openwrt/target/linux/generic/patches-4.3/103-packet_allow_empty_payload.patch
Felix Fietkau 8a2a1c1d71 kernel: fix an af_packet regression that was breaking PPPoE on 4.1+ (#20707)
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 47459
2015-11-11 14:12:51 +00:00

18 lines
636 B
Diff

Fix a regression in the af_packet code that was breaking PPPoE
pppd sends packets with only a header and no payload.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2323,7 +2323,7 @@ static void tpacket_destruct_skb(struct
static bool ll_header_truncated(const struct net_device *dev, int len)
{
/* net device doesn't like empty head */
- if (unlikely(len <= dev->hard_header_len)) {
+ if (unlikely(len < dev->hard_header_len)) {
net_warn_ratelimited("%s: packet size is too short (%d <= %d)\n",
current->comm, len, dev->hard_header_len);
return true;