Re: general protection fault in qdisc_reset

[Eric Dumazet]

On Mon, Aug 19, 2024 at 9:11 AM 김민성 <ii4gsp@xxxxxxxxx> wrote:
>
> Hi,
>
> I have been fuzzing Linux 6.10.0-rc3 with Syzkaller and found.
>
> kernel config: https://github.com/ii4gsp/etc/blob/main/200767fee68b8d90c9cf284390e34fa9b17542c9/config_v6.10.0_rc3
> C repro: https://github.com/ii4gsp/etc/blob/main/200767fee68b8d90c9cf284390e34fa9b17542c9/repro.cprog
> repro syscall steps:
> https://github.com/ii4gsp/etc/blob/main/200767fee68b8d90c9cf284390e34fa9b17542c9/repro.prog

Please do not fuzz old rc kernels, this will avoid finding issues that
were already fixed.

For instance, this problem has been fixed two months ago

commit bab4923132feb3e439ae45962979c5d9d5c7c1f1
Author: Yunseong Kim <yskelg@xxxxxxxxx>
Date:   Tue Jun 25 02:33:23 2024 +0900

    tracing/net_sched: NULL pointer dereference in perf_trace_qdisc_reset()