kvm_intel: 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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kvm_is_error_gpa(gpa) == kvm_is_error_hva(uhva)
WARNING: arch/x86/kvm/../../../virt/kvm/pfncache.c:267 at __kvm_gpc_refresh+0x1513/0x1710 virt/kvm/pfncache.c:267, CPU#0: syz.0.17/5834
Modules linked in:
CPU: 0 UID: 0 PID: 5834 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__kvm_gpc_refresh+0x1513/0x1710 virt/kvm/pfncache.c:267
Code: c6 05 50 d9 79 0e 01 48 c7 c7 6c 2b 97 8d be 43 04 00 00 48 c7 c2 40 43 62 8b e8 a8 db 60 00 e9 7e ee ff ff e8 2e 35 85 00 90 <0f> 0b 90 bb ea ff ff ff 49 bf 00 00 00 00 00 fc ff df e9 4b f6 ff
RSP: 0018:ffffc900015cf1a0 EFLAGS: 00010293
RAX: ffffffff81406e82 RBX: ffff888000000000 RCX: ffff888031e25dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015cf330 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1fa1890 R12: 1ffff920002b9e48
R13: ffff888022fa1490 R14: ffff888000000000 R15: ffffffffffffff01
FS:  0000555595545500(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64407337e0 CR3: 0000000044ec4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kvm_gpc_refresh+0xe4/0x110 virt/kvm/pfncache.c:382
 kvm_xen_set_evtchn+0x14f/0x220 arch/x86/kvm/xen.c:1952
 kvm_xen_hvm_evtchn_send+0x120/0x1e0 arch/x86/kvm/xen.c:2043
 kvm_arch_vm_ioctl+0xfb3/0x1a10 arch/x86/kvm/x86.c:4639
 kvm_vm_ioctl+0x8fa/0xd30 virt/kvm/kvm_main.c:5389
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f644085de99
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:00007ffef70bedb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6440ae5fa0 RCX: 00007f644085de99
RDX: 0000200000000980 RSI: 00000000400caed0 RDI: 0000000000000004
RBP: 00007f64408f3eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6440ae5fac R14: 00007f6440ae5fa0 R15: 00007f6440ae5fa0
 </TASK>