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: 4566 at arch/x86/kvm/vmx/vmx.c:1711 vmx_queue_exception+0x2b9/0x470 arch/x86/kvm/vmx/vmx.c:1711
Modules linked in:
CPU: 0 PID: 4566 Comm: syz-executor.0 Not tainted 5.15.184-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 09 91 57 00 eb 0c e8 02 91 57 00 eb 05 e8 fb 90 57 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 e7 90 57 00 <0f> 0b e9 a7 fe ff ff 89 f9 80 e1 07 38 c1 0f 8c 6e fd ff ff e8 6e
RSP: 0018:ffffc9000328f590 EFLAGS: 00010293
RAX: ffffffff81203059 RBX: ffff8880234d0000 RCX: ffff88807be89dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807be89dc0 R09: 0000000000000002
R10: 000000000000000e R11: 0000000000000000 R12: ffff8880234d26fc
R13: dffffc0000000000 R14: 000000000000000e R15: 000000008000080e
FS:  00007fdbc29666c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555aa4929950 CR3: 000000007da5b000 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: 0033:0x7fdbc35e4ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdbc29660c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fdbc3703f80 RCX: 00007fdbc35e4ae9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004
RBP: 00007fdbc363047a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdbc3703f80 R15: 00007ffc6db56728
 </TASK>