Re: KASAN: use-after-free Read in cfusbl_device_notify

[Dae R. Jeong]

On Fri, Jun 24, 2022 at 08:15:54AM +0200, Eric Dumazet wrote:
> On Fri, Jun 24, 2022 at 8:08 AM Dae R. Jeong <threeearcat@xxxxxxxxx> wrote:
> >
> > Hello,
> >
> > We observed a crash "KASAN: use-after-free Read in cfusbl_device_notify" during fuzzing.
> 
> This is a known problem.
> 
> Some drivers do not like NETDEV_UNREGISTER being delivered multiple times.
>
> Make sure in your fuzzing to have NET_DEV_REFCNT_TRACKER=y
> 
> Thanks.

Our config already have CONFIG_NET_DEV_REFCNT_TRACKER=y.
Anyway, this UAF report seems not interesting.

Thank you for your quick reply.


Best regards,
Dae R. Jeong.