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[2/3] can: j1935: j1939_tp_tx_dat_new(): fix missing initialization of skbcnt

Message ID 20201008214022.2044402-3-mkl@pengutronix.de
State New
Headers show
Series [1/3] can: m_can_platform: don't call m_can_class_suspend in runtime suspend | expand

Commit Message

Marc Kleine-Budde Oct. 8, 2020, 9:40 p.m. UTC 
From: Cong Wang <xiyou.wangcong@gmail.com>

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>
---
 net/can/j1939/transport.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index 0cec4152f979..88cf1062e1e9 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -580,6 +580,7 @@  sk_buff *j1939_tp_tx_dat_new(struct j1939_priv *priv,
 	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));