From 76eeb88f2a36e2ce5e1a302b34e9045e4829be4b Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Mon, 23 Feb 2015 20:37:54 +0100 Subject: can: add missing initialisations in CAN related skbuffs 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 Reported-by: Daniel Steer Signed-off-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde [bwh: Backported to 3.2: - Adjust context - Drop changes to alloc_canfd_skb()] Signed-off-by: Ben Hutchings --- net/can/af_can.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/can') diff --git a/net/can/af_can.c b/net/can/af_can.c index 0ce2ad0..7d9dff222 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -244,6 +244,9 @@ int can_send(struct sk_buff *skb, int loop) } skb->protocol = htons(ETH_P_CAN); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + skb_reset_mac_header(skb); skb_reset_network_header(skb); skb_reset_transport_header(skb); -- cgit v1.1