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-rw-r--r--src/vnet/ipsec/ipsec_sa.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/ipsec/ipsec_sa.h b/src/vnet/ipsec/ipsec_sa.h
index 4f73f1eab0f..640d9288a42 100644
--- a/src/vnet/ipsec/ipsec_sa.h
+++ b/src/vnet/ipsec/ipsec_sa.h
@@ -486,7 +486,7 @@ ipsec_sa_anti_replay_and_sn_advance (const ipsec_sa_t *sa, u32 seq,
return 0;
}
- if (PREDICT_TRUE (sa->seq >= window_size - 1))
+ if (PREDICT_TRUE (window_size > 0 && sa->seq >= window_size - 1))
{
/*
* the last sequence number VPP received is more than one