Kafs 6.16.0-rc3 BUG: kernel NULL pointer dereference

[markus.suvanto at gmail.com]

Dear all

Using kafs 6.16.0-rc3 I will get 
"BUG: kernel NULL pointer dereference, address"
I have no reproducer for this but I will hit this about 
once per day.

This time two separate computers and different
"Call Trace" than previous 
https://lists.infradead.org/pipermail/linux-afs/2025-June/009882.html

-Markus


1. computer


[25053.286921] hub 4-1.4:1.0: 3 ports detected
[25054.131014] usb 4-1.4.3: new SuperSpeed USB device number 4 using xhci_hcd
[25054.148022] hub 4-1.4.3:1.0: USB hub found
[25054.148092] hub 4-1.4.3:1.0: 4 ports detected
[25054.224202] usb 3-1.4.3: new high-speed USB device number 5 using xhci_hcd
[25054.321467] hub 3-1.4.3:1.0: USB hub found
[25054.321539] hub 3-1.4.3:1.0: 4 ports detected
[25054.387706] usb 4-1.4.1: new SuperSpeed USB device number 5 using xhci_hcd
[25054.480901] usb 3-1.4.4: new full-speed USB device number 6 using xhci_hcd
[25054.604443] input: HP Inc. HP Deora Monitor System Control as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.4/3-1.4.4:1.2/0003:03F0:0C93.0008/input/input48
[25054.644969] r8152-cfgselector 4-1.4.1: reset SuperSpeed USB device number 5 using xhci_hcd
[25054.658367] hid-generic 0003:03F0:0C93.0008: input,hiddev0,hidraw0: USB HID v1.11 Device [HP Inc. HP Deora Monitor]
on usb-0000:06:00.0-1.4.4/input2
[25054.722580] r8152 4-1.4.1:1.0 eth0: v1.12.13
[25054.737364] usb 3-1.4.3.2: new full-speed USB device number 7 using xhci_hcd
[25054.853670] input: Corsair CORSAIR K70 RGB MK.2 Mechanical Gaming Keyboard as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.2/3-1.4.3.2:1.0/0003:1B1C:1B49.0009/input/input49
[25054.856719] r8152 4-1.4.1:1.0 enp6s0u1u4u1: renamed from eth0
[25054.967499] input: Corsair CORSAIR K70 RGB MK.2 Mechanical Gaming Keyboard as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.2/3-1.4.3.2:1.0/0003:1B1C:1B49.0009/input/input50
[25054.967714] input: Corsair CORSAIR K70 RGB MK.2 Mechanical Gaming Keyboard as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.2/3-1.4.3.2:1.0/0003:1B1C:1B49.0009/input/input51
[25054.967907] input: Corsair CORSAIR K70 RGB MK.2 Mechanical Gaming Keyboard Mouse as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.2/3-1.4.3.2:1.0/0003:1B1C:1B49.0009/input/input52
[25054.968387] hid-generic 0003:1B1C:1B49.0009: input,hiddev1,hidraw1: USB HID v1.11 Keyboard [Corsair CORSAIR K70 RGB
MK.2 Mechanical Gaming Keyboard] on usb-0000:06:00.0-1.4.3.2/input0
[25054.969610] hid-generic 0003:1B1C:1B49.000A: hiddev2,hidraw2: USB HID v1.11 Device [Corsair CORSAIR K70 RGB MK.2
Mechanical Gaming Keyboard] on usb-0000:06:00.0-1.4.3.2/input1
[25055.047512] usb 3-1.4.3.3: new full-speed USB device number 8 using xhci_hcd
[25055.172150] logitech-djreceiver 0003:046D:C52B.000D: hiddev3,hidraw3: USB HID v1.11 Device [Logitech USB Receiver] on
usb-0000:06:00.0-1.4.3.3/input2
[25055.287070] input: Logitech K750 as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.3/3-1.4.3.3:1.2/0003:046D:C52B.000D/0003:046D:4002.000E/input/input53
[25055.397553] logitech-hidpp-device 0003:046D:4002.000E: input,hidraw4: USB HID v1.11 Keyboard [Logitech K750] on usb-
0000:06:00.0-1.4.3.3/input2:1
[25055.406863] input: Logitech Anywhere MX as
/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/0000:02:01.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/usb3/3-1/3-1.4/3-
1.4.3/3-1.4.3.3/3-1.4.3.3:1.2/0003:046D:C52B.000D/0003:046D:1017.000F/input/input54
[25055.407704] logitech-hidpp-device 0003:046D:1017.000F: input,hidraw5: USB HID v1.11 Mouse [Logitech Anywhere MX] on
usb-0000:06:00.0-1.4.3.3/input2:2
[25058.198142] PM: suspend exit
[25058.347330] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[25058.347748] br0: port 1(enp0s31f6) entered disabled state
[25059.093409] r8152 4-1.4.1:1.0 enp6s0u1u4u1: carrier on
[25059.107355] br0: port 2(enp6s0u1u4u1) entered blocking state
[25059.107361] br0: port 2(enp6s0u1u4u1) entered disabled state
[25059.107380] r8152 4-1.4.1:1.0 enp6s0u1u4u1: entered allmulticast mode
[25059.107446] r8152 4-1.4.1:1.0 enp6s0u1u4u1: entered promiscuous mode
[25059.107527] r8152 4-1.4.1:1.0 enp6s0u1u4u1: Promiscuous mode enabled
[25059.107538] br0: port 2(enp6s0u1u4u1) entered blocking state
[25059.107541] br0: port 2(enp6s0u1u4u1) entered listening state
[25072.402051] logitech-hidpp-device 0003:046D:1017.000F: HID++ 1.0 device connected.
