linux-kernel - Re: [syzbot] WARNING in kthread_bind

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Message-ID: <ZKx8+B3gI9/1g5A3@google.com>
Date:   Mon, 10 Jul 2023 14:49:44 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     syzbot <syzbot+087b7effddeec0697c66@...kaller.appspotmail.com>
Cc:     linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in kthread_bind_mask

Trimmed the Cc list to avoid annoying folks with my thread necromancy.

On Sun, Feb 20, 2022, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    c5d9ae265b10 Merge tag 'for-linus' of git://git.kernel.org..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=11daf74a700000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=da674567f7b6043d
> dashboard link: https://syzkaller.appspot.com/bug?extid=087b7effddeec0697c66
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+087b7effddeec0697c66@...kaller.appspotmail.com
> 
> BTRFS info (device loop3): disk space caching is enabled
> BTRFS info (device loop3): has skinny extents
> ------------[ cut here ]------------

Dropping the "kvm" label as this isn't a KVM bug, but rather something in either
workqueues or sched that KVM often triggers through its use of alloc_workqueue().

#syz set subsystems: kernel