From: Eric W. Biederman <ebiederm@xmission.com>
Date: Sat, 27 Oct 2007 05:56:12 +0000 (-0700)
Subject: [NETNS]: Fix get_net_ns_by_pid
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ceaa79c434044e40031585a65a4e45dc09322e8f;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[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@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4a2640d38261..e1ba26fb4bf2 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);