RE: [PATCH net] can: esd_usb: kill anchored URBs before freeing netdevs

[Jagielski, Jedrzej]

From: Fan Wu <fanwu01@xxxxxxxxxx> 
Sent: Thursday, July 9, 2026 12:46 PM

>esd_usb_disconnect() frees each CAN netdev with free_candev() inside
>its per-netdev loop and only calls unlink_all_urbs(dev) afterwards.
>The per-netdev private data (struct esd_usb_net_priv) is embedded in
>the net_device allocation returned by alloc_candev(), so once
>free_candev() has run, dev->nets[i] points to freed memory.
>unlink_all_urbs() then dereferences the freed dev->nets[i] to kill the
>per-netdev TX anchor (usb_kill_anchored_urbs(&priv->tx_submitted)),
>clear active_tx_jobs, and reset priv->tx_contexts[].
>
>Reorder the teardown so the anchored URBs are killed before the netdevs
>are freed, matching other CAN/USB drivers in the same directory such as
>ems_usb, usb_8dev and mcba_usb, which unregister, then unlink, then
>free: unregister the netdevs first (which stops their TX queues), call
>unlink_all_urbs(dev) once, then free the netdevs.
>
>This issue was found by an in-house static analysis tool.
>
>Fixes: 96d8e90382dc336b5de401164597edfdc2e8d9f1 ("can: Add driver for esd CAN-USB/2 device")

Hi Fan,

no need to put whole SHA, 12 first chars is enough