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fm10k: Check tunnel header length in encap offload 

fm10k supports up to 184 bytes of inner+outer headers. Add an initial
check to fail encap offload if these are too large.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Joe Stringer 2014-11-14 07:47:40 +00:00 committed by Jeff Kirsher
parent e2929e453a
commit b66b6d9f6d
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/intel/fm10k/fm10k_main.c
View File

@ -727,6 +727,12 @@ static __be16 fm10k_tx_encap_offload(struct sk_buff *skb)
struct ethhdr *eth_hdr;
u8 l4_hdr = 0;
/* fm10k supports 184 octets of outer+inner headers. Minus 20 for inner L4. */
#define FM10K_MAX_ENCAP_TRANSPORT_OFFSET 164
if (skb_inner_transport_header(skb) - skb_mac_header(skb) >
FM10K_MAX_ENCAP_TRANSPORT_OFFSET)
return 0;
switch (vlan_get_protocol(skb)) {
case htons(ETH_P_IP):
l4_hdr = ip_hdr(skb)->protocol;