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@xxxxxxxxxxxxxxx> know about it. >From 3614364527daa870264f6dde77f02853cdecd02c Mon Sep 17 00:00:00 2001 From: Steffen Klassert <steffen.klassert@xxxxxxxxxxx> 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@xxxxxxxxxxx> 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@xxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxxxx are queue-4.9/ipv6-fix-may-be-used-uninitialized-warning-in-rt6_check.patch