[25075.596965] br0: port 2(enp6s0u1u4u1) entered learning state
[25083.129514] kvm_intel: L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and
https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
[25090.953206] br0: port 2(enp6s0u1u4u1) entered forwarding state
[25090.953213] br0: topology change detected, propagating
[25179.150281] Callback UUID does not match fileserver UUID
[26877.095870] hrtimer: interrupt took 29084 ns
[35018.994265] BUG: kernel NULL pointer dereference, address: 0000000000000010
[35018.994287] #PF: supervisor read access in kernel mode
[35018.994300] #PF: error_code(0x0000) - not-present page
[35018.994312] PGD 0 P4D 0 
[35018.994329] Oops: Oops: 0000 [#1] SMP PTI
[35018.994349] CPU: 2 UID: 0 PID: 56475 Comm: kworker/u16:6 Not tainted 6.16.0-rc3 #1 VOLUNTARY 
[35018.994366] Hardware name: LENOVO 20HF0047MX/20HF0047MX, BIOS N1WET68W (1.47 ) 07/21/2022
[35018.994373] Workqueue: kafsd afs_process_async_call [kafs]
[35018.994456] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x190 [kafs]
[35018.994509] Code: 4a 3c 01 0f 84 ab 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 47 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 09 01 00 00 48 c7 c7 d0 de 95 c1 e8 4f
[35018.994519] RSP: 0018:ffffb13a094cfe08 EFLAGS: 00010246
[35018.994530] RAX: 0000000000000000 RBX: ffff8b065a065200 RCX: 0000000000000010
[35018.994539] RDX: ffff8b094950ff70 RSI: ffff8b09e2c5dc40 RDI: ffff8b094950ff70
[35018.994546] RBP: ffff8b065a065220 R08: 0000000000000001 R09: be17000085030000
[35018.994553] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b065a065200
[35018.994560] R13: ffff8b0640070000 R14: ffff8b0641f23845 R15: ffff8b06a2897840
[35018.994567] FS:  0000000000000000(0000) GS:ffff8b0bd60ee000(0000) knlGS:0000000000000000
[35018.994576] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[35018.994584] CR2: 0000000000000010 CR3: 000000036e018005 CR4: 00000000003726f0
[35018.994592] Call Trace:
[35018.994600]  <TASK>
[35018.994609]  afs_deliver_to_call+0x51/0x480 [kafs]
[35018.994679]  afs_process_async_call+0x6e/0x90 [kafs]
[35018.994737]  process_one_work+0x138/0x220
[35018.994760]  worker_thread+0x2ca/0x400
[35018.994775]  ? __pfx_worker_thread+0x10/0x10
[35018.994790]  kthread+0xce/0x1b0
[35018.994801]  ? __pfx_kthread+0x10/0x10
[35018.994810]  ? __pfx_kthread+0x10/0x10
[35018.994820]  ret_from_fork+0x6f/0xd0
[35018.994834]  ? __pfx_kthread+0x10/0x10
[35018.994844]  ret_from_fork_asm+0x1a/0x30
[35018.994861]  </TASK>
[35018.994866] Modules linked in: snd_usb_audio snd_ump snd_usbmidi_lib snd_hwdep snd_rawmidi uinput ccm wireguard
curve25519_x86_64 libchacha20poly1305 libcurve25519_generic libpoly1305 poly1305_x86_64 chacha_x86_64 libchacha
snd_seq_dummy snd_hrtimer rfcomm snd_seq snd_seq_device rmi_smbus rmi_core af_packet bridge stp llc uhid kvmgt cmac mdev
vfio_iommu_type1 algif_hash algif_skcipher vfio af_alg iommufd bnep sha3_generic jitterentropy_rng cachefiles drbg
ansi_cprng tpm_crb intel_rapl_msr snd_hda_codec_hdmi coretemp intel_rapl_common intel_uncore_frequency
intel_uncore_frequency_common intel_pmc_core_pltdrv intel_pmc_core pmt_telemetry pmt_class kafs
intel_pmc_ssram_telemetry uvcvideo intel_vsec intel_tcc_cooling videobuf2_vmalloc mei_pxp mei_hdcp x86_pkg_temp_thermal
snd_hda_codec_realtek ee1004 snd_soc_avs snd_soc_hda_codec snd_hda_ext_core iwlmvm snd_hda_codec_generic uvc
intel_powerclamp snd_hda_scodec_component snd_soc_core snd_ctl_led snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel
