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-rw-r--r--epan/dissectors/packet-l2tp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/epan/dissectors/packet-l2tp.c b/epan/dissectors/packet-l2tp.c
index 830ac7c278..e0d33f0db1 100644
--- a/epan/dissectors/packet-l2tp.c
+++ b/epan/dissectors/packet-l2tp.c
@@ -924,7 +924,7 @@ static void sha1_hmac_digest(l2tpv3_tunnel_t *tunnel,
}
}
- sha1_hmac_update(&ms, tvb_get_ptr(tvb, 0, idx + 1 - offset), idx + 1 - offset);
+ sha1_hmac_update(&ms, tvb_get_ptr(tvb, offset, idx + 1 - offset), idx + 1 - offset);
/* Message digest is calculated with an empty message digest field */
memset(zero, 0, L2TP_HMAC_SHA1_DIGEST_LEN);
sha1_hmac_update(&ms, zero, avp_len - 1);