From ef846bc01da49cf63d289e97139bef5181e75229 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Fri, 13 Apr 2007 21:32:53 +0200 Subject: [PATCH] [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 Signed-off-by: David S. Miller Signed-off-by: Adrian Bunk --- net/xfrm/xfrm_state.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 4318aa0f8b86..11a969014fcc 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -776,7 +776,8 @@ int xfrm_replay_check(struct xfrm_state *x, u32 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; } -- 2.39.5