snd_intel_dspcfg
[35018.995110]  mac80211 fcrypt pcbc kvm_intel videobuf2_memops libarc4 rxrpc snd_hda_codec btusb tpm_tis thinkpad_acpi
btrtl kvm videobuf2_v4l2 snd_hda_core iwlwifi tpm_tis_core irqbypass btintel btbcm btmtk rapl snd_pcm nvram
ip6_udp_tunnel intel_cstate i2c_i801 e1000e nls_iso8859_1 tpm videodev cfg80211 krb5 bluetooth snd_timer
platform_profile intel_uncore sparse_keymap think_lmi libaescfb udp_tunnel i2c_mux nls_cp437 snd ecdh_generic wmi_bmof
rfkill cdc_ether firmware_attributes_class ptp videobuf2_common dns_resolver vfat i2c_smbus rng_core mei_me pps_core
efi_pstore intel_wmi_thunderbolt usbnet joydev tiny_power_button fat netfs r8152 mii mc crc16 mei intel_pch_thermal
thermal intel_xhci_usb_role_switch soundcore acpi_pad rtc_cmos ecc button ac battery input_leds mousedev bfq evdev
sch_fq_codel loop fuse dm_mod configfs nfnetlink crc32c_cryptoapi sd_mod hid_logitech_hidpp hid_logitech_dj hid_generic
usbkbd usbmouse usbhid uas usb_storage scsi_mod scsi_common i915 cfbimgblt cfbfillrect cfbcopyarea drm_client_lib
[35018.995425]  i2c_algo_bit fb_io_fops cec drm_buddy iosf_mbi ttm intel_gtt agpgart psmouse drm_display_helper
serio_raw drm_kms_helper atkbd libps2 vivaldi_fmap ucsi_acpi typec_ucsi nvme roles drm typec polyval_clmulni
ghash_clmulni_intel sha512_ssse3 xhci_pci nvme_core aesni_intel xhci_hcd drm_panel_orientation_quirks gf128mul
thunderbolt fb libaes hwmon usbcore font lcd ledtrig_backlight i2c_core usb_common video i8042 wmi serio backlight btrfs
blake2b_generic xor raid6_pq zstd_compress msr efivarfs dmi_sysfs sha1_generic sha1_ssse3 ipv6 autofs4
[35018.995633] CR2: 0000000000000010
[35018.995642] ---[ end trace 0000000000000000 ]---
[35019.036971] pstore: backend (efi_pstore) writing error (-28)
[35019.036975] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x190 [kafs]
[35019.036994] Code: 4a 3c 01 0f 84 ab 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 47 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 09 01 00 00 48 c7 c7 d0 de 95 c1 e8 4f
[35019.036997] RSP: 0018:ffffb13a094cfe08 EFLAGS: 00010246
[35019.037001] RAX: 0000000000000000 RBX: ffff8b065a065200 RCX: 0000000000000010
[35019.037003] RDX: ffff8b094950ff70 RSI: ffff8b09e2c5dc40 RDI: ffff8b094950ff70
[35019.037005] RBP: ffff8b065a065220 R08: 0000000000000001 R09: be17000085030000
[35019.037008] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b065a065200
[35019.037009] R13: ffff8b0640070000 R14: ffff8b0641f23845 R15: ffff8b06a2897840
[35019.037012] FS:  0000000000000000(0000) GS:ffff8b0bd60ee000(0000) knlGS:0000000000000000
[35019.037014] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[35019.037017] CR2: 0000000000000010 CR3: 000000036e018005 CR4: 00000000003726f0
[35019.037019] note: kworker/u16:6[56475] exited with irqs disabled
[39407.083391] input: JLab GO Air Sport (AVRCP) as /devices/virtual/input/input55
[39432.449521] usb 1-7: USB disconnect, device number 3
[39432.449618] Bluetooth: hci0: sending frame failed (-19)
[39432.449809] Bluetooth: hci0: Opcode 0x0c1a failed: -19
[39432.449824] Bluetooth: hci0: Error when powering off device on rfkill (-19)
[39432.449863] Bluetooth: hci0: sending frame failed (-19)
[39432.449890] Bluetooth: hci0: HCI reset during shutdown failed
[39435.738967] usb 1-7: new full-speed USB device number 15 using xhci_hcd
[39435.882432] Bluetooth: hci0: Bootloader revision 0.0 build 26 week 38 2015
[39435.883898] Bluetooth: hci0: Device revision is 16
