Re: [PATCH v2] media: usb: uvc: Fix NULL pointer dereference during USB device hot-unplug

[Jie Deng]

Hi Ricardo

Thank you for your reply

在 2025/11/22 16:17, Ricardo Ribalda 写道:
> Hi Jie
>
> On Sat, 22 Nov 2025 at 08:26, Jie Deng <dengjie03@xxxxxxxxxx> wrote:
> > Add safety checks to prevent kernel panic during the race window in
> > USB device disconnection.
> Can you share the kernel version that you are using?
The kernel version I'm using is 5.4.18
> This patch
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c93d73c9c2cfa7658f7100d201a47c4856746222
> Should prevent the race that you are describing.
>
>
> In your trace you have a reference to uvc_queue_streamoff that was
> deleted by that patch

This patch may indeed eliminate the problem I described.

The 5.4 longterm version should not have synchronized this patch？


Thanks,

Jie Deng