UBSAN: object-size-mismatch in wg_xmit

[Phillip McMahon]

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On Fri, 8 Jan 2021 at 01:49, Eric Light <eric at ericlight.com> wrote:
>
> Corey - have you tried unsubscribing at the unsubscribe page?  https://lists.zx2c4.com/mailman/options/wireguard
>
> Hope this helps,
>
> E
>
> --------------------------------------------
> Q: Why is this email five sentences or less?
> A: http://five.sentenc.es
>
> On Fri, 8 Jan 2021, at 13:34, Corey Costello wrote:
> > Get me off this fucking list ffs.
> >
> >
> >
> > > On Jan 7, 2021, at 2:06 PM, Jeffrey Walton <noloader at gmail.com> wrote:
> > >
> > > On Thu, Jan 7, 2021 at 2:03 PM Jason A. Donenfeld <Jason at zx2c4.com> wrote:
> > >>
> > >> On Thu, Jan 7, 2021 at 1:22 PM Dmitry Vyukov <dvyukov at google.com> wrote:
> > >>>
> > >>> On Mon, Dec 21, 2020 at 12:23 PM Jason A. Donenfeld <Jason at zx2c4.com> wrote:
> > >>>>
> > >>>> ...
> > >>>
> > >>> These UBSAN checks were just enabled recently.
> > >>> It's indeed super easy to trigger: 133083 VMs were crashed on this already:
> > >>> https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fsyzkaller.appspot.com%2fbug%3fextid%3d8f90d005ab2d22342b6d&c=E,1,RVpgZsRUCGs2jKlumiMAMnpeOF4QdiW5h8GDIsBJPz-orFNwvwCXnceC9n5Bhr1h-G2EsU0tlC7N4QUpHuF6tIMI7tTnBoRjAo5tT-Bk9-Fhe8CppuOL4mqdkA,,&typo=1
> > >>> So it's one of the top crashers by now.
> > >>
> > >> Ahh, makes sense. So it is easily reproducible after all.
> > >>
> > >> You're still of the opinion that it's a false positive, right? I
> > >> shouldn't spend more cycles on this?
> > >
> > > You might consider making a test build with -fno-lto in case LTO is
> > > mucking things up.
> > >
> > > Google Posts Patches So The Linux Kernel Can Be LTO-Optimized By
> > > Clang, https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.phoronix.com%2fscan.php%3fpage%3dnews_item%26px%3dLinux-Kernel-Clang-LTO-Patches&c=E,1,7u3-jWadklYo8ai_XrPNvjnu46LLAyg0hqsGIaMPaoQ5UxtcNM84jrHUgSg4VciXKk9XVpwgyBwD85LbbW5_j195jSH6RrAej45I1kr_XfQ,&typo=1
> > >
> > > Jeff
> >
> >



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