syzbot


KASAN: user-memory-access Read in sync_vmcs02_to_vmcs12

Status: auto-closed as invalid on 2020/10/11 00:19
Subsystems: kvm
[Documentation on labels]
Reported-by: syzbot+961278f56598a876c889@syzkaller.appspotmail.com
First crash: 1413d, last: 1413d
Discussions (1)
Title Replies (including bot) Last reply
KASAN: user-memory-access Read in sync_vmcs02_to_vmcs12 0 (1) 2020/06/16 19:39

Sample crash report:
==================================================================
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

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/06/13 00:18 upstream 7ae77150d94d df590254 .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.