------------[ cut here ]------------ WARNING: CPU: 1 PID: 489 at arch/x86/kvm/x86.c:8039 emulator_pio_in_out+0x3a7/0x4b0 arch/x86/kvm/x86.c:8039 Modules linked in: CPU: 1 UID: 0 PID: 489 Comm: syz.2.18 Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094 #0 PREEMPT e16ce42b14db585c64cd9d5e9b993f0ded324d12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:emulator_pio_in_out+0x3a7/0x4b0 arch/x86/kvm/x86.c:8039 Code: 38 84 c0 0f 85 f7 00 00 00 8b 45 bc 66 89 03 31 c0 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d e9 0f b1 62 04 cc e8 89 00 66 00 <0f> 0b e9 c9 fc ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e2 fd ff RSP: 0018:ffffc9000135f350 EFLAGS: 00010293 RAX: ffffffff813e4197 RBX: ffffc9000135f440 RCX: ffff88811c2f1140 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000135f3b0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81505450 R12: 0000000000000cf8 R13: 0000000000000001 R14: 0000000000000001 R15: ffff88811c57aa20 FS: 00007faee95f26c0(0000) GS:ffff88826e691000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000005200000c CR3: 000000011bf2e000 CR4: 00000000003526b0 Call Trace: emulator_pio_out+0x41/0x150 arch/x86/kvm/x86.c:8127 kvm_fast_pio_out arch/x86/kvm/x86.c:9258 [inline] kvm_fast_pio+0x140/0x5f0 arch/x86/kvm/x86.c:9328 handle_io+0xfe/0x150 arch/x86/kvm/vmx/vmx.c:5311 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6515 [inline] vmx_handle_exit+0x1187/0x1930 arch/x86/kvm/vmx/vmx.c:6532 vcpu_enter_guest arch/x86/kvm/x86.c:11061 [inline] vcpu_run+0x3f70/0x6760 arch/x86/kvm/x86.c:11219 kvm_arch_vcpu_ioctl_run+0x101b/0x1aa0 arch/x86/kvm/x86.c:11564 kvm_vcpu_ioctl+0x966/0x1070 virt/kvm/kvm_main.c:4466 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0x122/0x1a0 fs/ioctl.c:584 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:584 x64_sys_call+0x1838/0x2fd0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x62/0x160 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7faee878ebe9 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:00007faee95f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007faee89b5fa0 RCX: 00007faee878ebe9 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00007faee8811e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faee89b6038 R14: 00007faee89b5fa0 R15: 00007ffc8e470178 ---[ end trace 0000000000000000 ]---