ceph: check i_nlink while converting a file handle to dentry

[mirror_ubuntu-bionic-kernel.git] / fs / ceph / export.c

diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index e8f11fa565c53ac58fddf402f6ade6320d47d490..7df550c13d7f3e25c2f0f4d6259bd92255a44f58 100644 (file)
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -91,6 +91,10 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
                ceph_mdsc_put_request(req);
                if (!inode)
                        return ERR_PTR(-ESTALE);
+               if (inode->i_nlink == 0) {
+                       iput(inode);
+                       return ERR_PTR(-ESTALE);
+               }
        }
 
        return d_obtain_alias(inode);