3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oliver Hartkopp <socketcan@xxxxxxxxxxxx> commit 969439016d2cf61fef53a973d7e6d2061c3793b1 upstream. When accessing CAN network interfaces with AF_PACKET sockets e.g. by dhclient this can lead to a skb_under_panic due to missing skb initialisations. Add the missing initialisations at the CAN skbuff creation times on driver level (rx path) and in the network layer (tx path). Reported-by: Austin Schuh <austin@xxxxxxxxxxxxxxxx> Reported-by: Daniel Steer <daniel.steer@xxxxxxxxxxx> Signed-off-by: Oliver Hartkopp <socketcan@xxxxxxxxxxxx> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/can/dev.c | 8 ++++++++ net/can/af_can.c | 3 +++ 2 files changed, 11 insertions(+) --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -503,6 +503,14 @@ struct sk_buff *alloc_can_skb(struct net skb->pkt_type = PACKET_BROADCAST; skb->ip_summed = CHECKSUM_UNNECESSARY; + skb_reset_mac_header(skb); + skb_reset_network_header(skb); + skb_reset_transport_header(skb); + + skb_reset_mac_header(skb); + skb_reset_network_header(skb); + skb_reset_transport_header(skb); + can_skb_reserve(skb); can_skb_prv(skb)->ifindex = dev->ifindex; --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -262,6 +262,9 @@ int can_send(struct sk_buff *skb, int lo goto inval_skb; } + skb->ip_summed = CHECKSUM_UNNECESSARY; + + skb_reset_mac_header(skb); skb_reset_network_header(skb); skb_reset_transport_header(skb); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html