UBSAN: object-size-mismatch in wg_xmit

[Corey Costello]

Yeah, it doesn’t work for me :( 

> On Jan 7, 2021, at 7:42 PM, Eric Light <eric at ericlight.com> wrote:
> 
> Corey - have you tried unsubscribing at the unsubscribe page?  https://linkprotect.cudasvc.com/url?a=https%3a%2f%2flists.zx2c4.com%2fmailman%2foptions%2fwireguard&c=E,1,Axa-ElbX0arA0gS27knqMcMnUXikmpGux0uV7Gv66JniMpXRVVtWNeYE8mu17nQawpfQEodteBfH9tq43ronGkmm07T_Tq9urTmtYLTTK8YwFg,,&typo=1
> 
> Hope this helps,
> 
> E
> 
> --------------------------------------------
> Q: Why is this email five sentences or less?
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> 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
>> 
>>