[39435.883910] Bluetooth: hci0: Secure boot is enabled
[39435.883916] Bluetooth: hci0: OTP lock is enabled
[39435.883920] Bluetooth: hci0: API lock is enabled
[39435.883925] Bluetooth: hci0: Debug lock is disabled
[39435.883930] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[39435.931714] Bluetooth: hci0: Found device firmware: intel/ibt-12-16.sfi
[39437.585585] Bluetooth: hci0: Waiting for firmware download to complete
[39437.585876] Bluetooth: hci0: Firmware loaded in 1615412 usecs
[39437.586056] Bluetooth: hci0: Waiting for device to boot
[39437.598833] Bluetooth: hci0: Device booted in 12591 usecs
[39437.598986] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-12-16.ddc
[39437.601907] Bluetooth: hci0: Applying Intel DDC parameters completed
[39437.602932] Bluetooth: hci0: Firmware revision 0.1 build 19 week 44 2021
[39437.604925] Bluetooth: hci0: Reading supported features failed (-16)
[39437.604939] Bluetooth: hci0: Error reading debug features
[39437.604950] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported.
[39437.656308] Bluetooth: MGMT ver 1.23
[39442.736001] input: JLab GO Air Sport (AVRCP) as /devices/virtual/input/input56
[43544.496427] input: JLab GO Air Sport (AVRCP) as /devices/virtual/input/input57
[44023.310279] input: JLab GO Air Sport (AVRCP) as /devices/virtual/input/input58
[46603.563039] Callback UUID does not match fileserver UUID
[47678.658778] Bluetooth: hci0: corrupted SCO packet
[47678.658783] Bluetooth: hci0: corrupted SCO packet
[47678.658784] Bluetooth: hci0: corrupted SCO packet
[47678.658785] Bluetooth: hci0: corrupted SCO packet
[47678.658787] Bluetooth: hci0: corrupted SCO packet
[47678.658788] Bluetooth: hci0: corrupted SCO packet
[47678.658789] Bluetooth: hci0: corrupted SCO packet
[47678.658790] Bluetooth: hci0: corrupted SCO packet
[47678.658815] Bluetooth: hci0: corrupted SCO packet
[47678.658817] Bluetooth: hci0: corrupted SCO packet
[47678.668796] Bluetooth: hci0: corrupted SCO packet
[47678.668803] Bluetooth: hci0: corrupted SCO packet
[47678.668804] Bluetooth: hci0: corrupted SCO packet
[47678.668805] Bluetooth: hci0: corrupted SCO packet
[47678.668805] Bluetooth: hci0: corrupted SCO packet
[47683.648612] Bluetooth: hci0: SCO packet for unknown connection handle 257
[47683.648618] Bluetooth: hci0: SCO packet for unknown connection handle 257
[47683.648629] Bluetooth: hci0: SCO packet for unknown connection handle 257
[56446.657029] BUG: kernel NULL pointer dereference, address: 0000000000000010
[56446.657050] #PF: supervisor read access in kernel mode
[56446.657058] #PF: error_code(0x0000) - not-present page
[56446.657067] PGD 0 P4D 0 
[56446.657080] Oops: Oops: 0000 [#2] SMP PTI
[56446.657094] CPU: 1 UID: 0 PID: 97540 Comm: kworker/u16:4 Tainted: G      D             6.16.0-rc3 #1 VOLUNTARY 
[56446.657113] Tainted: [D]=DIE
[56446.657118] Hardware name: LENOVO 20HF0047MX/20HF0047MX, BIOS N1WET68W (1.47 ) 07/21/2022
[56446.657126] Workqueue: kafsd afs_process_async_call [kafs]
[56446.657226] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x190 [kafs]
[56446.657307] Code: 4a 3c 01 0f 84 ab 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 47 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 09 01 00 00 48 c7 c7 d0 de 95 c1 e8 4f
[56446.657321] RSP: 0018:ffffb13a0f1b7e08 EFLAGS: 00010246
[56446.657335] RAX: 0000000000000000 RBX: ffff8b0658541200 RCX: 0000000000000010
[56446.657346] RDX: ffff8b070f829f70 RSI: ffff8b09ac122780 RDI: ffff8b070f829f70
[56446.657356] RBP: ffff8b0658541220 R08: 0000000000000001 R09: 77000000aaffffff
