linux-next build error (3)

linux-next build error (3)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    6d93abaf4c5b Add linux-next specific files for 20180723
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10e02f0c400000
dashboard link: https://syzkaller.appspot.com/bug?extid=9118f0a7ae77f4eee4a9
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com



---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
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syzbot.

Re: linux-next build error (3)

[Dmitry Vyukov]

On Mon, Jul 23, 2018 at 1:38 PM, syzbot
<syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    6d93abaf4c5b Add linux-next specific files for 20180723
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=10e02f0c400000
> dashboard link: https://syzkaller.appspot.com/bug?extid=9118f0a7ae77f4eee4a9
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>
> Unfortunately, I don't have any reproducer for this crash yet.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com

+Matthias,

I guess this is caused by one of the following commits, and probably
affects KASAN and similar tools:

commit cc32ad8f559c36ca2433d282aff690a6842a3a27
Date:   Thu Feb 8 12:53:16 2018 -0800

    amdgpu/dc/calcs: Support clang option for stack alignment

commit 37172013fa2e527735ec9eda51a11cfea3af0ff1
Date:   Thu Feb 8 12:53:14 2018 -0800

    amdgpu/dc/calcs: Consolidate redundant CFLAGS



>
> ---
> This bug is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
>
> syzbot will keep track of this bug report. See:
> https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
> syzbot.
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Re: linux-next build error (3)

[Tetsuo Handa]

Dmitry,

Can you temporarily disable config options which are causing this build error?
syzbot is failing to test next-20180723 and next-20180724 due to this problem.

By the way, ".config" at
https://syzkaller.appspot.com/bug?id=bd788040e839b85be53a030f219a2a1e4dc8acd2 is
failing because of empty link.

  <a href="">.config</a>

On 2018/07/23 20:39, Dmitry Vyukov wrote:
> On Mon, Jul 23, 2018 at 1:38 PM, syzbot
> <syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit:    6d93abaf4c5b Add linux-next specific files for 20180723
>> git tree:       linux-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=10e02f0c400000
>> dashboard link: https://syzkaller.appspot.com/bug?extid=9118f0a7ae77f4eee4a9
>> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com
> 
> +Matthias,
> 
> I guess this is caused by one of the following commits, and probably
> affects KASAN and similar tools:
> 
> commit cc32ad8f559c36ca2433d282aff690a6842a3a27
> Date:   Thu Feb 8 12:53:16 2018 -0800
> 
>     amdgpu/dc/calcs: Support clang option for stack alignment
> 
> commit 37172013fa2e527735ec9eda51a11cfea3af0ff1
> Date:   Thu Feb 8 12:53:14 2018 -0800
> 
>     amdgpu/dc/calcs: Consolidate redundant CFLAGS
> 

Re: linux-next build error (3)

[Dmitry Vyukov]

On Tue, Jul 24, 2018 at 1:44 PM, Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp> wrote:
> Dmitry,
>
> Can you temporarily disable config options which are causing this build error?
> syzbot is failing to test next-20180723 and next-20180724 due to this problem.

Do you know what are these configs?


> By the way, ".config" at
> https://syzkaller.appspot.com/bug?id=bd788040e839b85be53a030f219a2a1e4dc8acd2 is
> failing because of empty link.
>
>   <a href="">.config</a>

I will take a look.

> On 2018/07/23 20:39, Dmitry Vyukov wrote:
>> On Mon, Jul 23, 2018 at 1:38 PM, syzbot
>> <syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com> wrote:
>>> Hello,
>>>
>>> syzbot found the following crash on:
>>>
>>> HEAD commit:    6d93abaf4c5b Add linux-next specific files for 20180723
>>> git tree:       linux-next
>>> console output: https://syzkaller.appspot.com/x/log.txt?x=10e02f0c400000
>>> dashboard link: https://syzkaller.appspot.com/bug?extid=9118f0a7ae77f4eee4a9
>>> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
>>>
>>> Unfortunately, I don't have any reproducer for this crash yet.
>>>
>>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>>> Reported-by: syzbot+9118f0a7ae77f4eee4a9@syzkaller.appspotmail.com
>>
>> +Matthias,
>>
>> I guess this is caused by one of the following commits, and probably
>> affects KASAN and similar tools:
>>
>> commit cc32ad8f559c36ca2433d282aff690a6842a3a27
>> Date:   Thu Feb 8 12:53:16 2018 -0800
>>
>>     amdgpu/dc/calcs: Support clang option for stack alignment
>>
>> commit 37172013fa2e527735ec9eda51a11cfea3af0ff1
>> Date:   Thu Feb 8 12:53:14 2018 -0800
>>
>>     amdgpu/dc/calcs: Consolidate redundant CFLAGS
>>