[PATCH] fuse: fix conversion of fuse_reverse_inval_entry() to start_removing()

[Christian Brauner]

On Mon, 01 Dec 2025 09:06:18 +1100, NeilBrown wrote:
> The recent conversion of fuse_reverse_inval_entry() to use
> start_removing() was wrong.
> As Val Packett points out the original code did not call ->lookup
> while the new code does.  This can lead to a deadlock.
> 
> Rather than using full_name_hash() and d_lookup() as the old code
> did, we can use try_lookup_noperm() which combines these.  Then
> the result can be given to start_removing_dentry() to get the required
> locks for removal.  We then double check that the name hasn't
> changed.
> 
> [...]

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] fuse: fix conversion of fuse_reverse_inval_entry() to start_removing()
      https://git.kernel.org/vfs/vfs/c/cab012375122