Path: csiph.com!weretis.net!feeder8.news.weretis.net!srl.newsdeef.eu!news.corradoroberto.it!diesel.cu.mi.it!bofh.it!news.nic.it!robomod From: Salvatore Bonaccorso Newsgroups: linux.debian.bugs.dist,linux.debian.kernel Subject: Bug#1135235: linux-image-6.19.13+deb14-amd64: Reoccuring host crash "Invalid SPTE change" with gaming win kvm/qemu guest and device passthrough Date: Tue, 05 May 2026 20:30:01 +0200 Message-ID: References: X-Original-To: Maximilian Senftleben , 1135235@bugs.debian.org X-Mailbox-Line: From debian-bugs-dist-request@lists.debian.org Tue May 5 18:25:12 2026 Old-Return-Path: X-Spam-Flag: NO X-Spam-Score: -1.699 Reply-To: Salvatore Bonaccorso , 1135235@bugs.debian.org Resent-To: debian-bugs-dist@lists.debian.org Resent-Cc: debian-kernel@lists.debian.org X-Debian-Pr-Message: followup 1135235 X-Debian-Pr-Package: src:linux X-Debian-Pr-Source: linux MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable X-Debian-User: carnil X-Debian-Message: from BTS X-Mailing-List: archive/latest/1968009 List-ID: List-URL: Approved: robomod@news.nic.it Lines: 453 Organization: linux.* mail to news gateway Sender: robomod@news.nic.it X-Original-Date: Tue, 5 May 2026 20:22:34 +0200 X-Original-Message-ID: X-Original-References: <177749023441.304242.8022456530166067549.reportbug@mspc2024debian.lan> <177749023441.304242.8022456530166067549.reportbug@mspc2024debian.lan> Xref: csiph.com linux.debian.bugs.dist:1292345 linux.debian.kernel:92302 Control: tags -1 + moreinfo On Wed, Apr 29, 2026 at 09:17:14PM +0200, Maximilian Senftleben wrote: > Package: src:linux > Version: 6.19.13-1 > Severity: important >=20 > Dear Maintainer, >=20 > - I have a Windows kvm/qemu guest that uses device passthrough for my GPU. > - Sometimes while playing the host system crashes/freezes, this only happ= ens > during load/gaming, and sometimes 1-2 times a day, sometimes not at all. >=20 >=20 > System: > Linux myhost 6.19.13+deb14-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.19.13-1 > (2026-04-18) x86_64 GNU/Linux >=20 > CPU: > vendor_id : GenuineIntel > cpu family : 6 > model : 183 > model name : Intel(R) Core(TM) i5-14400 >=20 >=20 >=20 > -- Package-specific info: > ** Kernel log: boot messages should be attached >=20 > ** Model information > sys_vendor: Micro-Star International Co., Ltd. > product_name: MS-7D96 > product_version: 2.0 > chassis_vendor: Micro-Star International Co., Ltd. > chassis_version: 2.0 > bios_vendor: American Megatrends International, LLC. > bios_version: A.B0 > board_vendor: Micro-Star International Co., Ltd. > board_name: MAG B760 TOMAHAWK WIFI (MS-7D96) > board_version: 2.0 >=20 > ** Configuration for modprobe: > blacklist nouveau > blacklist arkfb > blacklist aty128fb > blacklist atyfb > blacklist radeonfb > blacklist cirrusfb > blacklist cyber2000fb > blacklist kyrofb > blacklist matroxfb_base > blacklist mb862xxfb > blacklist neofb > blacklist pm2fb > blacklist pm3fb > blacklist s3fb > blacklist savagefb > blacklist sisfb > blacklist tdfxfb > blacklist tridentfb > blacklist vt8623fb > blacklist microcode > install nouveau /bin/false > options snd_pcsp index=3D-2 > options cx88_alsa index=3D-2 > options snd_atiixp_modem index=3D-2 > options snd_intel8x0m index=3D-2 > options snd_via82xx_modem index=3D-2 > options snd_hda_intel power_save=3D0 > options nouveau modeset=3D0 > options kvm ignore_msrs=3D1 report_ignored_msrs=3D0 > options md_mod start_ro=3D1 > options bonding max_bonds=3D0 > options dummy numdummies=3D0 > options ifb numifbs=3D0 > options vfio_pci ids=3D10de:2783,10de:22bc > [...] >=20 > Apr 29 12:10:33 myhost kernel: kvm: Invalid SPTE change: cannot replace a= present leaf > SPTE with another present leaf SPT= E mapping a > different PFN! > as_id: 0 gfn: 80ec33 old_spte: 860= 000aae3d00bc8 new_spte: 86000009e3d00b77 level: 1 > Apr 29 12:10:33 myhost kernel: ------------[ cut here ]------------ > Apr 29 12:10:33 myhost kernel: kernel BUG at arch/x86/kvm/mmu/tdp_mmu.c:6= 00! > Apr 29 12:10:33 myhost kernel: Oops: invalid opcode: 0000 [#1] SMP NOPTI > Apr 29 12:10:33 myhost kernel: CPU: 7 UID: 1000 PID: 8419 Comm: CPU 2/KVM= Not tainted 6.19.13+deb14-amd64 #1 PREEMPT(lazy) Debian 6.19.13-1=20 > Apr 29 12:10:33 myhost kernel: Hardware name: Micro-Star International Co= =2E, Ltd. MS-7D96/MAG B760 TOMAHAWK WIFI (MS-7D96), BIOS A.B0 10/07/2024 > Apr 29 12:10:33 myhost kernel: RIP: 0010:handle_changed_spte.cold+0x1d/0x= 84 [kvm] > Apr 29 12:10:33 myhost kernel: Code: fb c1 4c 8b 44 24 78 48 8b 0c 24 eb = b0 48 8b 14 24 8b 74 24 18 45 89 e9 4d 89 e0 48 89 e9 48 c7 c7 98 6d cf c1 = e8 2d 49 69 c1 <0f> 0b 48 63 d1 be 01 00 00 00 4c 89 54 24 40 48 c7 c7 20 6= 5 e0 c1 > Apr 29 12:10:33 myhost kernel: RSP: 0018:ffffd100808b78d8 EFLAGS: 00010246 > Apr 29 12:10:33 myhost kernel: RAX: 00000000000000c8 RBX: ffff8eb26206200= 0 RCX: 0000000000000000 > Apr 29 12:10:33 myhost kernel: RDX: 0000000000000000 RSI: 000000000000000= 1 RDI: ffff8ebf7f5dd2c0 > Apr 29 12:10:33 myhost kernel: RBP: 860000aae3d00bc8 R08: 000000000000000= 0 R09: ffffd100808b7780 > Apr 29 12:10:33 myhost kernel: R10: ffffffff850dbfe8 R11: 00000000ffffeff= f R12: 86000009e3d00b77 > Apr 29 12:10:33 myhost kernel: R13: 0000000000000001 R14: 00000000009e3d0= 0 R15: 0000000000000001 > Apr 29 12:10:33 myhost kernel: FS: 00007f23e5dff6c0(0000) GS:ffff8ebff99= 66000(0000) knlGS:ffffde0104510000 > Apr 29 12:10:33 myhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008= 0050033 > Apr 29 12:10:33 myhost kernel: CR2: 0000016ddcd2e000 CR3: 000000017fe6b00= 4 CR4: 0000000000f72ef0 > Apr 29 12:10:33 myhost kernel: PKRU: 55555554 > Apr 29 12:10:33 myhost kernel: Call Trace: > Apr 29 12:10:33 myhost kernel: > Apr 29 12:10:33 myhost kernel: kvm_tdp_mmu_map+0x642/0x890 [kvm] > Apr 29 12:10:33 myhost kernel: ? __pfx_handle_ept_violation+0x10/0x10 [k= vm_intel] > Apr 29 12:10:33 myhost kernel: kvm_tdp_page_fault+0xc4/0xf0 [kvm] > Apr 29 12:10:33 myhost kernel: kvm_mmu_do_page_fault+0x1d9/0x210 [kvm] > Apr 29 12:10:33 myhost kernel: kvm_mmu_page_fault+0x7e/0x790 [kvm] > Apr 29 12:10:33 myhost kernel: ? asm_fred_entry_from_kvm+0x58/0x60 > Apr 29 12:10:33 myhost kernel: ? vmx_vmexit+0x9d/0xd0 [kvm_intel] > Apr 29 12:10:33 myhost kernel: ? __pfx_handle_ept_violation+0x10/0x10 [k= vm_intel] > Apr 29 12:10:33 myhost kernel: vmx_handle_exit+0x14f/0x8f0 [kvm_intel] > Apr 29 12:10:33 myhost kernel: kvm_arch_vcpu_ioctl_run+0x91e/0x18e0 [kvm] > Apr 29 12:10:33 myhost kernel: kvm_vcpu_ioctl+0x2e4/0xa00 [kvm] > Apr 29 12:10:33 myhost kernel: ? vfio_pci_rw+0xa3/0x1a0 [vfio_pci_core] > Apr 29 12:10:33 myhost kernel: __x64_sys_ioctl+0x97/0xe0 > Apr 29 12:10:33 myhost kernel: do_syscall_64+0x81/0x5e0 > Apr 29 12:10:33 myhost kernel: ? __x64_sys_pread64+0xb0/0xd0 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0xbe/0x5e0 > Apr 29 12:10:33 myhost kernel: ? kvm_on_user_return+0x59/0xc0 [kvm] > Apr 29 12:10:33 myhost kernel: ? __x64_sys_ioctl+0xb1/0xe0 > Apr 29 12:10:33 myhost kernel: ? fire_user_return_notifiers+0x37/0x60 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0x2b5/0x5e0 > Apr 29 12:10:33 myhost kernel: ? count_memcg_events+0xd6/0x210 > Apr 29 12:10:33 myhost kernel: ? handle_mm_fault+0x1d6/0x2d0 > Apr 29 12:10:33 myhost kernel: ? do_user_addr_fault+0x2b4/0x7b0 > Apr 29 12:10:33 myhost kernel: ? irqentry_exit+0x6e/0x570 > Apr 29 12:10:33 myhost kernel: ? exc_page_fault+0x7e/0x1a0 > Apr 29 12:10:33 myhost kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e > Apr 29 12:10:33 myhost kernel: RIP: 0033:0x7f2c02368d3b > Apr 29 12:10:33 myhost kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 = 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 = 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 2= 8 00 00 > Apr 29 12:10:33 myhost kernel: RSP: 002b:00007f23e5dfe5c0 EFLAGS: 0000024= 6 ORIG_RAX: 0000000000000010 > Apr 29 12:10:33 myhost kernel: RAX: ffffffffffffffda RBX: 000055e177ba517= 0 RCX: 00007f2c02368d3b > Apr 29 12:10:33 myhost kernel: RDX: 0000000000000000 RSI: 000000000000ae8= 0 RDI: 0000000000000028 > Apr 29 12:10:33 myhost kernel: RBP: 000000000000ae80 R08: 000055e146fe70d= 0 R09: 0000000000000004 > Apr 29 12:10:33 myhost kernel: R10: 0000070000000000 R11: 000000000000024= 6 R12: 0000000000000000 > Apr 29 12:10:33 myhost kernel: R13: 0000000000000006 R14: 000000000000007= 1 R15: 0000000000000000 > Apr 29 12:10:33 myhost kernel: > Apr 29 12:10:33 myhost kernel: Modules linked in: vhost_net vhost vhost_i= otlb tap tun rfcomm snd_seq_dummy snd_hrtimer snd_seq xt_CHECKSUM xt_MASQUE= RADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp nft_compat x_tables n= ft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br= idge stp llc sunrpc uinput qrtr cmac algif_hash algif_skcipher af_alg bnep = dm_crypt hid_corsair joydev snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl snd= _sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt snd_sof_in= tel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda s= oundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_hda_codec_intelhdmi snd= _sof snd_hda_codec_hdmi intel_rapl_msr intel_rapl_common iwlmvm snd_sof_uti= ls snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks intel_uncore_fre= quency soundwire_generic_allocation intel_uncore_frequency_common snd_soc_s= dw_utils snd_soc_acpi snd_hda_codec_alc662 x86_pkg_temp_thermal crc8 intel_= powerclamp snd_hda_codec_realtek_lib