[PATCH net] tun: Add missing bpf_net_ctx_clear() in do_xdp_generic()

[Jeongjun Park]

Jakub Kicinski wrote:
>
> On Fri, 26 Jul 2024 06:40:49 +0900 Jeongjun Park wrote:
> > There are cases where do_xdp_generic returns bpf_net_context without
> > clearing it. This causes various memory corruptions, so the missing
> > bpf_net_ctx_clear must be added.
> >
> > Reported-by: syzbot+44623300f057a28baf1e@xxxxxxxxxxxxxxxxxxxxxxxxx
> > Fixes: fecef4cd42c6 ("tun: Assign missing bpf_net_context.")
> > Signed-off-by: Jeongjun Park <aha310510@xxxxxxxxx>
>
> Also likely:
>
> Reported-by: syzbot+3c2b6d5d4bec3b904933@xxxxxxxxxxxxxxxxxxxxxxxxx
> Reported-by: syzbot+707d98c8649695eaf329@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> Right?

Yes, both appear to be bugs with the same root cause.

Regards,
Jeongjun Park