From: Milan Broz <mbroz@redhat.com>
Date: Mon, 22 Aug 2011 13:51:34 +0000 (+0200)
Subject: kobj_uevent: Ignore if some listeners cannot handle message
X-Git-Tag: v2.6.32.47~44
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b628ea1f5cd046c9bd07c5ebef824bae08a85f1c;p=linux-pvops.git

kobj_uevent: Ignore if some listeners cannot handle message

commit ebf4127cd677e9781b450e44dfaaa1cc595efcaa upstream.

kobject_uevent() uses a multicast socket and should ignore
if one of listeners cannot handle messages or nobody is
listening at all.

Easily reproducible when a process in system is cloned
with CLONE_NEWNET flag.

(See also http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/5256)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Acked-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 920a3ca6e259..507b821f4c16 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -235,7 +235,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
 			retval = netlink_broadcast(uevent_sock, skb, 0, 1,
 						   GFP_KERNEL);
 			/* ENOBUFS should be handled in userspace */
-			if (retval == -ENOBUFS)
+			if (retval == -ENOBUFS || retval == -ESRCH)
 				retval = 0;
 		} else
 			retval = -ENOMEM;