Re: [PATCH v2] ovl: reject lowerdir ending with unescaped backslash

[Christian Brauner]

On Mon, 12 Oct 2026 17:55:38 +0800, Guanglei Zhu wrote:
> In ovl_parse_param_split_lowerdirs() a backslash consumes the
> character that follows it.  When the backslash is the last character
> of the lowerdir value, it consumes the NUL terminator: the loop exits
> normally and the backslash is kept in the output, so the lowerdir is
> passed downstream with a trailing backslash and the mount fails later
> with a confusing ENOENT from path lookup.
> 
> [...]

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] ovl: reject lowerdir ending with unescaped backslash
      https://git.kernel.org/vfs/vfs/c/81f4be14beee