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(parent: bab2c80) | patch
packet: reset network header if packet shorter than ll reserved space
authorWillem de Bruijn <willemb@google.com>
Wed, 11 Jul 2018 16:00:45 +0000 (12:00 -0400)
committerDavid S. Miller <davem@davemloft.net>
Thu, 12 Jul 2018 23:55:59 +0000 (16:55 -0700)
commit993675a3100b16a4c80dfd70cbcde8ea7127b31d
treefeef4c1e7ca426c40bdbc1da1f745ee938b13eb3tree | snapshot
parentbab2c80e5a6c855657482eac9e97f5f3eedb509acommit | diff
packet: reset network header if packet shorter than ll reserved space

If variable length link layer headers result in a packet shorter
than dev->hard_header_len, reset the network header offset. Else
skb->mac_len may exceed skb->len after skb_mac_reset_len.

packet_sendmsg_spkt already has similar logic.

Fixes: b84bbaf7a6c8 ("packet: in packet_snd start writing at link layer allocation")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/packet/af_packet.c diff | blob | history
Domain: System / Kernel;