This patch change the length check to len instead of mac_len for
checking if the frame control field is available to dereference.
We need to change it because I saw issues with af_packet raw sockets
and the mrf24j40 which calls this functionality. The raw socket
functionality doesn't set the mac_len but resets the skb_mac_header to
skb->data which is still correct. The issue occur at mrf24j40 only,
because the driver need to evaluate the fc fields.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
---
include/net/mac802154.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index 2c47850..5718765 100644
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -248,7 +248,7 @@ 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->mac_len < 2)) {
+ if (unlikely(skb->len < 2)) {
WARN_ON(1);
return cpu_to_le16(0);
}
--
2.5.3
--
To unsubscribe from this list: send the line "unsubscribe linux-wpan" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
