linux-kernel - Re: [syzbot] [kvm?] general protection fault in get_work

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Message-ID: <Zr_Po5Rj7wsDj_BX@zx2c4.com>
Date: Fri, 16 Aug 2024 22:16:03 +0000
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: syzbot <syzbot+0dc211bc2adb944e1fd6@...kaller.appspotmail.com>,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, pabeni@...hat.com,
	syzkaller-bugs@...glegroups.com, wireguard@...ts.zx2c4.com
Subject: Re: [syzbot] [kvm?] general protection fault in get_work_pool (2)

On Fri, Aug 16, 2024 at 11:24:35AM -0700, Sean Christopherson wrote:
> On Mon, Jun 17, 2024, syzbot wrote:
> > Hello,
> > 
> > syzbot found the following issue on:
> > 
> > HEAD commit:    2ccbdf43d5e7 Merge tag 'for-linus' of git://git.kernel.org..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=16f23146980000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=81c0d76ceef02b39
> > dashboard link: https://syzkaller.appspot.com/bug?extid=0dc211bc2adb944e1fd6
> > compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> > userspace arch: i386
> > 
> > Unfortunately, I don't have any reproducer for this issue yet.
> > 
> > Downloadable assets:
> > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2ccbdf43.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/13cdb5bfbafa/vmlinux-2ccbdf43.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/7a14f5d07f81/bzImage-2ccbdf43.xz
> > 
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+0dc211bc2adb944e1fd6@...kaller.appspotmail.com
> 
> See https://lore.kernel.org/all/Zr-Ydj8FBpiqmY_c@google.com for an explanation.
> 
> #syz invalid

Oh. Thanks very much for following up on this. I spent some time puzzling
over it and didn't find a wireguard bug. Glad that turned out to be so.

Jason