uvcvideo soundwire_bus coretemp mac802= 11 > Apr 29 12:10:33 myhost kernel: snd_hda_codec_generic videobuf2_vmalloc s= nd_soc_sdca uvc videobuf2_memops snd_usb_audio videobuf2_v4l2 snd_soc_avs v= ideodev snd_soc_hda_codec kvm_intel snd_hda_intel snd_usbmidi_lib snd_hda_e= xt_core snd_rawmidi snd_hda_codec videobuf2_common snd_seq_device nls_ascii= mc hid_generic snd_soc_core nls_cp437 libarc4 iTCO_wdt snd_hda_core vfat i= ntel_pmc_bxt kvm fat mei_hdcp mei_pxp spd5118 snd_intel_dspcfg iTCO_vendor_= support snd_compress iwlwifi snd_intel_sdw_acpi watchdog snd_pcm_dmaengine = snd_hwdep rapl snd_pcm intel_cstate r8169 battery snd_timer cfg80211 intel_= uncore wmi_bmof mxm_wmi snd mei_me realtek pcspkr i2c_i801 i2c_smbus soundc= ore mei fan btusb intel_pmc_core btmtk uas btrtl btbcm btintel pmt_telemetr= y serial_multi_instantiate usb_storage bluetooth pmt_discovery pmt_class in= tel_pmc_ssram_telemetry acpi_tad acpi_pad usbhid ecdh_generic hid button ev= dev sg rfkill binfmt_misc dm_mod efi_pstore nfnetlink xe drm_ttm_helper drm= _suballoc_helper gpu_sched drm_gpuvm drm_exec configfs drm_gpusvm_helper ex= t4 > Apr 29 12:10:33 myhost kernel: crc16 mbcache jbd2 crc32c_cryptoapi i915 = drm_client_lib sd_mod i2c_algo_bit drm_buddy ttm drm_display_helper ahci dr= m_kms_helper libahci xhci_pci libata xhci_hcd drm nvme nvme_core usbcore sc= si_mod nvme_keyring cec nvme_auth video ghash_clmulni_intel hkdf rc_core sc= si_common intel_vsec usb_common wmi pinctrl_alderlake vfio_pci vfio_pci_cor= e irqbypass vfio_iommu_type1 vfio parport_pc lp ppdev parport i2c_dev msr e= fivarfs autofs4 aesni_intel > Apr 29 12:10:33 myhost kernel: ---[ end trace 0000000000000000 ]--- > Apr 29 12:10:33 myhost kernel: kvm: get_mmio_spte: reserved bits set on M= MU-present spte, addr 0x80ec3098c, hierarchy: > Apr 29 12:10:33 myhost kernel: kvm: ------ spte =3D 0x8000000109193907 le= vel =3D 4, rsvd bits =3D 0xfff80000000f8 > Apr 29 12:10:33 myhost kernel: kvm: ------ spte =3D 0x80000008d8b33907 le= vel =3D 3, rsvd bits =3D 0xfff8000000078 > Apr 29 12:10:33 myhost kernel: kvm: ------ spte =3D 0x8000000371e37907 le= vel =3D 2, rsvd bits =3D 0xfff8000000078 > Apr 29 12:10:33 myhost kernel: kvm: ------ spte =3D 0x86000004e3cfdb26 le= vel =3D 1, rsvd bits =3D 0xfff8000000000 > Apr 29 12:10:33 myhost kernel: ------------[ cut here ]------------ > Apr 29 12:10:33 myhost kernel: WARNING: arch/x86/kvm/mmu/mmu.c:4452 at kv= m_mmu_page_fault.cold+0xc7/0xe4 [kvm], CPU#11: CPU 4/KVM/8421 > Apr 29 12:10:33 myhost kernel: Modules linked in: vhost_net vhost vhost_i= otlb tap tun rfcomm snd_seq_dummy snd_hrtimer snd_seq xt_CHECKSUM xt_MASQUE= RADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp nft_compat x_tables n= ft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables br= idge stp llc sunrpc uinput qrtr cmac algif_hash algif_skcipher af_alg bnep = dm_crypt hid_corsair joydev snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl snd= _sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt snd_sof_in= tel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda s= oundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_hda_codec_intelhdmi