From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 22 Aug 2025 17:07:43 +0000 (-0400)
Subject: finish_automount(): simplify the ELOOP check
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=11941610b06820c4af7f1ff12071f159b3bf771d;p=users%2Fhch%2Fmisc.git

finish_automount(): simplify the ELOOP check

It's enough to check that dentries match; if path->dentry is equal to
m->mnt_root, superblocks will match as well.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namespace.c b/fs/namespace.c
index 86c6dd432b13..bdb33270ac6e 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3798,8 +3798,7 @@ int finish_automount(struct vfsmount *m, const struct path *path)
 
 	mnt = real_mount(m);
 
-	if (m->mnt_sb == path->mnt->mnt_sb &&
-	    m->mnt_root == dentry) {
+	if (m->mnt_root == path->dentry) {
 		err = -ELOOP;
 		goto discard;
 	}