linux-kernel - [PATCH 4.19 49/56] fuse: annotate lock in fuse_reverse_inval

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Date:   Mon, 20 Dec 2021 15:34:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miklos Szeredi <mszeredi@...hat.com>,
        syzbot+9f747458f5990eaa8d43@...kaller.appspotmail.com
Subject: [PATCH 4.19 49/56] fuse: annotate lock in fuse_reverse_inval_entry()

From: Miklos Szeredi <mszeredi@...hat.com>

commit bda9a71980e083699a0360963c0135657b73f47a upstream.

Add missing inode lock annotatation; found by syzbot.

Reported-and-tested-by: syzbot+9f747458f5990eaa8d43@...kaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/fuse/dir.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -984,7 +984,7 @@ int fuse_reverse_inval_entry(struct supe
 	if (!parent)
 		return -ENOENT;
 
-	inode_lock(parent);
+	inode_lock_nested(parent, I_MUTEX_PARENT);
 	if (!S_ISDIR(parent->i_mode))
 		goto unlock;