System freeze with "Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008"

[qrp73]

Describe the bug

Yesterday, I encountered this issue. It happens in display blank mode when Firefox was playing music on YouTube in a minimized state. At some point, the sound just stopped, and the system froze, becoming unresponsive to the mouse and keyboard. There was an error in the log: "Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008".

Steps to reproduce the behaviour

It randomly happened, so I don't have reliable way to reproduce it.

Device (s)

Raspberry Pi 4 Mod. B

System

$ uname -a && cat /etc/rpi-issue && vcgencmd version
Linux raspi 6.6.51+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.6.51-1+rpt3 (2024-10-08) aarch64 GNU/Linux
Raspberry Pi reference 2023-09-22
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 40f37458ae7cadea1aec913ae10b5e7008ebce0a, stage4
Aug 30 2024 19:17:39 
Copyright (c) 2012 Broadcom
version 2808975b80149bbfe86844655fe45c7de66fc078 (clean) (release) (start)

Logs

Oct 17 20:29:57 raspi rtkit-daemon[1044]: Supervising 8 threads of 5 processes of 1 users.
Oct 17 20:30:28 raspi kernel: ------------[ cut here ]------------
Oct 17 20:30:28 raspi kernel: WARNING: CPU: 1 PID: 47854 at drivers/media/common/videobuf2/videobuf2-core.c:2024 __vb2_queue_cancel+0x220/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel: Modules linked in: tun snd_seq_dummy snd_hrtimer snd_seq lz4 lz4_compress zram zsmalloc brcmfmac_wcc brcmfmac brcmutil cfg80211 bcm2835_codec(C) bcm2835_isp(C) bcm2835_v4l2(C) rpivid_hevc(C) bcm2835_mmal_vchiq(C) v4l2_mem2mem videobuf2_vmalloc binfmt_misc videobuf2_dma_contig videobuf2_memops snd_usb_audio videobuf2_v4l2 videodev rfkill snd_hwdep raspberrypi_hwmon snd_usbmidi_lib snd_rawmidi videobuf2_common joydev raspberrypi_gpiomem vc_sm_cma(C) snd_seq_device snd_bcm2835(C) mc sg nvmem_rmem uio_pdrv_genirq uio i2c_dev fuse dm_mod ip_tables x_tables ipv6 vc4 snd_soc_hdmi_codec drm_display_helper cec drm_dma_helper drm_kms_helper v3d snd_soc_core gpu_sched snd_compress drm_shmem_helper snd_pcm_dmaengine snd_pcm drm drm_panel_orientation_quirks snd_timer i2c_brcmstb snd backlight
Oct 17 20:30:28 raspi kernel: CPU: 1 PID: 47854 Comm: ThreadPoolSingl Tainted: G        WC         6.6.51+rpt-rpi-v8 #1  Debian 1:6.6.51-1+rpt3
Oct 17 20:30:28 raspi kernel: Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT)
Oct 17 20:30:28 raspi kernel: pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
Oct 17 20:30:28 raspi kernel: pc : __vb2_queue_cancel+0x220/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel: lr : __vb2_queue_cancel+0x38/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel: sp : ffffffc082f0bb00
Oct 17 20:30:28 raspi kernel: x29: ffffffc082f0bb00 x28: ffffffdc41aa8d38 x27: ffffffdc419eb0d0
Oct 17 20:30:28 raspi kernel: x26: 0000000000000000 x25: ffffff8041a7a530 x24: ffffff8007cb8600
Oct 17 20:30:28 raspi kernel: x23: 0000000000000000 x22: ffffff8053445028 x21: ffffff8053445028
Oct 17 20:30:28 raspi kernel: x20: 0000000000000009 x19: ffffff8053445028 x18: 0000000000000003
Oct 17 20:30:28 raspi kernel: x17: 0000000100000000 x16: ffffffdc59504440 x15: ffffffc082f0b650
Oct 17 20:30:28 raspi kernel: x14: 0000000000000004 x13: ffffff8041b00028 x12: 0000000000000000
Oct 17 20:30:28 raspi kernel: x11: ffffff80e99c5758 x10: ffffff80e99c56d0 x9 : ffffffdc41a9eae4
Oct 17 20:30:28 raspi kernel: x8 : ffffff80e99c56f8 x7 : 0000000000000000 x6 : 0000000000000228
Oct 17 20:30:28 raspi kernel: x5 : ffffff8041a7a81c x4 : 0000000000000000 x3 : 0000000000000000
Oct 17 20:30:28 raspi kernel: x2 : ffffff807301bd80 x1 : 0000000000000000 x0 : 0000000000000005
Oct 17 20:30:28 raspi kernel: Call trace:
Oct 17 20:30:28 raspi kernel:  __vb2_queue_cancel+0x220/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel:  vb2_core_streamoff+0x2c/0xd0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel:  vb2_streamoff+0x20/0x78 [videobuf2_v4l2]
Oct 17 20:30:28 raspi kernel:  v4l2_m2m_streamoff+0x80/0x160 [v4l2_mem2mem]
Oct 17 20:30:28 raspi kernel:  v4l2_m2m_ioctl_streamoff+0x20/0x38 [v4l2_mem2mem]
Oct 17 20:30:28 raspi kernel:  v4l_streamoff+0x2c/0x40 [videodev]
Oct 17 20:30:28 raspi kernel:  __video_do_ioctl+0x170/0x3e0 [videodev]
Oct 17 20:30:28 raspi kernel:  video_usercopy+0x208/0x770 [videodev]
Oct 17 20:30:28 raspi kernel:  video_ioctl2+0x20/0x40 [videodev]
Oct 17 20:30:28 raspi kernel:  v4l2_ioctl+0x48/0x70 [videodev]
Oct 17 20:30:28 raspi kernel:  __arm64_sys_ioctl+0xb4/0x100
Oct 17 20:30:28 raspi kernel:  invoke_syscall+0x50/0x128
Oct 17 20:30:28 raspi kernel:  el0_svc_common.constprop.0+0x48/0xf0
Oct 17 20:30:28 raspi kernel:  do_el0_svc+0x24/0x38
Oct 17 20:30:28 raspi kernel:  el0_svc+0x40/0xe8
Oct 17 20:30:28 raspi kernel:  el0t_64_sync_handler+0x100/0x130
Oct 17 20:30:28 raspi kernel:  el0t_64_sync+0x190/0x198
Oct 17 20:30:28 raspi kernel: ---[ end trace 0000000000000000 ]---
Oct 17 20:30:28 raspi kernel: videobuf2_common: driver bug: stop_streaming operation is leaving buf 00000000bb832638 in active state
Oct 17 20:30:28 raspi kernel: videobuf2_common: driver bug: stop_streaming operation is leaving buf 0000000028c544a7 in active state
Oct 17 20:30:28 raspi kernel: videobuf2_common: driver bug: stop_streaming operation is leaving buf 00000000dc2a33b0 in active state
Oct 17 20:30:28 raspi kernel: videobuf2_common: driver bug: stop_streaming operation is leaving buf 0000000006450b6f in active state
Oct 17 20:30:28 raspi kernel: videobuf2_common: driver bug: stop_streaming operation is leaving buf 00000000ee9a55c1 in active state
Oct 17 20:30:28 raspi kernel: ------------[ cut here ]------------
Oct 17 20:30:28 raspi kernel: WARNING: CPU: 1 PID: 58726 at drivers/media/common/videobuf2/videobuf2-core.c:1049 vb2_buffer_done+0x27c/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel: Modules linked in: tun snd_seq_dummy snd_hrtimer snd_seq lz4 lz4_compress zram zsmalloc brcmfmac_wcc brcmfmac brcmutil cfg80211 bcm2835_codec(C) bcm2835_isp(C) bcm2835_v4l2(C) rpivid_hevc(C) bcm2835_mmal_vchiq(C) v4l2_mem2mem videobuf2_vmalloc binfmt_misc videobuf2_dma_contig videobuf2_memops snd_usb_audio videobuf2_v4l2 videodev rfkill snd_hwdep raspberrypi_hwmon snd_usbmidi_lib snd_rawmidi videobuf2_common joydev raspberrypi_gpiomem vc_sm_cma(C) snd_seq_device snd_bcm2835(C) mc sg nvmem_rmem uio_pdrv_genirq uio i2c_dev fuse dm_mod ip_tables x_tables ipv6 vc4 snd_soc_hdmi_codec drm_display_helper cec drm_dma_helper drm_kms_helper v3d snd_soc_core gpu_sched snd_compress drm_shmem_helper snd_pcm_dmaengine snd_pcm drm drm_panel_orientation_quirks snd_timer i2c_brcmstb snd backlight
