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authorMichal Kubecek <mkubecek@suse.cz>2012-12-04 11:09:13 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-12-10 10:45:08 -0800
commitbc436ddffc68d8c9e3e2e69e3253445af85c0881 (patch)
treef210b415797af8fd7d44ffae99e89354c48209c0
parente86b690c9659a03d8a6bb7ded18894718ab64360 (diff)
route: release dst_entry.hh_cache when handling redirects
Stable-3.0 commit 42ab5316 (ipv4: fix redirect handling) was backport of mainline commit 9cc20b26 from 3.2-rc3 where hh member of struct dst_entry was already gone. However, in 3.0 we still have it and we have to clean it as well, otherwise it keeps pointing to the cleaned up (and unusable) hh_cache entry and packets cannot be sent out. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/ipv4/route.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6b95f74a91d3..5ff2614706e7 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1374,6 +1374,7 @@ static int check_peer_redir(struct dst_entry *dst, struct inet_peer *peer)
struct rtable *rt = (struct rtable *) dst;
__be32 orig_gw = rt->rt_gateway;
struct neighbour *n, *old_n;
+ struct hh_cache *old_hh;
dst_confirm(&rt->dst);
@@ -1381,6 +1382,9 @@ static int check_peer_redir(struct dst_entry *dst, struct inet_peer *peer)
n = __arp_bind_neighbour(&rt->dst, rt->rt_gateway);
if (IS_ERR(n))
return PTR_ERR(n);
+ old_hh = xchg(&rt->dst.hh, NULL);
+ if (old_hh)
+ hh_cache_put(old_hh);
old_n = xchg(&rt->dst._neighbour, n);
if (old_n)
neigh_release(old_n);