From: Miklos Szeredi <mszeredi@redhat.com>
Date: Fri, 22 Oct 2021 15:03:01 +0000 (+0200)
Subject: fuse: annotate lock in fuse_reverse_inval_entry()
X-Git-Tag: v4.14.259~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5751a4cdee1fb8b6ec6c6f5f6f4fee210d3c1b9;p=thirdparty%2Fkernel%2Fstable.git

fuse: annotate lock in fuse_reverse_inval_entry()

commit bda9a71980e083699a0360963c0135657b73f47a upstream.

Add missing inode lock annotatation; found by syzbot.

Reported-and-tested-by: syzbot+9f747458f5990eaa8d43@syzkaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 4d95a416fc36b..b8d13b69583cc 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -969,7 +969,7 @@ int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
 	if (!parent)
 		return -ENOENT;
 
-	inode_lock(parent);
+	inode_lock_nested(parent, I_MUTEX_PARENT);
 	if (!S_ISDIR(parent->i_mode))
 		goto unlock;