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authorOliver Hartkopp <socketcan@hartkopp.net>2015-02-23 20:37:54 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-26 15:06:54 +0100
commit3cc97c83e2051584120819e40e7b0ce4dadf0925 (patch)
tree06715f03ec34fb961e25f119064e63f4ed415a61 /net
parent49f3df5bdeb22ca0258b9ce90365aeb0e2ba041e (diff)
downloadlinux-linaro-stable-3cc97c83e2051584120819e40e7b0ce4dadf0925.tar.gz
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 <austin@peloton-tech.com> Reported-by: Daniel Steer <daniel.steer@mclaren.com> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/can/af_can.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c
index a27f8aad9e99..5e9a2272b7a7 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -262,6 +262,9 @@ int can_send(struct sk_buff *skb, int loop)
goto inval_skb;
}
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ skb_reset_mac_header(skb);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);