diff options
| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2018-01-16 19:30:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-01-23 19:58:17 +0100 |
| commit | 41812e400fc0f6aa2ff4fde54462b32b2c9884f6 (patch) | |
| tree | fe38b33708d74039cdf3b841d7d4ce54c1d6e3d6 /net/can | |
| parent | 91c5fbf1e20b0c0508fdeb5bc0763c65a935f480 (diff) | |
| download | linux-stable-41812e400fc0f6aa2ff4fde54462b32b2c9884f6.tar.gz linux-stable-41812e400fc0f6aa2ff4fde54462b32b2c9884f6.tar.bz2 linux-stable-41812e400fc0f6aa2ff4fde54462b32b2c9884f6.zip | |
can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once
commit d4689846881d160a4d12a514e991a740bcb5d65a upstream.
If an invalid CANFD 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+e3b775f40babeff6e68b@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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/can')
| -rw-r--r-- | net/can/af_can.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index c94e619329a9..e3626e8500c2 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -738,20 +738,16 @@ static int canfd_rcv(struct sk_buff *skb, struct net_device *dev, { struct canfd_frame *cfd = (struct canfd_frame *)skb->data; - if (WARN_ONCE(dev->type != ARPHRD_CAN || - skb->len != CANFD_MTU || - cfd->len > CANFD_MAX_DLEN, - "PF_CAN: dropped non conform CAN FD skbuf: " - "dev type %d, len %d, datalen %d\n", - dev->type, skb->len, cfd->len)) - goto drop; + if (unlikely(dev->type != ARPHRD_CAN || skb->len != CANFD_MTU || + cfd->len > CANFD_MAX_DLEN)) { + pr_warn_once("PF_CAN: dropped non conform CAN FD skbuf: dev type %d, len %d, datalen %d\n", + dev->type, skb->len, cfd->len); + kfree_skb(skb); + return NET_RX_DROP; + } can_receive(skb, dev); return NET_RX_SUCCESS; - -drop: - kfree_skb(skb); - return NET_RX_DROP; } /* |