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Bug#1130845: linux-image-6.18.12+deb13-amd64: kernel panic after plugging a 5 Bay USB Docking Station (DS-5R15) with BTRFS disks

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  Bug#1130845: linux-image-6.18.12+deb13-amd64: kernel panic after plugging a 5 Bay USB Docking Station (DS-5R15) with BTRFS disks Salvatore Bonaccorso <carnil@debian.org> - 2026-03-15 15:40 +0100

#91683 — Bug#1130845: linux-image-6.18.12+deb13-amd64: kernel panic after plugging a 5 Bay USB Docking Station (DS-5R15) with BTRFS disks

Control: tags -1 + moreinfo

Hi,

On Sun, Mar 15, 2026 at 01:19:02PM +0100, Christophe Combelles wrote:
> Package: src:linux
> Version: 6.18.12-1~bpo13+1
> Severity: critical
> Tags: upstream
> Justification: breaks the whole system
> X-Debbugs-Cc: debian-amd64@lists.debian.org
> User: debian-amd64@lists.debian.org
> Usertags: amd64
> 
> Dear Maintainer,
> 
> Got a kernel panic just after plugging a 5 Bay USB Docking Station
> (Sabrent DS-5R15) with 5 BTRFS raid1 disks. I heard and saw the kernel starting to read the disks (though I don't have automounting configured),
> then the large qrcode appeared, which is copied below.
> 
> 
> -- Package-specific info:
> ** Kernel log:
> 
> [531223.838390]  snd_hda_codec_generic snd_hda_codec_atihdmi kvm_amd btintel videobuf2_vmalloc snd_hda_codec_hdmi snd_soc_core mt76 uvc videobuf2_memops videobuf2_v4l2 snd_hda_intel snd_compress videodev snd_pcm_dmaengine kvm bluetooth snd_hda_codec snd_rpl_pci_acp6x videobuf2_common snd_hda_core snd_acp_pci mac80211 gpio_keys mc ecdh_generic irqbypass snd_amd_acpi_mach snd_ctl_led snd_intel_dspcfg ghash_clmulni_intel snd_acp_legacy_common snd_intel_sdw_acpi aesni_intel think_lmi snd_pci_acp6x snd_hwdep rapl snd_pcm cfg80211 thinkpad_acpi snd_pci_acp5x amd_pmf firmware_attributes_class amdtee nvram snd_rn_pci_acp3x snd_timer wmi_bmof sparse_keymap snd_acp_config spd5118 amdxdna pcspkr snd_soc_acpi snd rfkill ccp k10temp libarc4 drm_shmem_helper snd_pci_acp3x soundcore amd_sfh ac tee joydev amd_pmc platform_profile soc_button_array evdev msr parport_pc ppdev dm_mod lp parport efi_pstore configfs nfnetlink ip_tables x_tables autofs4 crc32c_cryptoapi btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy
> [531223.838449]  async_pq async_xor async_tx xor raid6_pq raid1 raid0 md_mod usbhid amdgpu amdxcp drm_panel_backlight_quirks gpu_sched drm_buddy drm_ttm_helper ttm ucsi_acpi drm_exec typec_ucsi i2c_algo_bit drm_suballoc_helper drm_display_helper typec hid_multitouch nvme cec hid_generic roles rc_core drm_client_lib xhci_pci i2c_hid_acpi nvme_core drm_kms_helper i2c_hid xhci_hcd hid sp5100_tco r8169 psmouse nvme_keyring watchdog thunderbolt usbcore drm nvme_auth i2c_piix4 serio_raw realtek video crc16 battery hkdf usb_common i2c_smbus button fan wmi efivarfs
> [531223.838490] CPU: 12 UID: 0 PID: 1 Comm: systemd Tainted: G      D             6.18.12+deb13-amd64 #1 PREEMPT(lazy)  Debian 6.18.12-1~bpo13+1 
> [531223.838495] Tainted: [D]=DIE
> [531223.838496] Hardware name: LENOVO 21RVCTO1WW/21RVCTO1WW, BIOS R2XET37W (1.17 ) 11/07/2025
> [531223.838498] RIP: 0010:__queue_work+0x48f/0x4d0
> [531223.838501] Code: e8 76 3d fd ff 0f 0b e9 4b fc ff ff 48 8b 73 18 48 8d 95 c0 00 00 00 48 c7 c7 18 e6 1d 9d c6 05 35 f2 f6 01 01 e8 51 3d fd ff <0f> 0b e9 c8 fe ff ff 4c 89 fe 48 c7 c7 80 d4 a6 9d e8 1b 3b 76 00
> [531223.838503] RSP: 0000:ffffd04e800bfd70 EFLAGS: 00010086
> [531223.838505] RAX: 0000000000000000 RBX: ffff8f21c811c808 RCX: 0000000000000027
> [531223.838507] RDX: ffff8f3565f1ce48 RSI: 0000000000000001 RDI: ffff8f3565f1ce40
> [531223.838508] RBP: ffff8f208774d800 R08: 0000000000000000 R09: 0000000000000000
> [531223.838509] R10: 65756575716b726f R11: 756575716b726f77 R12: 0000000000002000
