tree 2651b2efbbdc39beb00bcf3e9cd45f949952c240
parent 8a6e77d5209e459a9ec5c268c39800c06cd1dc86
author Florian Westphal <fw@strlen.de> 1322203636 +0000
committer David S. Miller <davem@davemloft.net> 1322341056 -0500

l2tp: ensure sk->dst is still valid

When using l2tp over ipsec, the tunnel will hang when rekeying
occurs. Reason is that the transformer bundle attached to the dst entry
is now in STATE_DEAD and thus xfrm_output_one() drops all packets
(XfrmOutStateExpired increases).

Fix this by calling __sk_dst_check (which drops the stale dst
if xfrm dst->check callback finds that the bundle is no longer valid).

Cc: James Chapman <jchapman@katalix.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>