linux-next build error (6)

linux-next build error (6)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    d26b0e22 Add linux-next specific files for 20191128
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10b94536e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7e1b037422e4486b
dashboard link: https://syzkaller.appspot.com/bug?extid=88f3974342fd0f011404
compiler:       gcc (GCC) 9.0.0 20181231 (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+88f3974342fd0f011404@syzkaller.appspotmail.com

failed to run ["make" "bzImage" "CC=/syzkaller/gcc/bin/gcc" "-j64"]: exit  
status 2

---
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#status for how to communicate with syzbot.

Re: linux-next build error (6)

[Dmitry Vyukov]

On Thu, Nov 28, 2019 at 9:35 AM syzbot
<syzbot+88f3974342fd0f011404@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    d26b0e22 Add linux-next specific files for 20191128
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=10b94536e00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7e1b037422e4486b
> dashboard link: https://syzkaller.appspot.com/bug?extid=88f3974342fd0f011404
> compiler:       gcc (GCC) 9.0.0 20181231 (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+88f3974342fd0f011404@syzkaller.appspotmail.com
>
> failed to run ["make" "bzImage" "CC=/syzkaller/gcc/bin/gcc" "-j64"]: exit
> status 2
>
> ---
> 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#status for how to communicate with syzbot.

syzbot distro does not provide pahole 1.13, so I followed the
suggestion and disabled CONFIG_DEBUG_INFO_BTF:
https://github.com/google/syzkaller/commit/861a5980df642d6b9fb59fda98d5a75a019f5f34
#syz invalid