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

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Fixes #4234.

Signed-off-by: Jorge Niedbalski <jnr@metaklass.org>
This commit is contained in:
Jorge Niedbalski
2016-09-29 05:26:16 -04:00
committed by Zbigniew Jędrzejewski-Szmek
parent 831d3dc8d7
commit 531ac2b234
1 changed files with 4 additions and 0 deletions
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src/core/manager.c
+4
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@@ -1721,6 +1721,10 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t
return -errno; return -errno;
} }
if (n == 0) {
log_debug("Got zero-length notification message. Ignoring.");
return 0;
}
CMSG_FOREACH(cmsg, &msghdr) { CMSG_FOREACH(cmsg, &msghdr) {
if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {