Commit 20967f42 authored by Alexander Duyck's avatar Alexander Duyck Committed by Jeff Kirsher
Browse files

ixgbe: Mask off check of frag_off as we only want fragment offset

We were incorrectly checking the entire frag_off field when we only wanted the
fragment offset.  As a result we were not pulling in TCP headers when the DNF
flag was set.

To correct that we will now check for frag off using the IP_OFFSET mask.
Signed-off-by: default avatarAlexander Duyck <>
Tested-by: default avatarPhil Schmitt <>
Signed-off-by: default avatarJeff Kirsher <>
parent 2551c405
......@@ -1337,7 +1337,7 @@ static unsigned int ixgbe_get_headlen(unsigned char *data,
return - data;
/* record next protocol if header is present */
if (!hdr.ipv4->frag_off)
if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
nexthdr = hdr.ipv4->protocol;
} else if (protocol == __constant_htons(ETH_P_IPV6)) {
if (( - data) > (max_len - sizeof(struct ipv6hdr)))
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment