Re: KASAN: use-after-free Read in __xfrm6_tunnel_spi_lookup

[Steffen Klassert]

On Thu, Sep 10, 2020 at 10:09:50AM +0200, Dmitry Vyukov wrote:
> On Thu, Sep 10, 2020 at 10:08 AM B K Karthik <bkkarthik@xxxxxxxxxxxx> wrote:
> >
> > On Thu, Sep 10, 2020 at 1:32 PM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
> > >
> > > On Thu, Sep 10, 2020 at 9:20 AM Anant Thazhemadam
> > > <anant.thazhemadam@xxxxxxxxx> wrote:
> > > > Looks like this bug is no longer valid. I'm not sure which commit seems to have fixed it. Can this be marked as invalid or closed yet?
> > >
> > > You can see on the dashboard (or in mailing list archives) that B K
> > > Karthik tested a patch for this bug in July:
> > > https://syzkaller.appspot.com/bug?extid=72ff2fa98097767b5a27
> > >
> > > So perhaps that patch fixes it? Karthik, did you send it? Was it
> > > merged? Did the commit include the syzbot Reported-by tag?
> > >
> >
> > I did send it. I was taking a u32 spi value and casting it to a
> > pointer to an IP address. Steffen Klassert
> > <steffen.klassert@xxxxxxxxxxx> pointed out to me that the approach i
> > was looking at was completely wrong.
> > https://lkml.org/lkml/2020/7/27/361 is the conversation. hope this
> > helps.
> 
> +Steffen, was there any other fix merged for this?

I think that was already fixed before the sysbot report came in by
commit 8b404f46dd6a ("xfrm: interface: not xfrmi_ipv6/ipip_handler twice")