From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 4 May 2026 04:32:43 +0000 (-0400)
Subject: find_acceptable_alias(): skip NORCU aliases with zero refcount
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=87e801e1678342fc23b1eb92c0eecedf5dca79cb;p=thirdparty%2Flinux.git

find_acceptable_alias(): skip NORCU aliases with zero refcount

similar to d_find_any_alias() situation

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index fbd45e7ae706b..eafd99507afee 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -53,10 +53,10 @@ find_acceptable_alias(struct dentry *result,
 	inode = result->d_inode;
 	spin_lock(&inode->i_lock);
 	for_each_alias(dentry, inode) {
-		dget(dentry);
+		if (!dget_alias_ilocked(dentry))
+			continue;
 		spin_unlock(&inode->i_lock);
-		if (toput)
-			dput(toput);
+		dput(toput);
 		if (dentry != result && acceptable(context, dentry)) {
 			dput(result);
 			return dentry;
@@ -66,8 +66,7 @@ find_acceptable_alias(struct dentry *result,
 	}
 	spin_unlock(&inode->i_lock);
 
-	if (toput)
-		dput(toput);
+	dput(toput);
 	return NULL;
 }