iputils/iputils-sec-ping-unblock.diff

From bf83678619dd0286f7a66f2ab02763751b0e8ca9 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Mon, 26 Aug 2013 13:02:36 +0200
Subject: Block SIGALRM in ping.c
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ping depends on SIGALRM to exit eventually, so we need to mask
it with UNBLOCK.

Signed-off-by: Marcus Schäfer <ms@suse.de>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
diff --git a/ping.c b/ping.c
index cfae0a5..4def349 100644
--- a/ping.c
+++ b/ping.c
@@ -496,6 +496,17 @@ main(int argc, char **argv)
 
 	/* Create sockets */
 	enable_capability_raw();
+
+	/*
+	* ping depend on SIGALARM to exit sometimes,
+	* but to popen, system, fork carry on parent signal handler
+	* so we mask it ourself.
+	*/
+	sigset_t s;
+	sigaddset(&s, SIGALRM);
+	sigprocmask(SIG_UNBLOCK, &s, NULL);
+	set_signal(SIGALRM, doexit);
+
 	if (hints.ai_family != AF_INET6)
 		create_socket(&sock4, AF_INET, hints.ai_socktype, IPPROTO_ICMP, hints.ai_family == AF_INET);
 	if (hints.ai_family != AF_INET)