> [531223.838511] R13: 0000000000000296 R14: 0000000000004000 R15: ffff8f21c811c838
> [531223.838512] FS:  00007f370c041540(0000) GS:ffff8f35c7876000(0000) knlGS:0000000000000000
> [531223.838514] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [531223.838515] CR2: 0000560a40e64130 CR3: 000000015282e000 CR4: 0000000000f50ef0
> [531223.838517] PKRU: 55555554
> [531223.838518] Call Trace:
> [531223.838521]  <TASK>
> [531223.838525]  queue_work_on+0x65/0x70
> [531223.838528]  blk_update_request+0x17a/0x410
> [531223.838532]  ? __x64_sys_recvfrom+0x24/0x30
> [531223.838536]  ? do_syscall_64+0xbc/0x800
> [531223.838540]  scsi_end_request+0x27/0x1a0 [scsi_mod]
> [531223.838554]  scsi_io_completion+0x53/0x630 [scsi_mod]
> [531223.838565]  blk_done_softirq+0x4d/0x60
> [531223.838568]  handle_softirqs+0xdf/0x320
> [531223.838572]  ? __flush_smp_call_function_queue+0xf0/0x400
> [531223.838575]  __irq_exit_rcu+0xbc/0xe0
> [531223.838577]  sysvec_call_function_single+0x3d/0x90
> [531223.838581]  asm_sysvec_call_function_single+0x1a/0x20
> [531223.838583] RIP: 0033:0x7f370be20a0b
> [531223.838627] Code: 12 d8 48 31 f0 48 c1 c6 20 66 0f 73 d9 08 66 48 0f 7e da 66 0f d4 c8 48 c1 c2 10 66 48 0f 7e c9 48 31 ca 48 01 d6 48 c1 c2 15 <48> 31 f2 48 89 37 48 89 57 18 48 8d 14 08 48 c1 c0 11 48 31 d0 48
> [531223.838629] RSP: 002b:00007ffe5d3bc818 EFLAGS: 00000a02
> [531223.838630] RAX: a53b0a1c7c07e2cd RBX: 00007ffe5d3bc840 RCX: 3b03d2408ea06e14
> [531223.838632] RDX: 8ca04d8849514d00 RSI: 112314df91773e8c RDI: 00007ffe5d3bc840
> [531223.838633] RBP: 0e00005245564952 R08: d40e6c20411e8844 R09: e9959a9a2aab32bf
> [531223.838634] R10: 9ca8d33c67d3bad5 R11: 0000000000000000 R12: 0000560a40ec0fd0
> [531223.838635] R13: 0000560a40f426e0 R14: 0000560a40ec0ff0 R15: 0000560a40ec0fd0
> [531223.838637]  </TASK>
> [531223.838639] ---[ end trace 0000000000000000 ]---
> [531224.033714] RIP: 0010:percpu_counter_add_batch+0x13/0xa0
> [531224.033730] Code: 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 fd 4c 63 c2 53 48 8b 7f 20 48 89 f3 <65> 48 63 37 48 8d 0c 1e 48 89 f0 49 89 f1 48 89 ca 48 f7 da 48 0f
> [531224.033732] RSP: 0018:ffffd04e80003e68 EFLAGS: 00010286
> [531224.033735] RAX: ffffffffc2106710 RBX: ffffffffffffffff RCX: ffff8f213913bd80
> [531224.033736] RDX: 0000000000000030 RSI: ffffffffffffffff RDI: 0000000000000000
> [531224.033737] RBP: ffff8f22b7b88c00 R08: 0000000000000030 R09: 0000000000000200
> [531224.033738] R10: 0000000000004650 R11: ffffffff9da080c0 R12: ffff8f26657afc00
> [531224.033739] R13: ffff8f2663494380 R14: 0000000000004000 R15: ffff8f24f969b238
> [531224.033740] FS:  0000000000000000(0000) GS:ffff8f35c7576000(0000) knlGS:0000000000000000
> [531224.033741] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [531224.033742] CR2: ffff8f35c7576000 CR3: 0000000673c2c000 CR4: 0000000000f50ef0
> [531224.033743] PKRU: 55555554
> [531224.033745] Kernel panic - not syncing: Fatal exception in interrupt
> [531224.033864] Kernel Offset: 0x1aa00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

AFAICS above, there should not have been the first message, as the
kernel was already tainted. 

So a couple of question: 

- Can you reproduce the issue, and can you get a complete log from the
  beginning of the log?
- Is that a regression for an earlier kernel, which is the last one
  which works?
- 6.18.12-1~bpo13+1 is not a current kernel, can you reproduce the
  issue with the most current kernel in backports? Ideally please as
  well test the current 6.19.8-1 in unstable and report back if the
  problem is triggerable there as well (if yes, the full log from this
  is valuable to potentially make an upstream report).

Rgards,
Salvatore

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