From 8b998d862e401c252c4323974698691e67846412 Mon Sep 17 00:00:00 2001 From: Jan Synacek Date: Tue, 15 Aug 2017 13:29:51 +0200 Subject: [PATCH] udev: ignore SIGCHLD from unexpected processes (#1306539) RHEL-only Author: grzegorz.halat@motorolasolutions.com Resolves: #1306539 --- src/udev/udev-event.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c index bc115f1..0ba0792 100644 --- a/src/udev/udev-event.c +++ b/src/udev/udev-event.c @@ -610,7 +610,11 @@ static int spawn_wait(struct udev_event *event, event->sigterm = true; break; case SIGCHLD: - if (waitpid(pid, &status, WNOHANG) < 0) + if (pid != (pid_t) fdsi.ssi_pid) { + log_debug("expected SIGCHLD from '%s' ["PID_FMT"] received from unknown process ["PID_FMT"]. Ignoring", cmd, pid, fdsi.ssi_pid); + continue; + } + if (waitpid(pid, &status, WNOHANG) <= 0) break; if (WIFEXITED(status)) { log_debug("'%s' ["PID_FMT"] exit with return code %i", cmd, pid, WEXITSTATUS(status));