[Bug 105959] [CI] igt at kms_* - incomplete - softdog - backtrace in dmesg indicates: NULL deref in intel_psr_flush

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105959

--- Comment #13 from Martin Peres <martin.peres at free.fr> ---
https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_59/fi-cfl-s3/igt@kms_rotation_crc@sprite-rotation-180.html

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_60/fi-cfl-s3/igt@kms_rotation_crc@sprite-rotation-180.html

<0>[  366.252050] ---------------------------------
<4>[  366.252050] Modules linked in: i2c_dev vgem cdc_ether usbnet r8152 mii
x86_pkg_temp_thermal intel_powerclamp i915 coretemp crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel e1000e mei_me mei prime_numbers
<4>[  366.252050] CPU: 2 PID: 86 Comm: kworker/2:1 Tainted: G     U  W        
4.17.0-rc7-g104ae0f882a6-drmtip_60+ #1
<4>[  366.252050] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B19.1802080131
02/08/2018
<4>[  366.252050] Workqueue: events i915_clflush_work [i915]
<4>[  366.252050] RIP: 0010:intel_psr_flush+0x4f/0x130 [i915]
<4>[  366.252050] RSP: 0018:ffff9dc700397df0 EFLAGS: 00010282
<4>[  366.252050] RAX: 0000000000000000 RBX: ffff8dc4bc780000 RCX:
0000000000000001
<4>[  366.252050] RDX: 0000000080000001 RSI: 0000000000000001 RDI:
0000000000000000
<4>[  366.252050] RBP: 0000000000000002 R08: 00000000068cf6d4 R09:
0000000000000000
<4>[  366.252050] R10: ffff9dc700397df0 R11: ffff8dc4bc78a310 R12:
ffff8dc4bc78a2b0
<4>[  366.252050] R13: 0000000000000002 R14: 0000000000000001 R15:
0000000000000000
<4>[  366.252050] FS:  0000000000000000(0000) GS:ffff8dc4cd280000(0000)
knlGS:0000000000000000
<4>[  366.252050] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  366.252050] CR2: 0000000000000600 CR3: 0000000372210004 CR4:
00000000003606e0
<4>[  366.252050] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
<4>[  366.252050] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
<4>[  366.252050] Call Trace:
<4>[  366.252050]  intel_frontbuffer_flush+0x6a/0x80 [i915]
<4>[  366.252050]  i915_clflush_work+0x73/0x1b0 [i915]
<4>[  366.252050]  process_one_work+0x229/0x6a0
<4>[  366.252050]  worker_thread+0x35/0x380
<4>[  366.252050]  ? process_one_work+0x6a0/0x6a0
<4>[  366.252050]  kthread+0x119/0x130
<4>[  366.252050]  ? kthread_flush_work_fn+0x10/0x10
<4>[  366.252050]  ret_from_fork+0x3a/0x50
<4>[  366.252050] Code: 89 f5 48 89 fb 31 f6 4c 89 e7 e8 8d 36 53 e1 48 8b 83
38 a3 00 00 48 85 c0 0f 84 8b 00 00 00 48 8b 80 48 ff ff ff be 01 00 00 00 <48>
63 90 00 06 00 00 48 c7 c0 ff ff ff ff 8d 0c d5 00 00 00 00 
<1>[  366.252050] RIP: intel_psr_flush+0x4f/0x130 [i915] RSP: ffff9dc700397df0
<4>[  366.252050] CR2: 0000000000000600
<4>[  366.252050] ---[ end trace 51ca355488b86fa0 ]---

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