igt@amdgpu/amd_basic@userptr - dmesg-warn - DEBUG_LOCKS_WARN_ON(lock->magic != lock)

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7586/fi-kbl-8809g/igt@amdgpu_amd_basic@userptr.html

<4> [180.914698] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
<4> [180.914703] WARNING: CPU: 2 PID: 4066 at kernel/locking/mutex.c:941 __mutex_lock+0x66c/0x9c0
<4> [180.914704] Modules linked in: vgem snd_hda_codec_realtek snd_hda_codec_generic amdgpu mei_hdcp x86_pkg_temp_thermal coretemp snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core ghash_clmulni_intel btusb btrtl btbcm btintel bluetooth igb e1000e snd_pcm ptp gpu_sched pps_core ttm ecdh_generic ecc prime_numbers mei_me mei intel_lpss_pci pinctrl_sunrisepoint pinctrl_intel [last unloaded: i915]
<4> [180.914714] CPU: 2 PID: 4066 Comm: amd_basic Tainted: G     U            5.5.0-rc2-CI-CI_DRM_7586+ #1
<4> [180.914731] Hardware name: Intel Corporation NUC8i7HVK/NUC8i7HVB, BIOS HNKBLi70.86A.0047.2018.0718.1706 07/18/2018
<4> [180.914733] RIP: 0010:__mutex_lock+0x66c/0x9c0
<4> [180.914735] Code: c0 0f 84 1e fa ff ff 44 8b 05 50 2d d4 00 45 85 c0 0f 85 0e fa ff ff 48 c7 c6 f1 c9 2c 82 48 c7 c7 0a b5 2b 82 e8 a4 9f 6a ff <0f> 0b e9 f4 f9 ff ff 41 f6 c5 04 0f 84 79 fc ff ff 4c 89 ea 83 e2
<4> [180.914736] RSP: 0018:ffffc900003e3a30 EFLAGS: 00010282
<4> [180.914737] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
<4> [180.914738] RDX: 0000000080000001 RSI: 0000000000000000 RDI: ffffffff8112e35c
<4> [180.914739] RBP: ffffc900003e3ae0 R08: 0000000000000000 R09: 000000000003ae40
<4> [180.914740] R10: ffffc900003e3b00 R11: 0000000000000fe2 R12: 0000000000000000
<4> [180.914762] R13: 0000000000000002 R14: ffff88824f8be5c0 R15: 0000000000000000
<4> [180.914763] FS:  00007f8eafbae500(0000) GS:ffff888276b00000(0000) knlGS:0000000000000000
<4> [180.914764] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [180.914765] CR2: 00007f8eafbe2000 CR3: 0000000274974002 CR4: 00000000003606e0
<4> [180.914766] Call Trace:
<4> [180.914769]  ? __module_address+0x23/0xe0
<4> [180.914794]  ? amdgpu_cs_ioctl+0x14ea/0x1ee0 [amdgpu]
<4> [180.914797]  ? rcu_read_lock_sched_held+0x4d/0x80
<4> [180.914799]  ? dma_fence_init+0x10c/0x140
<4> [180.914822]  ? amdgpu_cs_ioctl+0x14ea/0x1ee0 [amdgpu]
<4> [180.914859]  amdgpu_cs_ioctl+0x14ea/0x1ee0 [amdgpu]
<4> [180.914885]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
<4> [180.914888]  drm_ioctl_kernel+0xa7/0xf0
<4> [180.914890]  drm_ioctl+0x2e1/0x390
<4> [180.914911]  ? amdgpu_cs_find_mapping+0x110/0x110 [amdgpu]
<4> [180.914913]  ? __pm_runtime_resume+0x4f/0x80
<4> [180.914915]  ? _raw_spin_unlock_irqrestore+0x47/0x60
<4> [180.914917]  ? lockdep_hardirqs_on+0xe3/0x1c0
<4> [180.914918]  ? _raw_spin_unlock_irqrestore+0x34/0x60
<4> [180.914937]  amdgpu_drm_ioctl+0x44/0x80 [amdgpu]
<4> [180.914939]  do_vfs_ioctl+0x9c/0x730
<4> [180.914942]  ? __do_page_fault+0x2da/0x4f0
<4> [180.914944]  ksys_ioctl+0x35/0x60
<4> [180.914946]  __x64_sys_ioctl+0x11/0x20
<4> [180.914948]  do_syscall_64+0x4f/0x220
<4> [180.914949]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [180.914950] RIP: 0033:0x7f8eaee2c5d7
<4> [180.914952] Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48
<4> [180.914953] RSP: 002b:00007fffbf5f7df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
<4> [180.914954] RAX: ffffffffffffffda RBX: 000056376c025d00 RCX: 00007f8eaee2c5d7
<4> [180.914955] RDX: 00007fffbf5f7f20 RSI: 00000000c0186444 RDI: 0000000000000006
<4> [180.914956] RBP: 00007fffbf5f7f20 R08: 000056376c025d08 R09: 0000000000000002
<4> [180.914957] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c0186444
<4> [180.914958] R13: 0000000000000006 R14: 00007fffbf5f7e40 R15: 000056376c025230
<4> [180.914961] irq event stamp: 41311
<4> [180.914963] hardirqs last  enabled at (41311): [<ffffffff81247a6d>] __slab_alloc.isra.83.constprop.88+0x4d/0x70
<4> [180.914965] hardirqs last disabled at (41310): [<ffffffff81247a39>] __slab_alloc.isra.83.constprop.88+0x19/0x70
<4> [180.914967] softirqs last  enabled at (41220): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
<4> [180.914968] softirqs last disabled at (40297): [<ffffffff810b932a>] irq_exit+0xba/0xc0
<4> [180.914969] ---[ end trace 7ccbaa7c67fd9538 ]---