From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 3 Feb 2025 21:16:09 +0000 (-0500)
Subject: fix braino in "9p: fix ->rename_sem exclusion"
X-Git-Tag: v6.14-rc2~35^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=902e09c8acde117b00369521f54df817a983d4ab;p=thirdparty%2Fkernel%2Flinux.git

fix braino in "9p: fix ->rename_sem exclusion"

->d_op can bloody well be NULL

Fucked-up-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 30d61efe118c "9p: fix ->rename_sem exclusion"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/dcache.c b/fs/dcache.c
index 903142b324e98..8a605681b26ff 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2967,11 +2967,11 @@ static int __d_unalias(struct dentry *dentry, struct dentry *alias)
 		goto out_err;
 	m2 = &alias->d_parent->d_inode->i_rwsem;
 out_unalias:
-	if (alias->d_op->d_unalias_trylock &&
+	if (alias->d_op && alias->d_op->d_unalias_trylock &&
 	    !alias->d_op->d_unalias_trylock(alias))
 		goto out_err;
 	__d_move(alias, dentry, false);
-	if (alias->d_op->d_unalias_unlock)
+	if (alias->d_op && alias->d_op->d_unalias_unlock)
 		alias->d_op->d_unalias_unlock(alias);
 	ret = 0;
 out_err: