Troubleshooting • "Tainted: [C]=CRAP" warning

Code:

[   17.889851] Bluetooth: RFCOMM ver 1.11[  614.194930] ------------[ cut here ]------------[  614.194951] WARNING: CPU: 2 PID: 766 at drivers/gpu/drm/vc4/vc4_hvs.c:1064 __vc4_hvs_stop_channel+0x15c/0x180 [vc4][  614.195054] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep brcmfmac_wcc brcmfmac brcmutil binfmt_misc hci_uart btbcm cfg80211 bluetooth ecdh_generic ecc rfkill cdc_acm libaes raspberrypi_hwmon bcm2835_codec(C) bcm2835_v4l2(C) bcm2835_isp(C) raspberrypi_gpiomem rpi_hevc_dec bcm2835_mmal_vchiq(C) vc_sm_cma(C) v4l2_mem2mem videobuf2_vmalloc videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videodev videobuf2_common mc snd_bcm2835(C) nvmem_rmem uio_pdrv_genirq uio i2c_dev fuse dm_mod ip_tables x_tables ipv6 v3d gpu_sched drm_shmem_helper i2c_brcmstb vc4 snd_soc_hdmi_codec drm_display_helper cec drm_dma_helper drm_kms_helper drm drm_panel_orientation_quirks snd_soc_core snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd backlight[  614.195439] CPU: 2 UID: 0 PID: 766 Comm: Xorg Tainted: G         C         6.12.34+rpt-rpi-v8 #1  Debian 1:6.12.34-1+rpt1~bookworm[  614.195460] Tainted: [C]=CRAP[  614.195467] Hardware name: Raspberry Pi 4 Model B Rev 1.1 (DT)[  614.195476] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)[  614.195491] pc : __vc4_hvs_stop_channel+0x15c/0x180 [vc4][  614.195562] lr : __vc4_hvs_stop_channel+0x50/0x180 [vc4][  614.195628] sp : ffffffc0815cb820[  614.195636] x29: ffffffc0815cb830 x28: 0000000000000003 x27: ffffff8007994508[  614.195663] x26: 000000000000000a x25: 0000000000418958 x24: ffffff8007496000[  614.195688] x23: ffffff80071b1a00 x22: 0000000000000000 x21: ffffff8007994508[  614.195713] x20: ffffff80038c8080 x19: 0000000000000000 x18: 0000000000000000[  614.195736] x17: 0000002000000020 x16: ffffffe460540560 x15: ffffffe40d1ca8de[  614.195760] x14: ffffff8007de4310 x13: 000000001dcd6500 x12: 0000000480000008[  614.195784] x11: ffffffc08002d000 x10: 0000000000000001 x9 : ffffffe40d14fe9c[  614.195807] x8 : ffffffe40d184000 x7 : 0000000000000000 x6 : 00000000ffffff87[  614.195830] x5 : 000000000000002e x4 : 0000000000000000 x3 : 0000000040000000[  614.195853] x2 : 0000000000000000 x1 : 0000000010000000 x0 : 0000000000000000[  614.195876] Call trace:[  614.195883]  __vc4_hvs_stop_channel+0x15c/0x180 [vc4][  614.195951]  vc4_hvs_stop_channel+0x38/0x50 [vc4][  614.196016]  vc4_crtc_disable+0x14c/0x200 [vc4][  614.196082]  vc4_crtc_atomic_disable+0xa0/0xe0 [vc4][  614.196146]  disable_outputs+0x228/0x350 [drm_kms_helper][  614.196243]  drm_atomic_helper_commit_modeset_disables+0x24/0x60 [drm_kms_helper][  614.196332]  vc4_atomic_commit_tail+0xfc/0x920 [vc4][  614.196399]  commit_tail+0xac/0x1a0 [drm_kms_helper][  614.196488]  drm_atomic_helper_commit+0x16c/0x188 [drm_kms_helper][  614.196575]  drm_atomic_commit+0xc0/0x108 [drm][  614.196792]  drm_atomic_connector_commit_dpms+0x118/0x130 [drm][  614.197001]  drm_mode_obj_set_property_ioctl+0x1cc/0x430 [drm][  614.197213]  drm_connector_property_set_ioctl+0x4c/0x80 [drm][  614.197420]  drm_ioctl_kernel+0xcc/0x148 [drm][  614.197626]  drm_ioctl+0x218/0x4e0 [drm][  614.197830]  drm_compat_ioctl+0x118/0x140 [drm][  614.198038]  __arm64_compat_sys_ioctl+0x158/0x180[  614.198061]  invoke_syscall+0x50/0x120[  614.198080]  el0_svc_common.constprop.0+0x48/0xf0[  614.198099]  do_el0_svc_compat+0x24/0x48[  614.198116]  el0_svc_compat+0x2c/0x80[  614.198135]  el0t_32_sync_handler+0x98/0x140[  614.198153]  el0t_32_sync+0x194/0x198[  614.198166] ---[ end trace 0000000000000000 ]---[ 1986.436850] systemd-journald[276]: Retention time reached, rotating.[ 9962.568468] systemd-journald[276]: Retention time reached, rotating.[74365.948220] systemd-journald[276]: Retention time reached, rotating.[92677.521451] systemd-journald[276]: Retention time reached, rotating.[94750.539137] systemd-journald[276]: Retention time reached, rotating.pi@Pi4B:~ $