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From 461c10112d74ab223226554f2bb73aabaef43c9a Mon Sep 17 00:00:00 2001
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From: Jan Synacek <jsynacek@redhat.com>
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Date: Tue, 15 Aug 2017 13:29:51 +0200
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Subject: [PATCH] udev: ignore SIGCHLD from unexpected processes (#1306539)
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RHEL-only
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Author: grzegorz.halat@motorolasolutions.com
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Resolves: #1306539
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---
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src/udev/udev-event.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
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index bc115f112d..0ba079201c 100644
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--- a/src/udev/udev-event.c
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+++ b/src/udev/udev-event.c
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@@ -610,7 +610,11 @@ static int spawn_wait(struct udev_event *event,
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event->sigterm = true;
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break;
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case SIGCHLD:
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- if (waitpid(pid, &status, WNOHANG) < 0)
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+ if (pid != (pid_t) fdsi.ssi_pid) {
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+ log_debug("expected SIGCHLD from '%s' ["PID_FMT"] received from unknown process ["PID_FMT"]. Ignoring", cmd, pid, fdsi.ssi_pid);
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+ continue;
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+ }
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+ if (waitpid(pid, &status, WNOHANG) <= 0)
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break;
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if (WIFEXITED(status)) {
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log_debug("'%s' ["PID_FMT"] exit with return code %i", cmd, pid, WEXITSTATUS(status));
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