace.
> Preserve negative counts for file positions past EOF.
> 
> [...]

Applied to the vfs.fixes branch of the vfs/vfs.git tree.
Patches in the vfs.fixes branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.fixes

[1/1] fs: clamp FIONREAD result to int range
      https://git.kernel.org/vfs/vfs/c/f5ced3af5fa1