From 9dee46063c340b67b8272bf8c1ed21a4fae4afbe Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Mon, 9 Oct 2017 08:43:55 +0200 Subject: [PATCH] ipv4: Fix traffic triggered IPsec connections. [ Upstream commit 6c0e7284d89995877740d8a26c3e99a937312a3c ] A recent patch removed the dst_free() on the allocated dst_entry in ipv4_blackhole_route(). The dst_free() marked the dst_entry as dead and added it to the gc list. I.e. it was setup for a one time usage. As a result we may now have a blackhole route cached at a socket on some IPsec scenarios. This makes the connection unusable. Fix this by marking the dst_entry directly at allocation time as 'dead', so it is used only once. Fixes: b838d5e1c5b6 ("ipv4: mark DST_NOGC and remove the operation of dst_free()") Reported-by: Tobias Brunner Signed-off-by: Steffen Klassert 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 c5aa25be71085..72afa4cfb0225 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2507,7 +2507,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or struct rtable *ort = (struct rtable *) dst_orig; struct rtable *rt; - rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, DST_OBSOLETE_NONE, 0); + rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, DST_OBSOLETE_DEAD, 0); if (rt) { struct dst_entry *new = &rt->dst; -- 2.47.2