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authorMartin KaFai Lau <kafai@fb.com>2015-01-21 06:16:02 +0300
committerDavid S. Miller <davem@davemloft.net>2015-01-26 09:09:51 +0300
commitb0a1ba59921eaaa9cb8f97bb35f2e6870fcdfedc (patch)
tree5db7467e7b5ff0163499cb807a8835642190245e /net
parent24df8986f36b9a5d8ae08236498d92267bac454b (diff)
downloadlinux-b0a1ba59921eaaa9cb8f97bb35f2e6870fcdfedc.tar.xz
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 <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/route.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 166e33bed222..495965358d22 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);