[56446.657366] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b0658541200
[56446.657376] R13: ffff8b0640070000 R14: ffff8b0641f23855 R15: ffff8b09722a63c0
[56446.657386] FS:  0000000000000000(0000) GS:ffff8b0bd606e000(0000) knlGS:0000000000000000
[56446.657400] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[56446.657411] CR2: 0000000000000010 CR3: 000000036e018006 CR4: 00000000003726f0
[56446.657421] Call Trace:
[56446.657433]  <TASK>
[56446.657445]  afs_deliver_to_call+0x51/0x480 [kafs]
[56446.657551]  afs_process_async_call+0x6e/0x90 [kafs]
[56446.657645]  process_one_work+0x138/0x220
[56446.657671]  worker_thread+0x2ca/0x400
[56446.657690]  ? __pfx_worker_thread+0x10/0x10
[56446.657709]  kthread+0xce/0x1b0
[56446.657724]  ? __pfx_kthread+0x10/0x10
[56446.657739]  ? __pfx_kthread+0x10/0x10
[56446.657749]  ret_from_fork+0x6f/0xd0
[56446.657764]  ? __pfx_kthread+0x10/0x10
[56446.657773]  ret_from_fork_asm+0x1a/0x30
[56446.657789]  </TASK>
[56446.657795] Modules linked in: snd_usb_audio snd_ump snd_usbmidi_lib snd_hwdep snd_rawmidi uinput ccm wireguard
curve25519_x86_64 libchacha20poly1305 libcurve25519_generic libpoly1305 poly1305_x86_64 chacha_x86_64 libchacha
snd_seq_dummy snd_hrtimer rfcomm snd_seq snd_seq_device rmi_smbus rmi_core af_packet bridge stp llc uhid kvmgt cmac mdev
vfio_iommu_type1 algif_hash algif_skcipher vfio af_alg iommufd bnep sha3_generic jitterentropy_rng cachefiles drbg
ansi_cprng tpm_crb intel_rapl_msr snd_hda_codec_hdmi coretemp intel_rapl_common intel_uncore_frequency
intel_uncore_frequency_common intel_pmc_core_pltdrv intel_pmc_core pmt_telemetry pmt_class kafs
intel_pmc_ssram_telemetry uvcvideo intel_vsec intel_tcc_cooling videobuf2_vmalloc mei_pxp mei_hdcp x86_pkg_temp_thermal
snd_hda_codec_realtek ee1004 snd_soc_avs snd_soc_hda_codec snd_hda_ext_core iwlmvm snd_hda_codec_generic uvc
intel_powerclamp snd_hda_scodec_component snd_soc_core snd_ctl_led snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel
snd_intel_dspcfg
[56446.658063]  mac80211 fcrypt pcbc kvm_intel videobuf2_memops libarc4 rxrpc snd_hda_codec btusb tpm_tis thinkpad_acpi
btrtl kvm videobuf2_v4l2 snd_hda_core iwlwifi tpm_tis_core irqbypass btintel btbcm btmtk rapl snd_pcm nvram
ip6_udp_tunnel intel_cstate i2c_i801 e1000e nls_iso8859_1 tpm videodev cfg80211 krb5 bluetooth snd_timer
platform_profile intel_uncore sparse_keymap think_lmi libaescfb udp_tunnel i2c_mux nls_cp437 snd ecdh_generic wmi_bmof
rfkill cdc_ether firmware_attributes_class ptp videobuf2_common dns_resolver vfat i2c_smbus rng_core mei_me pps_core
efi_pstore intel_wmi_thunderbolt usbnet joydev tiny_power_button fat netfs r8152 mii mc crc16 mei intel_pch_thermal
thermal intel_xhci_usb_role_switch soundcore acpi_pad rtc_cmos ecc button ac battery input_leds mousedev bfq evdev
sch_fq_codel loop fuse dm_mod configfs nfnetlink crc32c_cryptoapi sd_mod hid_logitech_hidpp hid_logitech_dj hid_generic
usbkbd usbmouse usbhid uas usb_storage scsi_mod scsi_common i915 cfbimgblt cfbfillrect cfbcopyarea drm_client_lib
[56446.658497]  i2c_algo_bit fb_io_fops cec drm_buddy iosf_mbi ttm intel_gtt agpgart psmouse drm_display_helper
serio_raw drm_kms_helper atkbd libps2 vivaldi_fmap ucsi_acpi typec_ucsi nvme roles drm typec polyval_clmulni
ghash_clmulni_intel sha512_ssse3 xhci_pci nvme_core aesni_intel xhci_hcd drm_panel_orientation_quirks gf128mul
thunderbolt fb libaes hwmon usbcore font lcd ledtrig_backlight i2c_core usb_common video i8042 wmi serio backlight btrfs
