sd-daemon: verify NOTIFY_SOCKET path length

Better generate a real error then simply connect to the wrong socket.

diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
index c7887804df43a720de8e3d24bdfe99d17ecf0b37..27045e25d0c583a1131ddfdf95b6b1d9e0d0ece1 100644 (file)
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ b/src/libsystemd/sd-daemon/sd-daemon.c
@@ -436,6 +436,11 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
                 goto finish;
         }
 
+        if (strlen(e) > sizeof(sockaddr.un.sun_path)) {
+                r = -EINVAL;
+                goto finish;
+        }
+
         fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
         if (fd < 0) {
                 r = -errno;