igt@i915_pm_rps@reset - abort/timeout - BUG: kernel NULL pointer dereference, address: 00000000000004c8

https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_11526/shard-tglu-8/igt@i915_pm_rps@reset.html

<6> [401.402356] Console: switching to colour dummy device 80x25
<6> [401.402694] [IGT] i915_pm_rps: executing
<7> [401.404677] i915 0000:00:02.0: [drm:i915_gem_open [i915]] 
<7> [401.405388] i915 0000:00:02.0: [drm:i915_drop_caches_set [i915]] Dropping caches: 0x000001dc [0x000001dc]
<7> [401.405586] i915 0000:00:02.0: [drm:i915_gem_open [i915]] 
<7> [401.406223] i915 0000:00:02.0: [drm:i915_gem_open [i915]] 
<6> [401.409798] [IGT] i915_pm_rps: starting subtest reset
<7> [401.410115] i915 0000:00:02.0: [drm:i915_gem_open [i915]] 
<1> [402.668540] BUG: kernel NULL pointer dereference, address: 00000000000004c8
<1> [402.668546] #PF: supervisor read access in kernel mode
<1> [402.668549] #PF: error_code(0x0000) - not-present page
<6> [402.668552] PGD 0 P4D 0 
<4> [402.668555] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
<4> [402.668559] CPU: 4 UID: 0 PID: 1504 Comm: i915_pm_rps Not tainted 6.11.0-rc1-CI_DRM_15176-g0b8d955bfdcf+ #1
<4> [402.668563] Hardware name: Intel(R) Client Systems NUC11TNHi5/NUC11TNBi5, BIOS TNTGL357.0042.2020.1221.1743 12/21/2020
<4> [402.668567] RIP: 0010:i915_gpu_coredump+0x534/0x810 [i915]
<4> [402.668711] Code: 85 34 02 00 00 48 c7 c7 40 c4 73 82 48 8d 35 00 00 00 00 e8 2e c4 8b e0 e8 39 27 8f e0 84 db 75 3a 48 8b 44 24 20 48 8d 55 18 <44> 0f b7 88 c8 04 00 00 48 8b 44 24 28 4c 8b 40 28 48 8b 48 20 48
<4> [402.668718] RSP: 0018:ffffc90002bb3bc0 EFLAGS: 00010246
<4> [402.668721] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90002bb3b7c
<4> [402.668724] RDX: ffff88811f252018 RSI: ffffffff82429f51 RDI: ffffffff82449e3c
<4> [402.668727] RBP: ffff88811f252000 R08: 0000000000000001 R09: 000000000000000e
<4> [402.668730] R10: 0000000000000003 R11: ffff8883a2695c40 R12: 0000000000000000
<4> [402.668733] R13: ffff88811aab4000 R14: ffff888117378800 R15: ffff88810f611400
<4> [402.668735] FS:  00007f115594e140(0000) GS:ffff8884a0100000(0000) knlGS:0000000000000000
<4> [402.668739] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [402.668742] CR2: 00000000000004c8 CR3: 000000012cc64006 CR4: 0000000000f70ef0
<4> [402.668745] PKRU: 55555554
<4> [402.668747] Call Trace:
<4> [402.668749]  <TASK>
<4> [402.668751]  ? __die_body+0x1a/0x60
<4> [402.668755]  ? page_fault_oops+0x155/0x470
<4> [402.668760]  ? do_user_addr_fault+0x63/0x8d0
<4> [402.668763]  ? exc_page_fault+0x68/0x1f0
<4> [402.668768]  ? asm_exc_page_fault+0x26/0x30
<4> [402.668772]  ? i915_gpu_coredump+0x534/0x810 [i915]
<4> [402.668886]  i915_capture_error_state+0xe/0x70 [i915]
<4> [402.668991]  intel_gt_handle_error+0x3e8/0x420 [i915]
<4> [402.669101]  ? __lock_acquire+0x533/0x1ea0
<4> [402.669107]  intel_gt_debugfs_reset_store+0x5c/0xc0 [i915]
<4> [402.669208]  i915_wedged_set+0x1d/0x40 [i915]
<4> [402.669295]  simple_attr_write_xsigned.constprop.0+0xb4/0x110
<4> [402.669301]  full_proxy_write+0x58/0x80
<4> [402.669305]  vfs_write+0xd1/0x550
<4> [402.669309]  ? _raw_spin_unlock_irqrestore+0x58/0x70
<4> [402.669313]  ? lockdep_hardirqs_on+0x7b/0x100
<4> [402.669317]  ? _raw_spin_unlock_irqrestore+0x41/0x70
<4> [402.669320]  ? do_sys_openat2+0x1d9/0x2a0
<4> [402.669325]  ksys_write+0x64/0xe0
<4> [402.669328]  do_syscall_64+0x66/0x140
<4> [402.669331]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
<4> [402.669335] RIP: 0033:0x7f115826a2f7
<4> [402.669337] Code: 75 05 48 83 c4 58 c3 e8 f7 33 ff ff 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
<4> [402.669345] RSP: 002b:00007ffe736f99f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
<4> [402.669349] RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 00007f115826a2f7
<4> [402.669352] RDX: 0000000000000014 RSI: 00007ffe736f9a50 RDI: 0000000000000015
<4> [402.669356] RBP: 00007ffe736f9a50 R08: 0000000000000000 R09: 00007ffe736f99a0
<4> [402.669359] R10: 00007f115835c91e R11: 0000000000000246 R12: 0000000000000015
<4> [402.669362] R13: 0000000000000000 R14: 0000000000000015 R15: 0000000000000000
<4> [402.669367]  </TASK>
<4> [402.669368] Modules linked in: vgem drm_shmem_helper fuse snd_hda_codec_hdmi i915 x86_pkg_temp_thermal coretemp mei_hdcp mei_pxp wmi_bmof btusb btrtl kvm_intel btintel btbcm kvm snd_hda_intel snd_intel_dspcfg bluetooth snd_hda_codec snd_hwdep crct10dif_pclmul crc32_pclmul ghash_clmulni_intel prime_numbers i2c_i801 snd_hda_core igc video i2c_mux i2c_algo_bit snd_pcm ptp i2c_smbus ttm mei_me pps_core drm_display_helper thunderbolt mei drm_buddy intel_lpss_pci wmi
<4> [402.669407] CR2: 00000000000004c8
<4> [402.669410] ---[ end trace 0000000000000000 ]---