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Diffstat (limited to 'include/net/mac802154.h')
-rw-r--r--include/net/mac802154.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index da574bbdc333..2e3cdd2048d2 100644
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -247,8 +247,9 @@ struct ieee802154_ops {
*/
static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
{
- /* return some invalid fc on failure */
- if (unlikely(skb->len < 2)) {
+ /* check if we can fc at skb_mac_header of sk buffer */
+ if (unlikely(!skb_mac_header_was_set(skb) ||
+ (skb_tail_pointer(skb) - skb_mac_header(skb)) < 2)) {
WARN_ON(1);
return cpu_to_le16(0);
}