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: 3502 at arch/x86/kvm/vmx/vmx.c:1708 vmx_queue_exception+0x2d2/0x480
Modules linked in:
CPU: 1 PID: 3502 Comm: syz-executor387 Not tainted 5.15.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:vmx_queue_exception+0x2d2/0x480 arch/x86/kvm/vmx/vmx.c:1708
Code: 9e 01 00 00 e8 2f 60 5d 00 eb 0c e8 28 60 5d 00 eb 05 e8 21 60 5d 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f c3 e8 0e 60 5d 00 <0f> 0b e9 a2 fe ff ff 89 f9 80 e1 07 38 c1 0f 8c 55 fd ff ff e8 a5
RSP: 0018:ffffc90002d4f558 EFLAGS: 00010293
RAX: ffffffff8122c1d2 RBX: 0000000000000001 RCX: ffff888018ef0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002d4fc50 R08: ffffffff8122c06e R09: ffffffff810d00ae
R10: 0000000000000002 R11: ffff888018ef0000 R12: ffff888024be0000
R13: dffffc0000000000 R14: 000000000000000e R15: 000000008000080e
FS:  0000555555803380(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000188 CR3: 00000000720a5000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 inject_pending_event arch/x86/kvm/x86.c:9206 [inline]
 vcpu_enter_guest+0x1cca/0x9850 arch/x86/kvm/x86.c:9864
 vcpu_run arch/x86/kvm/x86.c:10136 [inline]
 kvm_arch_vcpu_ioctl_run+0xa5e/0x1f80 arch/x86/kvm/x86.c:10373
 kvm_vcpu_ioctl+0x7f0/0xcf0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3893
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fac9ce846f9
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:00007ffecab85108 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffecab852d8 RCX: 00007fac9ce846f9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000004
RBP: 00007fac9cef8610 R08: 00007ffecab852d8 R09: 00007ffecab852d8
R10: 00007ffecab852d8 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffecab852c8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>