[PATCH net] ipv6: Fix may be used uninitialized warning in rt6_check

[Steffen Klassert]

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.klass...@secunet.com>
---
 net/ipv6/route.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a9d3564..48c8c92 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1289,7 +1289,7 @@ static void rt6_dst_from_metrics_check(struct rt6_info 
*rt)
 
 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;
-- 
2.7.4