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

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 [off-list ref] wrote:

quoted

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.