From: Hangyu Hua <hbh25y@gmail.com> stable inclusion from stable-v5.10.110 commit 0801a51d79389282c1271e623613b2e1886e071e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I51YBO CVE: CVE-2022-28389 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 04c9b00ba83594a29813d6b1fb8fdc93a3915174 upstream. There is no need to call dev_kfree_skb() when usb_submit_urb() fails because can_put_echo_skb() deletes original skb and can_free_echo_skb() deletes the cloned skb. Fixes: 51f3baad7de9 ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer") Link: https://lore.kernel.org/all/20220311080208.45047-1-hbh25y@gmail.com Signed-off-by: Hangyu Hua <hbh25y@gmail.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com> --- drivers/net/can/usb/mcba_usb.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index 912160fd2ca0..756a343e3cf5 100644 --- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -368,7 +368,6 @@ static netdev_tx_t mcba_usb_start_xmit(struct sk_buff *skb, xmit_failed: can_free_echo_skb(priv->netdev, ctx->ndx); mcba_usb_free_ctx(ctx); - dev_kfree_skb(skb); stats->tx_dropped++; return NETDEV_TX_OK; -- 2.20.1