From: Cong Wang xiyou.wangcong@gmail.com
[ Upstream commit e009f95b1543e26606dca2f7e6e9f0f9174538e5 ]
This fixes an uninit-value warning: BUG: KMSAN: uninit-value in can_receive+0x26b/0x630 net/can/af_can.c:650
Reported-and-tested-by: syzbot+3f3837e61a48d32b495f@syzkaller.appspotmail.com Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Cc: Robin van der Gracht robin@protonic.nl Cc: Oleksij Rempel linux@rempel-privat.de Cc: Pengutronix Kernel Team kernel@pengutronix.de Cc: Oliver Hartkopp socketcan@hartkopp.net Cc: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Cong Wang xiyou.wangcong@gmail.com Link: https://lore.kernel.org/r/20201008061821.24663-1-xiyou.wangcong@gmail.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/can/j1939/transport.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -580,6 +580,7 @@ sk_buff *j1939_tp_tx_dat_new(struct j193 skb->dev = priv->ndev; can_skb_reserve(skb); can_skb_prv(skb)->ifindex = priv->ndev->ifindex; + can_skb_prv(skb)->skbcnt = 0; /* reserve CAN header */ skb_reserve(skb, offsetof(struct can_frame, data));