blake2b_generic xor raid6_pq zstd_compress msr efivarfs dmi_sysfs sha1_generic sha1_ssse3 ipv6 autofs4
[56446.658754] CR2: 0000000000000010
[56446.658767] ---[ end trace 0000000000000000 ]---
[56446.698333] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x190 [kafs]
[56446.698353] Code: 4a 3c 01 0f 84 ab 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 47 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 09 01 00 00 48 c7 c7 d0 de 95 c1 e8 4f
[56446.698356] RSP: 0018:ffffb13a094cfe08 EFLAGS: 00010246
[56446.698360] RAX: 0000000000000000 RBX: ffff8b065a065200 RCX: 0000000000000010
[56446.698362] RDX: ffff8b094950ff70 RSI: ffff8b09e2c5dc40 RDI: ffff8b094950ff70
[56446.698364] RBP: ffff8b065a065220 R08: 0000000000000001 R09: be17000085030000
[56446.698366] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8b065a065200
[56446.698367] R13: ffff8b0640070000 R14: ffff8b0641f23845 R15: ffff8b06a2897840
[56446.698369] FS:  0000000000000000(0000) GS:ffff8b0bd606e000(0000) knlGS:0000000000000000
[56446.698372] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[56446.698374] CR2: 0000000000000010 CR3: 000000036e018006 CR4: 00000000003726f0
[56446.698376] note: kworker/u16:4[97540] exited with irqs disabled
[81115.777586] input: JLab GO Air Sport (AVRCP) as /devices/virtual/input/input59
[83105.171178] Callback UUID does not match fileserver UUID


2. computer

[361069.289081] DMAR: [DMA Read NO_PASID] Request device [05:00.0] fault addr 0xfa8b6000 [fault reason 0x06] PTE Read
access is not set
[361092.073290] AFS: Cache volume key already in use (afs,station.com,20000019)
[361152.090960] AFS: Cache volume key already in use (afs,station.com,20000019)
[361192.096041] AFS: Cache volume key already in use (afs,station.com,20000019)
[361392.111646] AFS: Cache volume key already in use (afs,station.com,20000019)
[361452.121690] AFS: Cache volume key already in use (afs,station.com,20000019)
[361492.125329] AFS: Cache volume key already in use (afs,station.com,20000019)
[361692.155200] AFS: Cache volume key already in use (afs,station.com,20000019)
[361752.174135] AFS: Cache volume key already in use (afs,station.com,20000019)
[361792.180492] AFS: Cache volume key already in use (afs,station.com,20000019)
[361888.520015] DMAR: DRHD: handling fault status reg 302
[361888.520642] DMAR: [DMA Read NO_PASID] Request device [05:00.0] fault addr 0xff6ae000 [fault reason 0x06] PTE Read
access is not set
[361992.207384] AFS: Cache volume key already in use (afs,station.com,20000019)
[362052.214999] AFS: Cache volume key already in use (afs,station.com,20000019)
[362092.225570] AFS: Cache volume key already in use (afs,station.com,20000019)
[362292.237995] AFS: Cache volume key already in use (afs,station.com,20000019)
[362352.249969] AFS: Cache volume key already in use (afs,station.com,20000019)
[362392.255369] AFS: Cache volume key already in use (afs,station.com,20000019)
[362592.275667] AFS: Cache volume key already in use (afs,station.com,20000019)
[362652.292659] AFS: Cache volume key already in use (afs,station.com,20000019)
[362692.301608] AFS: Cache volume key already in use (afs,station.com,20000019)
[362791.748738] DMAR: DRHD: handling fault status reg 402
[362791.749430] DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0xfd24c000 [fault reason 0x06] PTE Read
access is not set
[362892.330244] AFS: Cache volume key already in use (afs,station.com,20000019)
[362952.344971] AFS: Cache volume key already in use (afs,station.com,20000019)
