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: 383 at arch/x86/kvm/x86.c:11241 vcpu_block arch/x86/kvm/x86.c:11241 [inline]
WARNING: CPU: 0 PID: 383 at arch/x86/kvm/x86.c:11241 vcpu_run+0x75e5/0x7830 arch/x86/kvm/x86.c:11285
Modules linked in:
CPU: 0 UID: 0 PID: 383 Comm: syz.2.17 Not tainted syzkaller #0 ebd888673537e6d433689cc680383d43a5383a5c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:vcpu_block arch/x86/kvm/x86.c:11241 [inline]
RIP: 0010:vcpu_run+0x75e5/0x7830 arch/x86/kvm/x86.c:11285
Code: 03 42 0f b6 04 20 84 c0 0f 85 13 02 00 00 44 88 33 31 db 4d 89 ee e9 6e fe ff ff e8 25 a6 69 00 e9 62 fe ff ff e8 1b a6 69 00 <0f> 0b e9 56 fe ff ff e8 0f a6 69 00 48 8b 84 24 a0 00 00 00 42 80
RSP: 0018:ffffc900007ff520 EFLAGS: 00010293
RAX: ffffffff811c57c5 RBX: 00000000fffffff0 RCX: ffff88812a722600
RDX: 0000000000000000 RSI: 00000000fffffff0 RDI: 00000000fffffff0
RBP: ffffc900007ff9b0 R08: ffff88810be4e2e7 R09: 1ffff110217c9c5c
R10: dffffc0000000000 R11: ffffed10217c9c5d R12: ffff888114ff0000
R13: ffff888114ff0038 R14: dffffc0000000000 R15: ffff888114ff025c
FS: 0000555556ebd500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000115112000 CR4: 00000000003526b0
Call Trace:
<TASK>
kvm_arch_vcpu_ioctl_run+0x101a/0x1aa0 arch/x86/kvm/x86.c:11607
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: 0033:0x7fc5d978eec9
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:00007ffcb0f44568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc5d99e5fa0 RCX: 00007fc5d978eec9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fc5d9811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc5d99e5fa0 R14: 00007fc5d99e5fa0 R15: 0000000000000003
</TASK>
---[ end trace 0000000000000000 ]---