From 62e1a647e74f708eeabf1c79f3d40833d8ce45eb Mon Sep 17 00:00:00 2001 From: Li RongQing Date: Thu, 22 May 2014 16:36:55 +0800 Subject: [PATCH] ipv4: initialise the itag variable in __mkroute_input [ Upstream commit fbdc0ad095c0a299e9abf5d8ac8f58374951149a ] the value of itag is a random value from stack, and may not be initiated by fib_validate_source, which called fib_combine_itag if CONFIG_IP_ROUTE_CLASSID is not set This will make the cached dst uncertainty Signed-off-by: Li RongQing Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 108c73d760df0..90bc88bbd2a4f 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2129,7 +2129,7 @@ static int __mkroute_input(struct sk_buff *skb, struct in_device *out_dev; unsigned int flags = 0; __be32 spec_dst; - u32 itag; + u32 itag = 0; /* get a working reference to the output device */ out_dev = __in_dev_get_rcu(FIB_RES_DEV(*res)); -- 2.47.3