Patch "ipv6: Fix may be used uninitialized warning in rt6_check" has been added to the 4.9-stable tree

Patch "ipv6: Fix may be used uninitialized warning in rt6_check" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ipv6: Fix may be used uninitialized warning in rt6_check

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ipv6-fix-may-be-used-uninitialized-warning-in-rt6_check.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3614364527daa870264f6dde77f02853cdecd02c Mon Sep 17 00:00:00 2001
From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Fri, 25 Aug 2017 09:05:42 +0200
Subject: ipv6: Fix may be used uninitialized warning in rt6_check

From: Steffen Klassert <steffen.klassert@secunet.com>

commit 3614364527daa870264f6dde77f02853cdecd02c upstream.

rt_cookie might be used uninitialized, fix this by
initializing it.

Fixes: c5cff8561d2d ("ipv6: add rcu grace period before freeing fib6_node")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/ipv6/route.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1267,7 +1267,7 @@ static void rt6_dst_from_metrics_check(s
 
 static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
 {
-	u32 rt_cookie;
+	u32 rt_cookie = 0;
 
 	if (!rt6_get_cookie_safe(rt, &rt_cookie) || rt_cookie != cookie)
 		return NULL;


Patches currently in stable-queue which might be from steffen.klassert@secunet.com are

queue-4.9/ipv6-fix-may-be-used-uninitialized-warning-in-rt6_check.patch