syzbot
WARNING in nested_vmx_vmexit
Status:
upstream: reported on 2026/10/20 10:12
Reported-by: syzbot+7396a93eb054daf46b01@syzkaller.appspotmail.com
First crash: 2d22h, last: 1d19h
Sample crash report:
WARNING: CPU: 1 PID: 6388 at arch/x86/kvm/vmx/nested.c:4582 nested_vmx_vmexit+0x18fb/0x2910 arch/x86/kvm/vmx/nested.c:4582
Modules linked in:
CPU: 1 PID: 6388 Comm: syz.5.390 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:nested_vmx_vmexit+0x18fb/0x2910 arch/x86/kvm/vmx/nested.c:4582
Code: 84 24 00 01 00 00 0f 85 65 03 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 bf 21 56 00 e9 d8 f5 ff ff e8 b5 21 56 00 <0f> 0b e9 ee e7 ff ff 0f 1f 44 00 00 b8 00 44 00 00 0f 78 c0 3e 77
RSP: 0018:ffffc9000334fb40 EFLAGS: 00010283
RAX: ffffffff812301ab RBX: ffff888020f5e7b9 RCX: 0000000000080000
RDX: ffffc900157be000 RSI: 0000000000004291 RDI: 0000000000004292
RBP: ffffc9000334fc90 R08: ffff888020f5c03f R09: 1ffff110041eb807
R10: dffffc0000000000 R11: ffffed10041eb808 R12: ffff888020f5c038
R13: dffffc0000000000 R14: ffff888020f5c000 R15: ffff888020f5c000
FS: 00007fa1f03076c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000006d5000 CR3: 0000000025601000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kvm_check_nested_events arch/x86/kvm/x86.c:9151 [inline]
kvm_vcpu_running arch/x86/kvm/x86.c:10169 [inline]
vcpu_run arch/x86/kvm/x86.c:10191 [inline]
kvm_arch_vcpu_ioctl_run+0x6db/0x1e40 arch/x86/kvm/x86.c:10432
kvm_vcpu_ioctl+0x8f2/0xc10 virt/kvm/kvm_main.c:3895
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa1f20d1559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1f0307028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa1f2358090 RCX: 00007fa1f20d1559
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fa1f2168b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa1f2358128 R14: 00007fa1f2358090 R15: 00007ffe99464548
</TASK>
* Struck through repros no longer work on HEAD.