Oct 17 20:30:28 raspi kernel: CPU: 1 PID: 58726 Comm: kworker/1:0 Tainted: G        WC         6.6.51+rpt-rpi-v8 #1  Debian 1:6.6.51-1+rpt3
Oct 17 20:30:28 raspi kernel: Hardware name: Raspberry Pi 4 Model B Rev 1.5 (DT)
Oct 17 20:30:28 raspi kernel: Workqueue: events buffer_work_cb [bcm2835_mmal_vchiq]
Oct 17 20:30:28 raspi kernel: pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
Oct 17 20:30:28 raspi kernel: pc : vb2_buffer_done+0x27c/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel: lr : op_buffer_cb+0x1c8/0x708 [bcm2835_codec]
Oct 17 20:30:28 raspi kernel: sp : ffffffc082823cf0
Oct 17 20:30:28 raspi kernel: x29: ffffffc082823cf0 x28: 0000000000000000 x27: 0000000000000000
Oct 17 20:30:28 raspi kernel: x26: 0000000000000000 x25: ffffff800351bf40 x24: ffffff80bfab8000
Oct 17 20:30:28 raspi kernel: x23: ffffffdc41a97780 x22: ffffff8053445028 x21: 0000000000000000
Oct 17 20:30:28 raspi kernel: x20: ffffff8041b00550 x19: ffffff80d0584800 x18: 0000000000000000
Oct 17 20:30:28 raspi kernel: x17: 0000000000000000 x16: ffffffdc59292548 x15: 0000000000000000
Oct 17 20:30:28 raspi kernel: x14: 001a137add4d501c x13: ffffffdc5954cbb0 x12: 00000000d2a81d91
Oct 17 20:30:28 raspi kernel: x11: 0000000000000254 x10: 0000000000001a40 x9 : ffffffdc41ab8f70
Oct 17 20:30:28 raspi kernel: x8 : ffffff80d0629aa0 x7 : ffffff800351bf80 x6 : 0000000000000020
Oct 17 20:30:28 raspi kernel: x5 : 0000000000000001 x4 : 0000000000640000 x3 : 00000000000493e0
Oct 17 20:30:28 raspi kernel: x2 : 0000000000000004 x1 : 0000000000000005 x0 : 0000000000000000
Oct 17 20:30:28 raspi kernel: Call trace:
Oct 17 20:30:28 raspi kernel:  vb2_buffer_done+0x27c/0x2a0 [videobuf2_common]
Oct 17 20:30:28 raspi kernel:  op_buffer_cb+0x1c8/0x708 [bcm2835_codec]
Oct 17 20:30:28 raspi kernel:  buffer_work_cb+0x78/0xf0 [bcm2835_mmal_vchiq]
Oct 17 20:30:28 raspi kernel:  process_one_work+0x148/0x3b8
Oct 17 20:30:28 raspi kernel:  worker_thread+0x32c/0x450
Oct 17 20:30:28 raspi kernel:  kthread+0x11c/0x128
Oct 17 20:30:28 raspi kernel:  ret_from_fork+0x10/0x20
Oct 17 20:30:28 raspi kernel: ---[ end trace 0000000000000000 ]---
Oct 17 20:30:28 raspi kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
Oct 17 20:30:28 raspi kernel: Mem abort info:
Oct 17 20:30:28 raspi kernel:   ESR = 0x0000000096000005
Oct 17 20:30:28 raspi kernel:   EC = 0x25: DABT (current EL), IL = 32 bits
Oct 17 20:30:28 raspi kernel:   SET = 0, FnV = 0
Oct 17 20:30:28 raspi kernel:   EA = 0, S1PTW = 0
Oct 17 20:30:28 raspi kernel:   FSC = 0x05: level 1 translation fault
Oct 17 20:30:28 raspi kernel: Data abort info:
Oct 17 20:30:28 raspi kernel:   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
Oct 17 20:30:28 raspi kernel:   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
Oct 17 20:30:28 raspi kernel:   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0

Additional context

I'm not sure for 100% but it looks like also there was running chromium at the time when it happens.