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authorCong Wang <xiyou.wangcong@gmail.com>2020-10-07 23:18:21 -0700
committerMarc Kleine-Budde <mkl@pengutronix.de>2020-10-08 23:21:46 +0200
commite009f95b1543e26606dca2f7e6e9f0f9174538e5 (patch)
tree6c427a11a6cadf98b6546d58f9f62ef67345adea /net/can
parent81f1f5ae8b3cbd54fdd994c9e9aacdb7b414a802 (diff)
downloadlinux-e009f95b1543e26606dca2f7e6e9f0f9174538e5.tar.bz2
can: j1935: j1939_tp_tx_dat_new(): fix missing initialization of skbcnt
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>
Diffstat (limited to 'net/can')
-rw-r--r--net/can/j1939/transport.c1
1 files changed, 1 insertions, 0 deletions
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));