L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
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WARNING: CPU: 1 PID: 4167 at arch/x86/kvm/vmx/vmx.c:1711 vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1711
Modules linked in:
CPU: 1 PID: 4167 Comm: syz-executor209 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1711
Code: 01 00 00 e8 e9 91 57 00 eb 0c e8 e2 91 57 00 eb 05 e8 db 91 57 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c7 91 57 00 <0f> 0b e9 a7 fe ff ff 89 f9 80 e1 07 38 c1 0f 8c 6e fd ff ff e8 8e
RSP: 0018:ffffc90002fdf590 EFLAGS: 00010293
RAX: ffffffff81203059 RBX: ffff8880226b4000 RCX: ffff8880253d8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff8880253d8000 R09: 0000000000000002
R10: 000000000000000e R11: 0000000000000000 R12: ffff8880226b66fc
R13: dffffc0000000000 R14: 000000000000000e R15: 000000008000080e
FS:  000055557d239380(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 00000000705b4000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inject_pending_event arch/x86/kvm/x86.c:9230 [inline]
 vcpu_enter_guest+0x1b69/0x70e0 arch/x86/kvm/x86.c:9887
 vcpu_run arch/x86/kvm/x86.c:10162 [inline]
 kvm_arch_vcpu_ioctl_run+0xdea/0x1f40 arch/x86/kvm/x86.c:10399
 kvm_vcpu_ioctl+0x887/0xb80 virt/kvm/kvm_main.c:3894
 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: 0033:0x7fb0e5ba32f9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffee62fecf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffee62feec8 RCX: 00007fb0e5ba32f9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fb0e5c16610 R08: 00007ffee62feec8 R09: 00007ffee62feec8
R10: 00007ffee62feec8 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffee62feeb8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>