The patchset fix the issue caused by the following modifications:

commit 04e906839a053f092ef53f4fb2d610983412b904

(usbnet: fix cyclical race on disconnect with work queue)

attempt to access skb->next, triggering a NULL pointer dereference (Kernel Panic).

Fix issue:

adding the usbnet_going_away check in usb_submit_urb to synchronize the validation logic.

usbnet:fix NPE during rx_complete

drivers/net/usb/usbnet.c | 6 +++---

1 file changed, 3 insertions(+), 3 deletions(-)

--

Missing usbnet_going_away Check in Critical Path.

The usb_submit_urb function lacks a usbnet_going_away

validation, whereas __usbnet_queue_skb includes this check.

Subsequent processes:

(e.g., rx_complete → defer_bh → __skb_unlink(skb, list))

attempt to access skb->next, triggering a NULL pointer

dereference (Kernel Panic).

---

drivers/net/usb/usbnet.c | 6 +++---

1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c

+            __usbnet_queue_skb(&dev->rxq, skb, rx_start);

        }

    } else {

        netif_dbg(dev, ifdown, dev->net, "rx: stopped\n");

--