[362992.352494] AFS: Cache volume key already in use (afs,station.com,20000019)
[363192.371333] AFS: Cache volume key already in use (afs,station.com,20000019)
[363230.248706] BUG: kernel NULL pointer dereference, address: 0000000000000010
[363230.249155] #PF: supervisor read access in kernel mode
[363230.249574] #PF: error_code(0x0000) - not-present page
[363230.249980] PGD 0 P4D 0 
[363230.250372] Oops: Oops: 0000 [#1] SMP PTI
[363230.250771] CPU: 1 UID: 0 PID: 416294 Comm: kworker/u65:4 Tainted: G          I         6.16.0-rc3 #1 VOLUNTARY 
[363230.251196] Tainted: [I]=FIRMWARE_WORKAROUND
[363230.251618] Hardware name: Hewlett-Packard HP Z600 Workstation/0AE8h, BIOS 786G4 v03.19 03/11/2011
[363230.252062] Workqueue: kafsd afs_process_async_call [kafs]
[363230.252540] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x1b0 [kafs]
[363230.253021] Code: 4a 3c 01 0f 84 ac 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 69 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 2b 01 00 00 48 c7 c7 d0 5e fe c1 e8 1f
[363230.253536] RSP: 0018:ffff945fe7eabe08 EFLAGS: 00010246
[363230.254080] RAX: 0000000000000000 RBX: ffff92a9726f5800 RCX: 0000000000000010
[363230.254626] RDX: ffff92a823b71f00 RSI: ffff92a9779ff880 RDI: ffff92a823b71f00
[363230.255168] RBP: ffff92a9726f5820 R08: ffff92a7db828800 R09: 77000000aaffffff
[363230.255715] R10: 0000000000000000 R11: ffff92a7efe91a00 R12: ffff92a9726f5800
[363230.256271] R13: ffff92a8c0091800 R14: ffff92a8de2b0645 R15: ffff92a8cfae0840
[363230.256833] FS:  0000000000000000(0000) GS:ffff92a9b462c000(0000) knlGS:0000000000000000
[363230.257427] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[363230.258011] CR2: 0000000000000010 CR3: 0000000311018000 CR4: 00000000000026f0
[363230.258603] Call Trace:
[363230.259201]  <TASK>
[363230.259798]  afs_deliver_to_call+0x54/0x480 [kafs]
[363230.260419]  afs_process_async_call+0x6e/0x90 [kafs]
[363230.261025]  process_one_work+0x13c/0x220
[363230.261604]  worker_thread+0x2ca/0x400
[363230.262182]  ? __pfx_worker_thread+0x10/0x10
[363230.262780]  kthread+0xd1/0x1b0
[363230.263341]  ? __pfx_kthread+0x10/0x10
[363230.263887]  ? __pfx_kthread+0x10/0x10
[363230.264431]  ret_from_fork+0x71/0xd0
[363230.264981]  ? __pfx_kthread+0x10/0x10
[363230.265534]  ret_from_fork_asm+0x1a/0x30
[363230.266097]  </TASK>
[363230.266652] Modules linked in: bluetooth ecdh_generic ecc libaes uinput md5 algif_hash af_alg ip6table_nat
ip6table_filter iptable_nat xt_MASQUERADE nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter af_packet
veth rc_dib0700_rc5 bridge stp llc si2157 si2168 kafs fcrypt pcbc rxrpc krb5 dns_resolver netfs mt2060 cx23885 altera_ci
tda18271 dvb_usb_dib0700 intel_powerclamp altera_stapl dib9000 m88ds3103 snd_hda_codec_realtek cx2341x tveeprom dib7000m
snd_hda_codec_generic dib0090 videobuf2_dvb dib0070 snd_hda_scodec_component snd_usb_audio snd_hda_codec_hdmi joydev
i2c_mux dib3000mc videobuf2_dma_sg kvm_intel mousedev dibx000_common snd_hda_intel videobuf2_memops snd_ump
videobuf2_v4l2 dvb_usb snd_usbmidi_lib snd_intel_dspcfg kvm videodev snd_hwdep dvb_core snd_hda_codec snd_rawmidi
irqbypass videobuf2_common snd_hda_core snd_seq_device gpio_ich bfq evdev intel_cstate rc_core wmi_bmof cp210x mc
snd_pcm regmap_i2c intel_uncore snd_timer acpi_cpufreq pcspkr input_leds usbserial snd cfg80211 tiny_power_button
[363230.266753]  i7core_edac soundcore lpc_ich rfkill edac_core rtc_cmos button sch_fq_codel ip6_tables ip_tables
