netdev - [PATCH] netns: Fix get_net_ns_by

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Message-ID: <m1ve8twj2y.fsf@ebiederm.dsl.xmission.com>
Date:	Fri, 26 Oct 2007 17:29:41 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	David Miller <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>,
	Linux Containers <containers@...ts.osdl.org>,
	"Denis V. Lunev" <dlunev@...il.com>,
	Benjamin Thery <benjamin.thery@...l.net>,
	Daniel Lezcano <dlezcano@...ibm.com>
Subject: [PATCH] netns: Fix get_net_ns_by_pid


The pid namespace patches changed the semantics of
find_task_by_pid without breaking the compile resulting
in get_net_ns_by_pid doing the wrong thing.

So switch to using the intended find_task_by_vpid.

Combined with Denis' earlier patch to make netlink traffic
fully synchronous the inadvertent race I introduced with
accessing current is actually removed.

Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
---
 net/core/rtnetlink.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4a2640d..e1ba26f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -742,7 +742,7 @@ static struct net *get_net_ns_by_pid(pid_t pid)
 	/* Lookup the network namespace */
 	net = ERR_PTR(-ESRCH);
 	rcu_read_lock();
-	tsk = find_task_by_pid(pid);
+	tsk = find_task_by_vpid(pid);
 	if (tsk) {
 		struct nsproxy *nsproxy;
 		nsproxy = task_nsproxy(tsk);
-- 
1.5.3.rc6.17.g1911

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