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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WARNING: CPU: 0 PID: 380 at arch/x86/kvm/lapic.c:3378 kvm_apic_accept_events+0x361/0x480 arch/x86/kvm/lapic.c:3378
Modules linked in:
CPU: 0 UID: 0 PID: 380 Comm: syz.2.17 Not tainted syzkaller #0 f314b4a7c60d1499390e62a22e4d37ca5a327e54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:kvm_apic_accept_events+0x361/0x480 arch/x86/kvm/lapic.c:3378
Code: 85 dd 00 00 00 41 c7 07 00 00 00 00 e9 62 fe ff ff e8 d3 74 62 00 e9 58 fe ff ff e8 c9 74 62 00 e9 4e fe ff ff e8 bf 74 62 00 <0f> 0b e9 28 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 48 fd ff
RSP: 0018:ffffc90000faf4e0 EFLAGS: 00010293
RAX: ffffffff81237861 RBX: 0000000000000000 RCX: ffff888115399300
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc90000faf510 R08: ffff888115399307 R09: 1ffff11022a73260
R10: dffffc0000000000 R11: ffffed1022a73261 R12: dffffc0000000000
R13: ffff888114de7e00 R14: 0000000000000002 R15: 1ffff11022a42470
FS:  0000555564a34500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 00000001150fa000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 vcpu_block arch/x86/kvm/x86.c:11221 [inline]
 vcpu_run+0xa86/0x7260 arch/x86/kvm/x86.c:11260
 kvm_arch_vcpu_ioctl_run+0x101a/0x1aa0 arch/x86/kvm/x86.c:11582
 kvm_vcpu_ioctl+0x96f/0xee0 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fe91c78eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc712fe648 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe91c9d5fa0 RCX: 00007fe91c78eba9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fe91c811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe91c9d5fa0 R14: 00007fe91c9d5fa0 R15: 0000000000000003
 </TASK>
---[ end trace 0000000000000000 ]---