From b0a1ba59921eaaa9cb8f97bb35f2e6870fcdfedc Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Tue, 20 Jan 2015 19:16:02 -0800 Subject: [PATCH] ipv6: Fix __ip6_route_redirect In my last commit (a3c00e4: ipv6: Remove BACKTRACK macro), the changes in __ip6_route_redirect is incorrect. The following case is missed: 1. The for loop tries to find a valid gateway rt. If it fails to find one, rt will be NULL. 2. When rt is NULL, it is set to the ip6_null_entry. 3. The newly added 'else if', from a3c00e4, will stop the backtrack from happening. Signed-off-by: Martin KaFai Lau Signed-off-by: David S. Miller --- net/ipv6/route.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 166e33b..49596535 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1242,12 +1242,16 @@ restart: rt = net->ipv6.ip6_null_entry; else if (rt->dst.error) { rt = net->ipv6.ip6_null_entry; - } else if (rt == net->ipv6.ip6_null_entry) { + goto out; + } + + if (rt == net->ipv6.ip6_null_entry) { fn = fib6_backtrack(fn, &fl6->saddr); if (fn) goto restart; } +out: dst_hold(&rt->dst); read_unlock_bh(&table->tb6_lock); -- 2.7.4