From: Eric Garver <egar...@redhat.com>
Fixes a panic when calling eth_get_headlen(). Noticed on i40e driver.
Fixes: d5709f7ab776 ("flow_dissector: For stripped vlan, get vlan info from
skb->vlan_tci")
Signed-off-by: Eric Garver <e...@erig.me>
---
net/core/flow_dissector.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 1a7b80f73376..44e6ba9d3a6b 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -247,12 +247,10 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
case htons(ETH_P_8021Q): {
const struct vlan_hdr *vlan;
- if (skb_vlan_tag_present(skb))
+ if (skb && skb_vlan_tag_present(skb))
proto = skb->protocol;
- if (!skb_vlan_tag_present(skb) ||
- proto == cpu_to_be16(ETH_P_8021Q) ||
- proto == cpu_to_be16(ETH_P_8021AD)) {
+ if (eth_type_vlan(proto)) {
struct vlan_hdr _vlan;
vlan = __skb_header_pointer(skb, nhoff, sizeof(_vlan),
--
2.5.5
