From: Cong Wang <xiyou.wangcong@gmail.com>
To: netdev@vger.kernel.org
Cc: Cong Wang <xiyou.wangcong@gmail.com>,
syzbot+3f3837e61a48d32b495f@syzkaller.appspotmail.com,
Robin van der Gracht <robin@protonic.nl>,
Oleksij Rempel <linux@rempel-privat.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Oliver Hartkopp <socketcan@hartkopp.net>,
Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [Patch net] can: initialize skbcnt in j1939_tp_tx_dat_new()
Date: Wed, 7 Oct 2020 23:18:21 -0700 [thread overview]
Message-ID: <20201008061821.24663-1-xiyou.wangcong@gmail.com> (raw)
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>
---
net/can/j1939/transport.c | 1 +
1 file changed, 1 insertion(+)
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));
--
2.28.0
next reply other threads:[~2020-10-08 6:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 6:18 Cong Wang [this message]
2020-10-08 17:34 ` [Patch net] can: initialize skbcnt in j1939_tp_tx_dat_new() Jakub Kicinski
2020-10-08 20:02 ` Cong Wang
2020-10-08 21:47 ` Marc Kleine-Budde
2020-10-08 22:26 ` Jakub Kicinski
2020-10-09 6:15 ` Marc Kleine-Budde
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