xfrm: add prep for esp beet mode offload
Like __xfrm_transport/mode_tunnel_prep(), this patch is to add
__xfrm_mode_beet_prep() to fix the transport_header for gso
segments, and reset skb mac_len, and pull skb data to the
proto inside esp.
This patch also fixes a panic, reported by ltp:
# modprobe esp4_offload
# runltp -f net_stress.ipsec_tcp
[ 2452.780511] kernel BUG at net/core/skbuff.c:109!
[ 2452.799851] Call Trace:
[ 2452.800298] <IRQ>
[ 2452.800705] skb_push.cold.98+0x14/0x20
[ 2452.801396] esp_xmit+0x17b/0x270 [esp4_offload]
[ 2452.802799] validate_xmit_xfrm+0x22f/0x2e0
[ 2452.804285] __dev_queue_xmit+0x589/0x910
[ 2452.806264] __neigh_update+0x3d7/0xa50
[ 2452.806958] arp_process+0x259/0x810
[ 2452.807589] arp_rcv+0x18a/0x1c
It was caused by the skb going to esp_xmit with a wrong transport
header.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
1 file changed
