Comment 11 for bug 1966499

I managed to reproduce this with the hyperv_stimer test in kvm-unit-tests with Impish 5.13.0-39, with the identical output spamming in dmesg.

And I can reproduce this with 5.13.0-40

[ 921.874608] ------------[ cut here ]------------
[ 921.874609] WARNING: CPU: 13 PID: 6997 at arch/x86/kvm/vmx/vmx.c:6336 vmx_sync_pir_to_irr+0x9e/0xc0 [kvm_intel]
[ 921.874613] ? xfer_to_guest_mode_work+0xe2/0x110
[ 921.874616] Modules linked in: vhost_net vhost vhost_iotlb tap xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp nft_compat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_counter nf_tables nfnetlink bridge stp llc nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua intel_rapl_msr intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm joydev input_leds ioatdma rapl intel_cstate efi_pstore ipmi_si mei_me mei mac_hid acpi_pad
[ 921.874616] vcpu_run+0x4d/0x220 [kvm]
[ 921.874635] acpi_power_meter sch_fq_codel ipmi_devintf ipmi_msghandler msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid mgag200 i2c_algo_bit drm_kms_helper crct10dif_pclmul syscopyarea crc32_pclmul sysfillrect sysimgblt ghash_clmulni_intel fb_sys_fops ixgbe cec aesni_intel rc_core crypto_simd xfrm_algo cryptd drm ahci dca i2c_i801 xhci_pci mdio libahci i2c_smbus lpc_ich xhci_pci_renesas wmi
[ 921.874664] CPU: 13 PID: 6997 Comm: qemu-system-x86 Tainted: G W I 5.13.0-39-generic #44-Ubuntu
[ 921.874665] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.1008.031920151331 03/19/2015
[ 921.874651] kvm_arch_vcpu_ioctl_run+0xc5/0x4f0 [kvm]
[ 921.874666] RIP: 0010:vmx_sync_pir_to_irr+0x9e/0xc0 [kvm_intel]
[ 921.874671] Code: e8 47 f5 18 00 8b 93 00 03 00 00 89 45 ec 83 e2 20 85 d2 74 dc 48 8b 55 f0 65 48 2b 14 25 28 00 00 00 75 1d 48 8b 5d f8 c9 c3 <0f> 0b eb 87 f0 80 4b 39 40 8b 93 00 03 00 00 8b 45 ec 83 e2 20 eb
[ 921.874673] RSP: 0018:ffffae4d8d107c98 EFLAGS: 00010046
[ 921.874674] RAX: 0000000000000000 RBX: ffff99c552942640 RCX: ffff99c5043a72f0
[ 921.874675] RDX: ffff99c552942640 RSI: 0000000000000001 RDI: ffff99c552942640
[ 921.874676] RBP: ffffae4d8d107cb0 R08: ffff99c86f6a7140 R09: 0000000000027100
[ 921.874677] R10: 0000000042280000 R11: 000000000000000a R12: ffff99c552942640
[ 921.874678] R13: 0000000000000000 R14: ffffae4d8d1a63e0 R15: ffff99c552942640
[ 921.874679] FS: 00007f6ae9be7640(0000) GS:ffff99c86f680000(0000) knlGS:0000000000000000
[ 921.874680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 921.874681] CR2: 0000000000000000 CR3: 000000010b8a6006 CR4: 00000000001726e0
[ 921.874683] Call Trace:
[ 921.874684] <TASK>
[ 921.874684] kvm_vcpu_ioctl+0x243/0x5e0 [kvm]
[ 921.874685] vcpu_enter_guest+0x383/0xf50 [kvm]
[ 921.874720] ? xfer_to_guest_mode_work+0xe2/0x110
[ 921.874709] ? kvm_vm_ioctl+0x364/0x730 [kvm]
[ 921.874738] ? __fget_files+0x86/0xc0
[ 921.874723] vcpu_run+0x4d/0x220 [kvm]
[ 921.874742] __x64_sys_ioctl+0x91/0xc0
[ 921.874744] do_syscall_64+0x61/0xb0
[ 921.874747] ? fput+0x13/0x20
[ 921.874749] ? exit_to_user_mode_prepare+0x37/0xb0
[ 921.874751] ? syscall_exit_to_user_mode+0x27/0x50
[ 921.874752] ? do_syscall_64+0x6e/0xb0
[ 921.874755] ? syscall_exit_to_user_mode+0x27/0x50
[ 921.874756] ? do_syscall_64+0x6e/0xb0
[ 921.874759] ? do_syscall_64+0x6e/0xb0
[ 921.874761] ? do_syscall_64+0x6e/0xb0
[ 921.874764] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 921.874766] RIP: 0033:0x7f6aebce1a2b
[ 921.874767] Code: ff ff ff 85 c0 79 8b 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d5 f3 0f 00 f7 d8 64 89 01 48
[ 921.874769] RSP: 002b:00007f6ae8ffe3f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 921.874771] RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007f6aebce1a2b
[ 921.874772] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000c
[ 921.874774] RBP: 0000557d3b429b90 R08: 0000557d3a4ebff0 R09: 00000000ffffffff
[ 921.874758] kvm_arch_vcpu_ioctl_run+0xc5/0x4f0 [kvm]
[ 921.874776] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
[ 921.874777] R13: 0000000000000001 R14: 0000000000003000 R15: 0000000000000000
[ 921.874779] </TASK>
[ 921.874780] ---[ end trace 5b722d71a78069b1 ]---