[Bug 104274] Unable to cleanly unload kernel module: BUG: unable to handle kernel NULL pointer dereference at 0000000000000258 (mutex_lock)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104274

--- Comment #13 from Sverd Johnsen <sverd.johnsen at googlemail.com> ---
Still seen with 4.15.15 and dc=1. Not sure if this always reproduces or not,
havn't tested this in a while.

[13342.285357] [drm] amdgpu: finishing device.
[13342.288330] amdgpu: [powerplay] 
                failed to send message 30a ret is 254 
[13342.288345] amdgpu: [powerplay] 
                failed to send pre message 26b ret is 254 
[13342.369191] BUG: unable to handle kernel NULL pointer dereference at
0000000000000000
[13342.369193] IP:           (null)
[13342.369194] PGD 80000003eed8a067 P4D 80000003eed8a067 PUD 3f027a067 PMD 0 
[13342.369197] Oops: 0010 [#1] PREEMPT SMP PTI
[13342.369198] Modules linked in: nfnetlink_log bluetooth ecdh_generic
amdgpu(-) chash ttm af_packet macvtap macvlan bonding nft_reject_inet
nf_reject_ipv4 nf_reject_ipv6 nft_reject nf_log_ipv6 nf_log_ipv4 nf_log_common
nf_conntrack_ipv6 nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nft_log
nft_ct nf_conntrack xfrm_user xfrm_algo nft_counter nft_meta nft_set_bitmap
nft_set_hash nft_set_rbtree nf_tables_inet cls_u32 nf_tables_ipv6
nf_tables_ipv4 sch_htb dm_cache_smq dm_cache dm_bio_prison dm_persistent_data
dm_bufio libcrc32c raid0 x86_pkg_temp_thermal intel_powerclamp kvm_intel
vhost_net tun vhost tap kvm md_mod snd_hda_codec_realtek snd_hda_codec_generic
snd_hda_codec_hdmi snd_hda_intel intel_cstate intel_uncore snd_hda_codec
intel_rapl_perf efi_pstore snd_hwdep snd_hda_core mei_me plusb snd_pcm
[13342.369219]  input_leds usbnet mei led_class mii efivars tpm_crb crypto_user
efivarfs algif_skcipher af_alg joydev mousedev psmouse atkbd libps2
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcspkr tpm_tis tpm_tis_core
shpchp thermal fan tpm i8042 acpi_pad vfio_pci irqbypass vfio_virqfd
vfio_iommu_type1 vfio
[13342.369230] CPU: 1 PID: 18251 Comm: rmmod Not tainted 4.15.15-5-ph #2
[13342.369232] Hardware name: Gigabyte Technology Co., Ltd.
Z170X-UD3/Z170X-UD3-CF, BIOS F23d 12/01/2017
[13342.369233] RIP: 0010:          (null)
[13342.369234] RSP: 0018:ffffb40e025e7d00 EFLAGS: 00010282
[13342.369235] RAX: 0000000000000000 RBX: ffff8ee9c9c1b420 RCX:
0000000180200011
[13342.369236] RDX: 0000000180200012 RSI: 0000000000005c02 RDI:
ffff8ee989680f60
[13342.369236] RBP: ffff8ee9ac57da90 R08: 0000000000000001 R09:
ffff8ee982daae00
[13342.369237] R10: ffff8ee9ccc01900 R11: 0000000000023610 R12:
0000000000000003
[13342.369238] R13: ffff8ee9ca032f18 R14: 0000000000000000 R15:
0000000000000000
[13342.369239] FS:  00007f738c970b80(0000) GS:ffff8ee9dec80000(0000)
knlGS:0000000000000000
[13342.369240] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[13342.369241] CR2: 0000000000000000 CR3: 000000033ee74001 CR4:
00000000003606e0
[13342.369241] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[13342.369242] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[13342.369243] Call Trace:
[13342.369258]  ? destroy+0x23/0xb0 [amdgpu]
[13342.369269]  ? dal_i2caux_destruct+0x6a/0xb0 [amdgpu]
[13342.369278]  ? destroy+0x10/0x30 [amdgpu]
[13342.369288]  ? dal_i2caux_destroy+0x1d/0x30 [amdgpu]
[13342.369297]  ? destruct+0x89/0x110 [amdgpu]
[13342.369306]  ? dc_destroy+0xc/0x20 [amdgpu]
[13342.369318]  ? dm_hw_fini+0x19/0x20 [amdgpu]
[13342.369323]  ? amdgpu_fini+0x9c/0x310 [amdgpu]
[13342.369329]  ? amdgpu_device_fini+0x5f/0x1c0 [amdgpu]
[13342.369334]  ? amdgpu_driver_unload_kms+0x45/0x90 [amdgpu]
[13342.369336]  ? drm_dev_unregister+0x3a/0xe0
[13342.369341]  ? amdgpu_pci_remove+0x14/0x40 [amdgpu]
[13342.369344]  ? pci_device_remove+0x36/0xb0
[13342.369346]  ? device_release_driver_internal+0x155/0x220
[13342.369347]  ? driver_detach+0x32/0x70
[13342.369349]  ? bus_remove_driver+0x4c/0xc0
[13342.369350]  ? pci_unregister_driver+0x24/0x90
[13342.369359]  ? amdgpu_exit+0x11/0x3b6 [amdgpu]
[13342.369361]  ? SyS_delete_module+0x19d/0x230
[13342.369363]  ? do_syscall_64+0x5b/0x100
[13342.369365]  ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[13342.369366] Code:  Bad RIP value.
[13342.369368] RIP:           (null) RSP: ffffb40e025e7d00
[13342.369369] CR2: 0000000000000000
[13342.369370] ---[ end trace 9551ca9b94f5680d ]---

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