From: Sean Christopherson <seanjc@google.com>
To: syzbot <syzbot+106a4f72b0474e1d1b33@syzkaller.appspotmail.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
pbonzini@redhat.com, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [kvm?] WARNING in __kvm_gpc_refresh
Date: Mon, 18 Mar 2024 12:55:43 -0700 [thread overview]
Message-ID: <ZficP63PYEiqZGKO@google.com> (raw)
In-Reply-To: <0000000000005fa5cc0613f1cebd@google.com>
On Mon, Mar 18, 2024, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 277100b3d5fe Merge tag 'block-6.9-20240315' of git://git.k..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=17c96aa5180000
> kernel config: https://syzkaller.appspot.com/x/.config?x=1c6662240382da2
> dashboard link: https://syzkaller.appspot.com/bug?extid=106a4f72b0474e1d1b33
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14358231180000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110ed231180000
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-277100b3.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6872e049b27c/vmlinux-277100b3.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/68ec7230df0f/bzImage-277100b3.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+106a4f72b0474e1d1b33@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 5192 at arch/x86/kvm/../../../virt/kvm/pfncache.c:247 __kvm_gpc_refresh+0x15e2/0x2200 arch/x86/kvm/../../../virt/kvm/pfncache.c:247
The WARN is due to a new sanity check that exposed an old wart. I'll get a patch
posted later today.
next prev parent reply other threads:[~2024-03-18 19:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-18 16:25 [syzbot] [kvm?] WARNING in __kvm_gpc_refresh syzbot
2024-03-18 19:55 ` Sean Christopherson [this message]
2024-03-18 21:25 ` David Woodhouse
2024-03-18 21:34 ` Sean Christopherson
2024-03-18 21:55 ` David Woodhouse
2024-03-19 15:23 ` Sean Christopherson
2024-03-19 15:57 ` David Woodhouse
2024-03-21 10:59 ` Paul Durrant
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