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-rw-r--r--net/netfilter/xt_mac.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/xt_mac.c b/net/netfilter/xt_mac.c
index 2039d07..b971ce9 100644
--- a/net/netfilter/xt_mac.c
+++ b/net/netfilter/xt_mac.c
@@ -10,6 +10,7 @@
#include <linux/module.h>
#include <linux/skbuff.h>
+#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>
@@ -29,6 +30,8 @@ static bool mac_mt(const struct sk_buff *skb, const struct xt_match_param *par)
const struct xt_mac_info *info = par->matchinfo;
bool ret;
+ if (skb->dev == NULL || skb->dev->type != ARPHRD_ETHER)
+ return false;
if (skb_mac_header(skb) < skb->head)
return false;
if (skb_mac_header(skb) + ETH_HLEN > skb->data)