Public bug reported:
[ 13.055845] ------------[ cut here ]------------
[ 13.055848] Unpatched return thunk in use. This should not happen!
[ 13.055850] WARNING: arch/x86/kernel/cpu/bugs.c:3736 at
__warn_thunk+0x10/0x20, CPU#4: (udev-worker)/607
[ 13.055861] Modules linked in: soundwire_generic_allocation
snd_soc_sdw_utils snd_soc_acpi nvidia(PO+) intel_uncore_frequency soundwire_bus
intel_uncore_frequency_common intel_tcc_cooling snd_soc_sdca
x86_pkg_temp_thermal crc8 intel_powerclamp snd_soc_avs snd_soc_hda_codec
snd_hda_ext_core snd_hda_codec uvcvideo videobuf2_vmalloc snd_hda_core coretemp
uvc snd_intel_dspcfg videobuf2_memops snd_intel_sdw_acpi videobuf2_v4l2
snd_hwdep btusb kvm_intel videobuf2_common btmtk snd_soc_core btrtl btbcm
videodev snd_compress btintel mc kvm cmdlinepart ac97_bus bluetooth irqbypass
iwlmvm spi_nor snd_pcm_dmaengine rapl mei_hdcp mei_pxp intel_rapl_msr mtd
asus_nb_wmi processor_thermal_device_pci_legacy intel_cstate snd_pcm
nls_iso8859_1 asus_armoury snd_seq_midi mac80211 i915(+) snd_seq_midi_event
processor_thermal_device mfd_aaeon snd_rawmidi firmware_attributes_class
processor_thermal_wt_hint libarc4 asus_wmi platform_temperature_control snd_seq
wmi_bmof sparse_keymap processor_thermal_soc_slider mxm_wmi snd_seq_device
[ 13.055925] processor_thermal_rfim drm_buddy i2c_i801
processor_thermal_rapl snd_timer intel_rapl_common iwlwifi i2c_smbus
drm_display_helper processor_thermal_wt_req processor_thermal_power_floor snd
i2c_mux drm_ttm_helper spi_intel_pci cec processor_thermal_mbox mei_me
spi_intel soundcore ttm intel_soc_dts_iosf cfg80211 rc_core i2c_algo_bit mei
platform_profile igen6_edac int3403_thermal int340x_thermal_zone intel_pmc_core
pmt_telemetry pmt_discovery pmt_class intel_pmc_ssram_telemetry int3400_thermal
intel_vsec acpi_tad acpi_thermal_rel acpi_pad input_leds joydev mac_hid
nft_masq nft_chain_nat nf_nat nft_ct nf_conntrack sch_fq_codel nf_defrag_ipv6
nf_defrag_ipv4 ovpn lp ppdev nf_tables ip6_udp_tunnel parport_pc udp_tunnel
parport cpuid msr nvme_fabrics efi_pstore nfnetlink dmi_sysfs autofs4 btrfs
libblake2b xor raid6_pq dm_crypt usbhid nvme ucsi_acpi nvme_core typec_ucsi
nvme_keyring typec hid_multitouch nvme_auth hid_generic hkdf rtsx_pci_sdmmc
ghash_clmulni_intel serio_raw i2c_hid_acpi video rtsx_pci i2c_hid hid
[ 13.055998] intel_lpss_pci intel_lpss wmi thunderbolt pinctrl_tigerlake
idma64 vmd aesni_intel
[ 13.056008] CPU: 4 UID: 0 PID: 607 Comm: (udev-worker) Tainted: P
O 7.0.0-12-generic #12-Ubuntu PREEMPT(lazy)
[ 13.056012] Tainted: [P]=PROPRIETARY_MODULE, [O]=OOT_MODULE
[ 13.056014] Hardware name: ASUSTeK COMPUTER INC. ZenBook
UX435EG_UX435EG/UX435EG, BIOS UX435EG.315 04/22/2022
[ 13.056016] RIP: 0010:__warn_thunk+0x10/0x20
[ 13.056020] Code: 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 48 8d 3d 50 3f b1 02 <67> 48 0f
b9 3a 5d 31 ff e9 c3 8c 36 01 0f 1f 00 90 90 90 90 90 90
[ 13.056022] RSP: 0018:ffffcc30c59b3b48 EFLAGS: 00010246
[ 13.056025] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 13.056027] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffbe6d7c60
[ 13.056029] RBP: ffffcc30c59b3b48 R08: 0000000000000000 R09: 0000000000000000
[ 13.056030] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8a814a95ac40
[ 13.056032] R13: ffffffffc336bf00 R14: ffffffffc0ff8010 R15: 000055df00b47960
[ 13.056034] FS: 000070236af56c80(0000) GS:ffff8a8508a00000(0000)
knlGS:0000000000000000
[ 13.056036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 13.056038] CR2: 000070236ab36f00 CR3: 0000000154fea001 CR4: 0000000000f70ef0
[ 13.056040] PKRU: 55555554
[ 13.056042] Call Trace:
[ 13.056044] <TASK>
[ 13.056047] warn_thunk_thunk+0x16/0x30
[ 13.056053] nvidia_init_module+0x29/0x6a0 [nvidia]
[ 13.056393] ? ____versions+0x33cedb09c1a0/0x33cedb09c1a0 [nvidia]
[ 13.056688] do_one_initcall+0x59/0x350
[ 13.056695] do_init_module+0x8b/0x290
[ 13.056700] load_module+0x855/0x960
[ 13.056705] init_module_from_file+0xfb/0x180
[ 13.056710] idempotent_init_module+0x10e/0x300
[ 13.056715] __x64_sys_finit_module+0x73/0xf0
[ 13.056719] x64_sys_call+0xe2e/0x2390
[ 13.056722] do_syscall_64+0x115/0x5a0
[ 13.056727] ? clear_bhb_loop+0x50/0xa0
[ 13.056731] ? clear_bhb_loop+0x50/0xa0
[ 13.056734] ? clear_bhb_loop+0x50/0xa0
[ 13.056743] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 13.056746] RIP: 0033:0x70236a73cbad
[ 13.056749] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d 23 a2 0d 00 f7 d8 64 89 01 48
[ 13.056752] RSP: 002b:00007ffcdad4ba78 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 13.056755] RAX: ffffffffffffffda RBX: 000055df00b3ae70 RCX: 000070236a73cbad
[ 13.056757] RDX: 0000000000000004 RSI: 000055df00b47960 RDI: 000000000000002d
[ 13.056758] RBP: 00007ffcdad4bb10 R08: 0000000000000000 R09: 000055df00b45310
[ 13.056760] R10: 0000000000000000 R11: 0000000000000246 R12: 000055df00b47960
[ 13.056761] R13: 000055df0089c880 R14: 0000000000020000 R15: 0000000000000000
[ 13.056765] </TASK>
[ 13.056767] ---[ end trace 0000000000000000 ]---
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-12-generic 7.0.0-12.12
ProcVersionSignature: Ubuntu 7.0.0-12.12-generic 7.0.0-rc6
Uname: Linux 7.0.0-12-generic x86_64
NonfreeKernelModules: zfs nvidia_modeset nvidia
ApportVersion: 2.33.1-0ubuntu7
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 8 11:15:24 2026
InstallationDate: Installed on 2025-05-18 (324 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
MachineType: ASUSTeK COMPUTER INC. ZenBook UX435EG_UX435EG
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-12-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
plymouth.ignore-serial-consoles mem_sleep_default=deep
resume=/dev/mapper/ubuntu--vg-ubuntu--lv resume_offset=15783936
nvidia-drm.modeset=1 transparent_hugepage=always skew_tick=1
numa_balancing=disable workqueue.power_efficient=0 pci=realloc
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-03-12 (27 days ago)
dmi.bios.date: 04/22/2022
dmi.bios.release: 5.19
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: UX435EG.315
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX435EG
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvrUX435EG.315:bd04/22/2022:br5.19:svnASUSTeKCOMPUTERINC.:pnZenBookUX435EG_UX435EG:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX435EG:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku:pfaZenBook:
dmi.product.family: ZenBook
dmi.product.name: ZenBook UX435EG_UX435EG
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2147523
Title:
Crash in CPU
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