fuse: annotate lock in fuse_reverse_inval_entry()

BugLink: https://bugs.launchpad.net/bugs/1957991
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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 60378f3baaae190510a41595752a3f45819598f7..34487bf1d791448a5cd9f73d9d1897c482b0b9b0 100644 (file)
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1032,7 +1032,7 @@ 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;