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=14f70989100000 kernel config: https://syzkaller.appspot.com/x/.config?x=d195fe572fb15312 dashboard link: https://syzkaller.appspot.com/bug?extid=961278f56598a876c889 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+961278f56598a876c889@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: user-memory-access in vmcs12_guest_cr0 arch/x86/kvm/vmx/nested.c:3545 [inline] BUG: KASAN: user-memory-access in sync_vmcs02_to_vmcs12+0x16fb/0x1a40 arch/x86/kvm/vmx/nested.c:3960 Read of size 18446744071694194346 at addr 0000000001617928 by task systemd-udevd/3877 CPU: 1 PID: 3877 Comm: systemd-udevd 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+0x188/0x20d lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:517 [inline] kasan_report.cold+0x5/0x37 mm/kasan/report.c:530 vmcs12_guest_cr0 arch/x86/kvm/vmx/nested.c:3545 [inline] sync_vmcs02_to_vmcs12+0x16fb/0x1a40 arch/x86/kvm/vmx/nested.c:3960 </IRQ> ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3877 Comm: systemd-udevd 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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 end_report+0x4d/0x53 mm/kasan/report.c:104 __kasan_report mm/kasan/report.c:520 [inline] kasan_report.cold+0xd/0x37 mm/kasan/report.c:530 vmcs12_guest_cr0 arch/x86/kvm/vmx/nested.c:3545 [inline] sync_vmcs02_to_vmcs12+0x16fb/0x1a40 arch/x86/kvm/vmx/nested.c:3960 </IRQ> Shutting down cpus with NMI Kernel Offset: disabled --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