snd= _sof snd_hda_codec_hdmi intel_rapl_msr intel_rapl_common iwlmvm snd_sof_uti= ls snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks intel_uncore_fre= quency soundwire_generic_allocation intel_uncore_frequency_common snd_soc_s= dw_utils snd_soc_acpi snd_hda_codec_alc662 x86_pkg_temp_thermal crc8 intel_= powerclamp snd_hda_codec_realtek_lib uvcvideo soundwire_bus coretemp mac802= 11 > Apr 29 12:10:33 myhost kernel: snd_hda_codec_generic videobuf2_vmalloc s= nd_soc_sdca uvc videobuf2_memops snd_usb_audio videobuf2_v4l2 snd_soc_avs v= ideodev snd_soc_hda_codec kvm_intel snd_hda_intel snd_usbmidi_lib snd_hda_e= xt_core snd_rawmidi snd_hda_codec videobuf2_common snd_seq_device nls_ascii= mc hid_generic snd_soc_core nls_cp437 libarc4 iTCO_wdt snd_hda_core vfat i= ntel_pmc_bxt kvm fat mei_hdcp mei_pxp spd5118 snd_intel_dspcfg iTCO_vendor_= support snd_compress iwlwifi snd_intel_sdw_acpi watchdog snd_pcm_dmaengine = snd_hwdep rapl snd_pcm intel_cstate r8169 battery snd_timer cfg80211 intel_= uncore wmi_bmof mxm_wmi snd mei_me realtek pcspkr i2c_i801 i2c_smbus soundc= ore mei fan btusb intel_pmc_core btmtk uas btrtl btbcm btintel pmt_telemetr= y serial_multi_instantiate usb_storage bluetooth pmt_discovery pmt_class in= tel_pmc_ssram_telemetry acpi_tad acpi_pad usbhid ecdh_generic hid button ev= dev sg rfkill binfmt_misc dm_mod efi_pstore nfnetlink xe drm_ttm_helper drm= _suballoc_helper gpu_sched drm_gpuvm drm_exec configfs drm_gpusvm_helper ex= t4 > Apr 29 12:10:33 myhost kernel: crc16 mbcache jbd2 crc32c_cryptoapi i915 = drm_client_lib sd_mod i2c_algo_bit drm_buddy ttm drm_display_helper ahci dr= m_kms_helper libahci xhci_pci libata xhci_hcd drm nvme nvme_core usbcore sc= si_mod nvme_keyring cec nvme_auth video ghash_clmulni_intel hkdf rc_core sc= si_common intel_vsec usb_common wmi pinctrl_alderlake vfio_pci vfio_pci_cor= e irqbypass vfio_iommu_type1 vfio parport_pc lp ppdev parport i2c_dev msr e= fivarfs autofs4 aesni_intel > Apr 29 12:10:33 myhost kernel: CPU: 11 UID: 1000 PID: 8421 Comm: CPU 4/KV= M Tainted: G D 6.19.13+deb14-amd64 #1 PREEMPT(lazy) Debia= n 6.19.13-1=20 > Apr 29 12:10:33 myhost kernel: Tainted: [D]=3DDIE > Apr 29 12:10:33 myhost kernel: Hardware name: Micro-Star International Co= =2E, Ltd. MS-7D96/MAG B760 TOMAHAWK WIFI (MS-7D96), BIOS A.B0 10/07/2024 > Apr 29 12:10:33 myhost kernel: RIP: 0010:kvm_mmu_page_fault.cold+0xc7/0xe= 4 [kvm] > Apr 29 12:10:33 myhost kernel: Code: 60 26 e0 c1 e8 a5 8e fb c1 44 89 ea = 48 89 d9 4c 89 f6 48 c7 c7 70 67 cf c1 e8 20 50 69 c1 48 83 ed 08 45 89 fd = e9 6e ff ff ff <0f> 0b b8 ea ff ff ff e9 47 10 fe ff 48 89 de 48 c7 c7 80 2= 6 e0 c1 > Apr 29 12:10:33 myhost kernel: RSP: 0018:ffffd100867db930 EFLAGS: 00010202 > Apr 29 12:10:33 myhost kernel: RAX: 000000000000004c RBX: 000fff800000000= 0 RCX: 0000000000000027 > Apr 29 12:10:33 myhost kernel: RDX: 0000000000000000 RSI: 000000000000000= 1 RDI: ffff8ebf7f6dd2c0 > Apr 29 12:10:33 myhost kernel: RBP: ffffd100867db988 R08: 000000000000000= 0 R09: ffffd100867db7d8 > Apr 29 12:10:33 myhost kernel: R10: ffffffff850dbfe8 R11: 00000000ffffeff= f