x_tables wireguard curve25519_x86_64 libchacha20poly1305 libcurve25519_generic libpoly1305 poly1305_x86_64 chacha_x86_64
libchacha ip6_udp_tunnel udp_tunnel smsc47b397 coretemp tun loop fuse configfs crc32c_cryptoapi hid_logitech_hidpp
amdgpu hid_logitech_dj drm_suballoc_helper amdxcp i2c_algo_bit drm_client_lib mfd_core drm_ttm_helper syscopyarea ttm
agpgart sysfillrect sysimgblt fb_sys_fops drm_exec gpu_sched video hid_generic drm_panel_backlight_quirks cec usbmouse
usbkbd usbhid sr_mod drm_buddy sd_mod cdrom drm_display_helper drm_kms_helper ahci uhci_hcd drm libahci ehci_pci
drm_panel_orientation_quirks psmouse fb nvme_tcp ehci_hcd serio_raw libata nvme_fabrics tg3 atkbd backlight libps2
nvme_core vivaldi_fmap sha512_ssse3 ptp font usbcore scsi_mod pps_core lcd hwmon ledtrig_backlight scsi_common i2c_core
usb_common crc16 wmi i8042 floppy serio btrfs blake2b_generic xor raid6_pq zstd_compress nfnetlink
[363230.270290]  dmi_sysfs sha1_generic sha1_ssse3 ipv6 autofs4
[363230.275339] CR2: 0000000000000010
[363230.276224] ---[ end trace 0000000000000000 ]---
[363230.277144] RIP: 0010:afs_deliver_cb_init_call_back_state3+0x38/0x1b0 [kafs]
[363230.278088] Code: 4a 3c 01 0f 84 ac 00 00 00 8b 83 48 01 00 00 83 f8 05 0f 85 69 01 00 00 48 8b 83 a0 00 00 00 48 8b
93 b0 00 00 00 48 8d 48 10 <48> 8b 40 10 48 39 02 0f 84 2b 01 00 00 48 c7 c7 d0 5e fe c1 e8 1f
[363230.279064] RSP: 0018:ffff945fe7eabe08 EFLAGS: 00010246
[363230.280065] RAX: 0000000000000000 RBX: ffff92a9726f5800 RCX: 0000000000000010
[363230.281034] RDX: ffff92a823b71f00 RSI: ffff92a9779ff880 RDI: ffff92a823b71f00
[363230.281991] RBP: ffff92a9726f5820 R08: ffff92a7db828800 R09: 77000000aaffffff
[363230.282956] R10: 0000000000000000 R11: ffff92a7efe91a00 R12: ffff92a9726f5800
[363230.283928] R13: ffff92a8c0091800 R14: ffff92a8de2b0645 R15: ffff92a8cfae0840
[363230.284908] FS:  0000000000000000(0000) GS:ffff92a9b462c000(0000) knlGS:0000000000000000
[363230.285903] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[363230.286902] CR2: 0000000000000010 CR3: 0000000311018000 CR4: 00000000000026f0
[363230.287915] note: kworker/u65:4[416294] exited with irqs disabled
[363252.382733] AFS: Cache volume key already in use (afs,station.com,20000019)
[363292.387565] AFS: Cache volume key already in use (afs,station.com,20000019)
[363316.888183] DMAR: DRHD: handling fault status reg 502
[363316.889273] DMAR: [DMA Read NO_PASID] Request device [05:00.0] fault addr 0xfbc3a000 [fault reason 0x06] PTE Read
access is not set
[363492.399719] AFS: Cache volume key already in use (afs,station.com,20000019)
[363552.414314] AFS: Cache volume key already in use (afs,station.com,20000019)
[363592.421306] AFS: Cache volume key already in use (afs,station.com,20000019)
[363792.450845] AFS: Cache volume key already in use (afs,station.com,20000019)
[363821.037280] DMAR: DRHD: handling fault status reg 602
[363821.038371] DMAR: [DMA Read NO_PASID] Request device [05:00.0] fault addr 0xff8e2000 [fault reason 0x06] PTE Read
access is not set
[363852.465454] AFS: Cache volume key already in use (afs,station.com,20000019)
[363892.471550] AFS: Cache volume key already in use (afs,station.com,20000019)
[364092.492803] AFS: Cache volume key already in use (afs,station.com,20000019)
[364152.506195] AFS: Cache volume key already in use (afs,station.com,20000019)
[364192.518646] AFS: Cache volume key already in use (afs,station.com,20000019)
[364392.532849] AFS: Cache volume key already in use (afs,station.com,20000019)