diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index e783244..118d8ae 100644
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -230,15 +230,19 @@ static char *tomoyo_get_socket_name(const struct path *path, char * const buffer
 				    const int buflen)
 {
 	struct inode *inode = d_backing_inode(path->dentry);
-	struct socket *sock = inode ? SOCKET_I(inode) : NULL;
-	struct sock *sk = sock ? sock->sk : NULL;
+	struct socket *sock;
+	struct sock *sk;
 
+	inode_lock(inode);
+	sock = SOCKET_I(inode);
+	sk = sock ? sock->sk : NULL;
 	if (sk) {
 		snprintf(buffer, buflen, "socket:[family=%u:type=%u:protocol=%u]",
 			 sk->sk_family, sk->sk_type, sk->sk_protocol);
 	} else {
 		snprintf(buffer, buflen, "socket:[unknown]");
 	}
+	inode_unlock(inode);
 	return buffer;
 }