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to b...@alien8.de, h...@zytor.com, jmat...@google.com, jo...@8bytes.org, k...@vger.kernel.org, linux-...@vger.kernel.org, mi...@redhat.com, pbon...@redhat.com, sean.j.chr...@intel.com, syzkall...@googlegroups.com, tg...@linutronix.de, vkuz...@redhat.com, wanp...@tencent.com, x...@kernel.org
Hello,
syzbot found the following crash on:
HEAD commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://
git.kernel.org..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=17d9bfa9100000
kernel config:
https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656
dashboard link:
https://syzkaller.appspot.com/bug?extid=76004d8cdf5443dcd8e7
compiler: clang version 10.0.0 (
https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
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+76004d...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: null-ptr-deref in kvm_vcpu_halt+0xea/0x110 arch/x86/kvm/x86.c:7546
Write of size 4 at addr 0000000000000000 by task syz-executor.0/11111
CPU: 1 PID: 11111 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1e9/0x30e lib/dump_stack.c:118
__kasan_report mm/kasan/report.c:517 [inline]
kasan_report+0x151/0x1d0 mm/kasan/report.c:530
kvm_vcpu_halt+0xea/0x110 arch/x86/kvm/x86.c:7546
</IRQ>
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 11111 Comm: syz-executor.0 Tainted: G B 5.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1e9/0x30e lib/dump_stack.c:118
panic+0x264/0x7a0 kernel/panic.c:221
end_report mm/kasan/report.c:104 [inline]
__kasan_report mm/kasan/report.c:520 [inline]
kasan_report+0x1c9/0x1d0 mm/kasan/report.c:530
kvm_vcpu_halt+0xea/0x110 arch/x86/kvm/x86.c:7546
</IRQ>
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
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
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