diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2018-01-16 19:30:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-31 14:46:13 +0100 |
| commit | 16d977e9bbf4a8a125da9978b89e32e92a13b1b0 (patch) | |
| tree | 178fbfdb93d7605da33a51d43ef356a3cebac69a /net | |
| parent | 6b6f9e3d00443fa0431ddb9bb84f8db1453e7783 (diff) | |
can: af_can: can_rcv(): replace WARN_ONCE by pr_warn_once
commit 8cb68751c115d176ec851ca56ecfbb411568c9e8 upstream.
If an invalid CAN frame is received, from a driver or from a tun
interface, a Kernel warning is generated.
This patch replaces the WARN_ONCE by a simple pr_warn_once, so that a
kernel, bootet with panic_on_warn, does not panic. A printk seems to be
more appropriate here.
Reported-by: syzbot+4386709c0c1284dca827@syzkaller.appspotmail.com
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/can/af_can.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index ee6eee7a8b42..92b2a67c8dc6 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -719,13 +719,12 @@ static int can_rcv(struct sk_buff *skb, struct net_device *dev, if (unlikely(!net_eq(dev_net(dev), &init_net))) goto drop; - if (WARN_ONCE(dev->type != ARPHRD_CAN || - skb->len != CAN_MTU || - cfd->len > CAN_MAX_DLEN, - "PF_CAN: dropped non conform CAN skbuf: " - "dev type %d, len %d, datalen %d\n", - dev->type, skb->len, cfd->len)) + if (unlikely(dev->type != ARPHRD_CAN || skb->len != CAN_MTU || + cfd->len > CAN_MAX_DLEN)) { + pr_warn_once("PF_CAN: dropped non conform CAN skbuf: dev type %d, len %d, datalen %d\n", + dev->type, skb->len, cfd->len); goto drop; + } can_receive(skb, dev); return NET_RX_SUCCESS; |