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Message-Id: <20221019083321.432851272@linuxfoundation.org>
Date: Wed, 19 Oct 2022 10:33:20 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Marc Kleine-Budde <mkl@...gutronix.de>,
Oliver Hartkopp <socketcan@...tkopp.net>,
Ziyang Xuan <william.xuanziyang@...wei.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.0 713/862] can: bcm: check the result of can_send() in bcm_can_tx()
From: Ziyang Xuan <william.xuanziyang@...wei.com>
[ Upstream commit 3fd7bfd28cfd68ae80a2fe92ea1615722cc2ee6e ]
If can_send() fail, it should not update frames_abs counter
in bcm_can_tx(). Add the result check for can_send() in bcm_can_tx().
Suggested-by: Marc Kleine-Budde <mkl@...gutronix.de>
Suggested-by: Oliver Hartkopp <socketcan@...tkopp.net>
Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>
Link: https://lore.kernel.org/all/9851878e74d6d37aee2f1ee76d68361a46f89458.1663206163.git.william.xuanziyang@huawei.com
Acked-by: Oliver Hartkopp <socketcan@...tkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
net/can/bcm.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/net/can/bcm.c b/net/can/bcm.c
index e60161bec850..f16271a7ae2e 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -274,6 +274,7 @@ static void bcm_can_tx(struct bcm_op *op)
struct sk_buff *skb;
struct net_device *dev;
struct canfd_frame *cf = op->frames + op->cfsiz * op->currframe;
+ int err;
/* no target device? => exit */
if (!op->ifindex)
@@ -298,11 +299,11 @@ static void bcm_can_tx(struct bcm_op *op)
/* send with loopback */
skb->dev = dev;
can_skb_set_owner(skb, op->sk);
- can_send(skb, 1);
+ err = can_send(skb, 1);
+ if (!err)
+ op->frames_abs++;
- /* update statistics */
op->currframe++;
- op->frames_abs++;
/* reached last frame? */
if (op->currframe >= op->nframes)
--
2.35.1
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