Commit 7e71af49 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
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[NETFILTER]: Fix HW checksum handling in TCPMSS target

Most importantly, remove bogus BUG() in receive path.
Signed-off-by: default avatarPatrick McHardy <>
Signed-off-by: default avatarDavid S. Miller <>
parent f93592ff
......@@ -61,6 +61,10 @@ ipt_tcpmss_target(struct sk_buff **pskb,
if (!skb_ip_make_writable(pskb, (*pskb)->len))
return NF_DROP;
if ((*pskb)->ip_summed == CHECKSUM_HW &&
skb_checksum_help(*pskb, out == NULL))
return NF_DROP;
iph = (*pskb)->nh.iph;
tcplen = (*pskb)->len - iph->ihl*4;
......@@ -186,9 +190,6 @@ ipt_tcpmss_target(struct sk_buff **pskb,
/* We never hw checksum SYN packets. */
BUG_ON((*pskb)->ip_summed == CHECKSUM_HW);
(*pskb)->nfcache |= NFC_UNKNOWN | NFC_ALTERED;
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