Commit 4c4d51a7 authored Apr 05, 2007 by Herbert Xu Committed by David S. Miller Apr 05, 2007

[IPSEC]: Reject packets within replay window but outside the bit mask



Up until this point we've accepted replay window settings greater than
32 but our bit mask can only accomodate 32 packets.  Thus any packet
with a sequence number within the window but outside the bit mask would
be accepted.

This patch causes those packets to be rejected instead.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 60e5c166

net/xfrm/xfrm_state.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1371,7 +1371,8 @@ int xfrm_replay_check(struct xfrm_state *x, __be32 net_seq)
		return 0;

		diff = x->replay.seq - seq;
		if (diff >= x->props.replay_window) {
		if (diff >= min_t(unsigned int, x->props.replay_window,
		sizeof(x->replay.bitmap) * 8)) {
		x->stats.replay_window++;
		return -EINVAL;
		}