R12: 0000000000000001 > Apr 29 12:10:33 myhost kernel: R13: 0000000000000000 R14: 86000004e3cfdb2= 6 R15: 0000000000000000 > Apr 29 12:10:33 myhost kernel: FS: 00007f23cffff6c0(0000) GS:ffff8ebff9a= 66000(0000) knlGS:ffffde01045e6000 > Apr 29 12:10:33 myhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008= 0050033 > Apr 29 12:10:33 myhost kernel: CR2: 0000016dcbc5c000 CR3: 000000017fe6b00= 3 CR4: 0000000000f72ef0 > Apr 29 12:10:33 myhost kernel: PKRU: 55555554 > Apr 29 12:10:33 myhost kernel: Call Trace: > Apr 29 12:10:33 myhost kernel: > Apr 29 12:10:33 myhost kernel: ? __kvm_io_bus_write+0x28/0xb0 [kvm] > Apr 29 12:10:33 myhost kernel: vmx_handle_exit+0x81a/0x8f0 [kvm_intel] > Apr 29 12:10:33 myhost kernel: kvm_arch_vcpu_ioctl_run+0x91e/0x18e0 [kvm] > Apr 29 12:10:33 myhost kernel: kvm_vcpu_ioctl+0x2e4/0xa00 [kvm] > Apr 29 12:10:33 myhost kernel: ? __kvm_io_bus_write+0x28/0xb0 [kvm] > Apr 29 12:10:33 myhost kernel: __x64_sys_ioctl+0x97/0xe0 > Apr 29 12:10:33 myhost kernel: do_syscall_64+0x81/0x5e0 > Apr 29 12:10:33 myhost kernel: ? kvm_arch_vcpu_ioctl_run+0x22d/0x18e0 [k= vm] > Apr 29 12:10:33 myhost kernel: ? kvm_vcpu_ioctl+0x275/0xa00 [kvm] > Apr 29 12:10:33 myhost kernel: ? kvm_on_user_return+0x59/0xc0 [kvm] > Apr 29 12:10:33 myhost kernel: ? __x64_sys_ioctl+0xb1/0xe0 > Apr 29 12:10:33 myhost kernel: ? fire_user_return_notifiers+0x37/0x60 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0x2b5/0x5e0 > Apr 29 12:10:33 myhost kernel: ? kvm_on_user_return+0x59/0xc0 [kvm] > Apr 29 12:10:33 myhost kernel: ? __x64_sys_ioctl+0xb1/0xe0 > Apr 29 12:10:33 myhost kernel: ? fire_user_return_notifiers+0x37/0x60 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0x2b5/0x5e0 > Apr 29 12:10:33 myhost kernel: ? fire_user_return_notifiers+0x37/0x60 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0x2b5/0x5e0 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0xbe/0x5e0 > Apr 29 12:10:33 myhost kernel: ? do_futex+0xc5/0x190 > Apr 29 12:10:33 myhost kernel: ? __x64_sys_futex+0x12d/0x220 > Apr 29 12:10:33 myhost kernel: ? kvm_on_user_return+0x59/0xc0 [kvm] > Apr 29 12:10:33 myhost kernel: ? __x64_sys_ioctl+0xb1/0xe0 > Apr 29 12:10:33 myhost kernel: ? do_syscall_64+0x245/0x5e0 > Apr 29 12:10:33 myhost kernel: ? __irq_exit_rcu+0x3d/0xe0 > Apr 29 12:10:33 myhost kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e > Apr 29 12:10:33 myhost kernel: RIP: 0033:0x7f2c02368d3b > Apr 29 12:10:33 myhost kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 = 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 = 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 2= 8 00 00 > Apr 29 12:10:33 myhost kernel: RSP: 002b:00007f23cfffe5c0 EFLAGS: 0000024= 6 ORIG_RAX: 0000000000000010 > Apr 29 12:10:33 myhost kernel: RAX: ffffffffffffffda RBX: 000055e177bb881= 0 RCX: 00007f2c02368d3b > Apr 29 12:10:33 myhost kernel: RDX: 0000000000000000 RSI: 000000000000ae8= 0 RDI: 000000000000002c > Apr 29 12:10:33 myhost kernel: RBP: 000000000000ae80 R08: 000055e146fe70d= 0 R09: 0000000000000004 > Apr 29 12:10:33 myhost kernel: R10: 000055e1797d3da0 R11: 000000000000024= 6 R12: 0000000000000000 > Apr 29 12:10:33 myhost kernel: R13: 0000000000000006 R14: 000000000000060= 8 R15: 0000000000000002 > Apr 29 12:10:33 myhost kernel: > Apr 29 12:10:33 myhost kernel: ---[ end trace 0000000000000000 ]--- > Apr 29 12:10:33 myhost kernel: RIP: 0010:handle_changed_spte.cold+0x1d/0x= 84 [kvm] > Apr 29 12:10:33 myhost kernel: Code: fb c1 4c 8b 44 24 78 48 8b 0c 24 eb = b0 48 8b 14 24 8b 74 24 18 45 89 e9 4d 89 e0 48 89 e9 48 c7 c7 98 6d cf c1 = e8 2d 49 69 c1 <0f> 0b 48 63 d1 be 01 00 00 00 4c 89 54 24 40 48 c7 c7 20 6= 5 e0 c1 > Apr 29 12:10:33 myhost kernel: RSP: 0018:ffffd100808b78d8 EFLAGS: 00010246 > Apr 29 12:10:33 myhost kernel: RAX: 00000000000000c8 RBX: ffff8eb26206200= 0 RCX: 0000000000000000 > Apr 29 12:10:33 myhost kernel: RDX: 0000000000000000 RSI: 000000000000000= 1 RDI: ffff8ebf7f5dd2c0 > Apr 29 12:10:33 myhost kernel: RBP: 860000aae3d00bc8 R08: 000000000000000= 0 R09: ffffd100808b7780 > Apr 29 12:10:33 myhost kernel: R10: ffffffff850dbfe8 R11: 00000000ffffeff= f R12: 86000009e3d00b77 > Apr 29 12:10:33 myhost kernel: R13: 0000000000000001 R14: 00000000009e3d0= 0 R15: 0000000000000001 > Apr 29 12:10:33 myhost kernel: FS: 00007f23e5dff6c0(0000) GS:ffff8ebff99= 66000(0000) knlGS:ffffde0104510000 > Apr 29 12:10:33 myhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008= 0050033 > Apr 29 12:10:33 myhost kernel: CR2: 0000016ddcd2e000 CR3: 000000017fe6b00= 4 CR4: 0000000000f72ef0 > Apr 29 12:10:33 myhost kernel: PKRU: 55555554 > Apr 29 12:10:33 myhost kernel: note: CPU 2/KVM[8419] exited with preempt_= count 1 > Apr 29 12:10:34 myhost looking-glass-client.desktop[17000]: 01:08:26.337 = [I] main.c:1751 | lg_run | Waiting for= the host to restart... > Apr 29 12:10:54 myhost kernel: rcu: INFO: rcu_preempt self-detected stall= on CPU > Apr 29 12:10:54 myhost kernel: rcu: 15-....: (5250 ticks this GP)= idle=3Ddce4/1/0x4000000000000000 softirq=3D753021/753022 fqs=3D2223 > Apr 29 12:10:54 myhost kernel: rcu: (t=3D5251 jiffies g=3D1262685= q=3D2029 ncpus=3D16) > Apr 29 12:10:54 myhost kernel: CPU: 15 UID: 1000 PID: 8403 Comm: qemu-sys= tem-x86 Tainted: G D W 6.19.13+deb14-amd64 #1 PREEMPT(lazy) = Debian 6.19.13-1=20 > Apr 29 12:10:54 myhost kernel: Tainted: [D]=3DDIE, [W]=3DWARN > Apr 29 12:10:54 myhost kernel: Hardware name: Micro-Star International Co= =2E, Ltd. MS-7D96/MAG B760 TOMAHAWK WIFI (MS-7D96), BIOS A.B0 10/07/2024 > Apr 29 12:10:54 myhost kernel: RIP: 0010:queued_write_lock_slowpath+0x63/= 0x130 > Apr 29 12:10:54 myhost kernel: Code: ef c6 07 00 0f 1f 00 0f 1f 44 00 00 = 5b 5d c3 cc cc cc cc f0 81 0b 00 01 00 00 ba ff 00 00 00 8b 03 3d 00 01 00 = 00 74 0b f3 90 <8b> 03 3d 00 01 00 00 75 f5 b8 00 01 00 00 f0 0f b1 13 74 c= 0 eb df > Apr 29 12:10:54 myhost kernel: RSP: 0018:ffffd10086e07920 EFLAGS: 00000206 > Apr 29 12:10:54 myhost kernel: RAX: 0000000000000300 RBX: ffff8eb26206200= 0 RCX: 0000000000000000 > Apr 29 12:10:54 myhost kernel: RDX: 00000000000000ff RSI: 00007f23d416571= 8 RDI: ffff8eb262062000 > Apr 29 12:10:54 myhost kernel: RBP: ffff8eb262062004 R08: ffffd1008a95500= 8 R09: 00007fff14e314d0 > Apr 29 12:10:54 myhost kernel: R10: 0000000000000000 R11: 000000000000000= 0 R12: ffff8eb262062000 > Apr 29 12:10:54 myhost kernel: R13: ffffd10086e079d8 R14: ffffd1008a95500= 8 R15: 0000000000000008 > Apr 29 12:10:54 myhost kernel: FS: 00007f2c0052e300(0000) GS:ffff8ebff9b= 66000(0000) knlGS:0000000000000000 > Apr 29 12:10:54 myhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008= 0050033 > Apr 29 12:10:54 myhost kernel: CR2: 0000016e38b10000 CR3: 000000017fe6b00= 4 CR4: 0000000000f72ef0 > Apr 29 12:10:54 myhost kernel: PKRU: 55555554 > Apr 29 12:10:54 myhost kernel: Call Trace: > Apr 29 12:10:54 myhost kernel: > Apr 29 12:10:54 myhost kernel: kvm_clear_dirty_log_protect+0x191/0x2d0 [= kvm] > Apr 29 12:10:54 myhost kernel: kvm_vm_ioctl+0x9f8/0x1ae0 [kvm] > Apr 29 12:10:54 myhost kernel: ? kvm_vm_ioctl+0x88c/0x1ae0 [kvm] > Apr 29 12:10:54 myhost kernel: __x64_sys_ioctl+0x97/0xe0 > Apr 29 12:10:54 myhost kernel: do_syscall_64+0x81/0x5e0 > Apr 29 12:10:54 myhost kernel: ? __pfx_pollwake+0x10/0x10 > Apr 29 12:10:54 myhost kernel: ? find_vmap_area+0xc0/0xe0 > Apr 29 12:10:54 myhost kernel: ? __check_object_size+0x1d3/0x240 > Apr 29 12:10:54 myhost kernel: ? kvm_get_dirty_log_protect+0x1e6/0x290 [= kvm] > Apr 29 12:10:54 myhost kernel: ? kvm_vm_ioctl+0x88c/0x1ae0 [kvm] > Apr 29 12:10:54 myhost kernel: ? __x64_sys_ioctl+0xb1/0xe0 > Apr 29 12:10:54 myhost kernel: ? do_syscall_64+0xbe/0x5e0 > Apr 29 12:10:54 myhost kernel: ? switch_fpu_return+0x5b/0xe0 > Apr 29 12:10:54 myhost kernel: ? do_syscall_64+0x245/0x5e0 > Apr 29 12:10:54 myhost kernel: ? ksys_write+0xcd/0xf0 > Apr 29 12:10:54 myhost kernel: ? do_syscall_64+0xbe/0x5e0 > Apr 29 12:10:54 myhost kernel: ? irqentry_exit+0x6e/0x570 > Apr 29 12:10:54 myhost kernel: ? __irq_exit_rcu+0x3d/0xe0 > Apr 29 12:10:54 myhost kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e > Apr 29 12:10:54 myhost kernel: RIP: 0033:0x7f2c02368d3b > Apr 29 12:10:54 myhost kernel: Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 = 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 = 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 2= 8 00 00 > Apr 29 12:10:54 myhost kernel: RSP: 002b:00007fff14e31360 EFLAGS: 0000024= 6 ORIG_RAX: 0000000000000010 > Apr 29 12:10:54 myhost kernel: RAX: ffffffffffffffda RBX: 00000000c018aec= 0 RCX: 00007f2c02368d3b > Apr 29 12:10:54 myhost kernel: RDX: 00007fff14e314d0 RSI: ffffffffc018aec= 0 RDI: 0000000000000015 > Apr 29 12:10:54 myhost kernel: RBP: 000055e177b41000 R08: 000000000000004= 0 R09: 0000000000000000 > Apr 29 12:10:54 myhost kernel: R10: 0000000000000000 R11: 000000000000024= 6 R12: 00007fff14e314d0 > Apr 29 12:10:54 myhost kernel: R13: 0000000000000000 R14: 000000000000000= 8 R15: 000055e177b410b0 > Apr 29 12:10:54 myhost kernel: =46rom the log we see that the looking-glass application. AFAICS you do not use the related dkms module? (that would taint the kernel). Is this a recent regression? And if yes since you can reporoduce it, can you bisect the changes between the last working kernel and 6.19.13?=20 Test please as well 7.0.3 in unstable (as 6.19.y is EOL) to check if the issue is resolved there or still present. Regards, Salvatore