[PATCH] Linux: Create Netlink socket with SOCK_CLOEXEC in __check_pf [BZ #15722]

[Florian Weimer]

2018-06-18  Florian Weimer  <fweimer@redhat.com>

	[BZ #15722]
	* sysdeps/unix/sysv/linux/check_pf.c (__check_pf): Create Netlink
	socket with SOCK_CLOEXEC.

diff --git a/sysdeps/unix/sysv/linux/check_pf.c b/sysdeps/unix/sysv/linux/check_pf.c
index 36326abe80..04cd104aec 100644
--- a/sysdeps/unix/sysv/linux/check_pf.c
+++ b/sysdeps/unix/sysv/linux/check_pf.c
@@ -313,7 +313,7 @@ __check_pf (bool *seen_ipv4, bool *seen_ipv6,
     }
   else
     {
-      int fd = __socket (PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+      int fd = __socket (PF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
 
       if (__glibc_likely (fd >= 0))
 	{