If the notification message length is 0, ignore the message (#4237)

Fixes #4234. Signed-off-by: Jorge Niedbalski <jnr@metaklass.org>
systemd · Sep 28, 2016 · 531ac2b2349da02acc9c382849758e07eb92b020 · 531ac2b · dejIO · Sep 29, 2016
1 parent 831d3dc
commit 531ac2b2349da02acc9c382849758e07eb92b020
Unified Split

Showing with 4 additions and 0 deletions.

+4 −0 src/core/manager.c
diff --git a/src/core/manager.c b/src/core/manager.c
@@ -1721,6 +1721,10 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t

                return -errno;
        }
+        if (n == 0) {
+                log_debug("Got zero-length notification message. Ignoring.");
+                return 0;
+        }

        CMSG_FOREACH(cmsg, &msghdr) {
                if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {