Hello! After upgrading my kernel to Debian's latest version (6.1.85), I started encountering systematic kernel BUGs at boot, making the bluetooth stack unusable. I initially reported this to Debian's bug tracker: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069301 .. but have since confirmed that this is reproducible with vanilla kernels, including the latest 6.1.y version (6.1.87). I tried various kernel versions (straight from kernel.org) to pinpoint when the problem started occurring and the resultats are: - linux 6.1.80 => OK - linux 6.1.82 => OK - linux 6.1.83 => BUG - linux 6.1.85 => BUG - linux 6.1.87 => BUG I have included a trace below, and full system details are available in the Debian bug listed above. Can you suggest any other tests I can perform to help diagnose the origin of the problem? [ 22.660847] list_del corruption, ffff94d9f6302000->prev is LIST_POISON2 (dead000000000122) [ 22.660887] ------------[ cut here ]------------ [ 22.660890] kernel BUG at lib/list_debug.c:56! [ 22.660907] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 22.660917] CPU: 10 PID: 139 Comm: kworker/u25:0 Not tainted 6.1.0-20-amd64 #1 Debian 6.1.85-1 [ 22.660929] Hardware name: Dell Inc. XPS 9315/00KRKP, BIOS 1.19.1 03/14/2024 [ 22.660936] Workqueue: hci0 hci_cmd_sync_work [bluetooth] [ 22.661128] RIP: 0010:__list_del_entry_valid.cold+0x4b/0x6f [ 22.661147] Code: fe ff 0f 0b 48 89 f2 48 89 fe 48 c7 c7 48 18 7a 9f e8 14 a1 fe ff 0f 0b 48 89 fe 48 89 ca 48 c7 c7 10 18 7a 9f e8 00 a1 fe ff <0f> 0b 48 89 fe 48 c7 c7 d8 17 7a 9f e8 ef a0 fe ff 0f 0b 48 89 fe [ 22.661156] RSP: 0000:ffffae0e406efde0 EFLAGS: 00010246 [ 22.661164] RAX: 000000000000004e RBX: ffff94d9f6302000 RCX: 0000000000000027 [ 22.661172] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff94dfaf8a03a0 [ 22.661177] RBP: ffff94d859392000 R08: 0000000000000000 R09: ffffae0e406efc78 [ 22.661182] R10: 0000000000000003 R11: ffffffff9fed4448 R12: ffff94d859392000 [ 22.661187] R13: ffff94d859392770 R14: ffff94d858cb9800 R15: dead000000000100 [ 22.661194] FS: 0000000000000000(0000) GS:ffff94dfaf880000(0000) knlGS:0000000000000000 [ 22.661202] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.661208] CR2: 00007f423c024038 CR3: 0000000799c04000 CR4: 0000000000750ee0 [ 22.661214] PKRU: 55555554 [ 22.661218] Call Trace: [ 22.661225] <TASK> [ 22.661232] ? __die_body.cold+0x1a/0x1f [ 22.661246] ? die+0x2a/0x50 [ 22.661257] ? do_trap+0xc5/0x110 [ 22.661268] ? __list_del_entry_valid.cold+0x4b/0x6f [ 22.661279] ? do_error_trap+0x6a/0x90 [ 22.661289] ? __list_del_entry_valid.cold+0x4b/0x6f [ 22.661298] ? exc_invalid_op+0x4c/0x60 [ 22.661307] ? __list_del_entry_valid.cold+0x4b/0x6f [ 22.661316] ? asm_exc_invalid_op+0x16/0x20 [ 22.661328] ? __list_del_entry_valid.cold+0x4b/0x6f [ 22.661337] hci_conn_del+0x136/0x3e0 [bluetooth] [ 22.661466] hci_abort_conn_sync+0xaa/0x230 [bluetooth] [ 22.661632] ? abort_conn_sync+0x3d/0x70 [bluetooth] [ 22.661751] hci_cmd_sync_work+0x9f/0x150 [bluetooth] [ 22.661915] process_one_work+0x1c4/0x380 [ 22.661929] worker_thread+0x4d/0x380 [ 22.661940] ? rescuer_thread+0x3a0/0x3a0 [ 22.661950] kthread+0xd7/0x100 [ 22.661959] ? kthread_complete_and_exit+0x20/0x20 [ 22.661969] ret_from_fork+0x1f/0x30 [ 22.661984] </TASK> [ 22.661987] Modules linked in: ctr ccm nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink br_netfilter bridge stp llc xfrm_user xfrm_algo nvme_fabrics rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device cmac algif_hash algif_skcipher af_alg snd_ctl_led snd_soc_sof_sdw snd_soc_intel_hda_dsp_common snd_sof_probes snd_soc_intel_sof_maxim_common snd_soc_rt715_sdca snd_soc_rt1316_sdw regmap_sdw_mbq snd_hda_codec_hdmi regmap_sdw overlay ip6t_REJECT nf_reject_ipv6 xt_hl ip6_tables ip6t_rt ipt_REJECT nf_reject_ipv4 xt_LOG qrtr nf_log_syslog nft_limit bnep ipmi_devintf ipmi_msghandler xt_limit xt_addrtype xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables libcrc32c nfnetlink binfmt_misc nls_ascii nls_cp437 vfat fat x86_pkg_temp_thermal intel_powerclamp coretemp snd_soc_dmic snd_sof_pci_intel_tgl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils [ 22.662122] snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core kvm_intel snd_compress btusb soundwire_bus btrtl kvm btbcm snd_hda_intel btintel snd_intel_dspcfg btmtk dell_laptop snd_intel_sdw_acpi irqbypass ledtrig_audio bluetooth snd_hda_codec i915 snd_hda_core rapl mei_hdcp intel_rapl_msr snd_hwdep processor_thermal_device_pci dell_wmi joydev hid_sensor_als intel_cstate jitterentropy_rng processor_thermal_device snd_pcm hid_sensor_trigger processor_thermal_rfim dell_smbios ucsi_acpi dcdbas hid_sensor_iio_common processor_thermal_mbox drm_buddy intel_uncore iwlmvm pcspkr drbg iTCO_wdt typec_ucsi dell_wmi_sysman snd_timer industrialio_triggered_buffer drm_display_helper processor_thermal_rapl mei_me dell_wmi_descriptor firmware_attributes_class kfifo_buf wmi_bmof ansi_cprng intel_pmc_bxt cec snd roles intel_rapl_common ecdh_generic iTCO_vendor_support int3403_thermal watchdog ecc industrialio mei soundcore typec int3400_thermal rc_core mac80211 [ 22.662253] int340x_thermal_zone intel_pmc_core button intel_hid acpi_thermal_rel sparse_keymap ttm acpi_pad acpi_tad drm_kms_helper libarc4 igen6_edac i2c_algo_bit ac evdev hid_multitouch serio_raw iwlwifi cfg80211 rfkill msr parport_pc ppdev lp drm parport fuse loop efi_pstore configfs efivarfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic usbhid hid_sensor_custom hid_sensor_hub dm_crypt dm_mod intel_ishtp_hid nvme nvme_core t10_pi crc64_rocksoft_generic crc64_rocksoft crc_t10dif crct10dif_generic crc64 ahci libahci crct10dif_pclmul crct10dif_common libata crc32_pclmul crc32c_intel scsi_mod spi_pxa2xx_platform ghash_clmulni_intel dw_dmac hid_generic sha512_ssse3 scsi_common dw_dmac_core xhci_pci sha512_generic sha256_ssse3 xhci_hcd sha1_ssse3 usbcore i2c_hid_acpi intel_lpss_pci aesni_intel video intel_ish_ipc i2c_i801 i2c_hid intel_lpss psmouse thunderbolt crypto_simd cryptd i2c_smbus vmd intel_ishtp usb_common idma64 hid battery wmi [ 22.662422] ---[ end trace 0000000000000000 ]--- Cheers, Jeremy
