https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_406/fi-apl-guc/igt@kms_busy@extended-modeset-hang-oldfb-render-pipe-a.html
<3> [100.542115] =============================================================================
<3> [100.542124] BUG i915_request (Tainted: G     U           ): Padding overwritten. 0x00000000a77ccc0e-0x00000000a77ccc0e
<3> [100.542127] -----------------------------------------------------------------------------

<3> [100.542131] INFO: Slab 0x000000002b117438 objects=28 used=28 fp=0x000000006574c09e flags=0x8000000000010200
<4> [100.542136] CPU: 2 PID: 312 Comm: kworker/2:3 Tainted: G    BU            5.4.0-rc7-g3ff71899c56c-drmtip_406+ #1
<4> [100.542140] Hardware name: Intel corporation NUC6CAYS/NUC6CAYB, BIOS AYAPLCEL.86A.0056.2018.0926.1100 09/26/2018
<4> [100.542237] Workqueue: events heartbeat [i915]
<4> [100.542241] Call Trace:
<4> [100.542253]  dump_stack+0x71/0x9b
<4> [100.542260]  slab_err+0xa8/0xd0
<4> [100.542272]  slab_pad_check.part.58+0xd7/0x160
<4> [100.542357]  ? __i915_request_create+0x5a/0x4a0 [i915]
<4> [100.542361]  check_slab+0x92/0xb0
<4> [100.542366]  alloc_debug_processing+0x7f/0x1a0
<4> [100.542371]  ___slab_alloc.constprop.90+0x756/0x7a0
<4> [100.542455]  ? __i915_request_create+0x5a/0x4a0 [i915]
<4> [100.542543]  ? __i915_request_create+0x5a/0x4a0 [i915]
<4> [100.542547]  ? __slab_alloc.isra.84.constprop.89+0x3d/0x70
<4> [100.542551]  __slab_alloc.isra.84.constprop.89+0x3d/0x70
<4> [100.542635]  ? __i915_request_create+0x5a/0x4a0 [i915]
<4> [100.542639]  kmem_cache_alloc+0x24a/0x2a0
<4> [100.542723]  __i915_request_create+0x5a/0x4a0 [i915]
<4> [100.542798]  heartbeat+0x437/0x5f0 [i915]
<4> [100.542807]  process_one_work+0x26a/0x620
<4> [100.542815]  worker_thread+0x37/0x380
<4> [100.542820]  ? process_one_work+0x620/0x620
<4> [100.542824]  kthread+0x119/0x130
<4> [100.542828]  ? kthread_park+0x80/0x80
<4> [100.542834]  ret_from_fork+0x3a/0x50
<3> [100.542845] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542848] Padding 00000010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542851] Padding 00000020: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542854] Padding 00000030: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542857] Padding 00000040: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542860] Padding 00000050: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542863] Padding 00000060: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542866] Padding 00000070: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542869] Padding 00000080: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542872] Padding 00000090: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542874] Padding 000000a0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542877] Padding 000000b0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542880] Padding 000000c0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542883] Padding 000000d0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542886] Padding 000000e0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542889] Padding 000000f0: 5a 5a 5a 5a 5a 5a 5a 5a 5e 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZ^ZZZZZZZ
<3> [100.542892] Padding 00000100: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542895] Padding 00000110: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542898] Padding 00000120: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542901] Padding 00000130: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542903] Padding 00000140: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542906] Padding 00000150: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542909] Padding 00000160: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542912] Padding 00000170: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542915] Padding 00000180: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542918] Padding 00000190: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542921] Padding 000001a0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542924] Padding 000001b0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542927] Padding 000001c0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542930] Padding 000001d0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542932] Padding 000001e0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542935] Padding 000001f0: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [100.542939] FIX i915_request: Restoring 0x00000000a77ccc0e-0x00000000a77ccc0e=0x5a