https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5257/shard-apl4/igt%40kms_flip%40flip-vs-fences.html

<4> [109.292634] ODEBUG: Out of memory. ODEBUG disabled
<3> [109.368226] =============================================================================
<3> [109.368349] BUG debug_objects_cache (Tainted: G     U           ): Poison overwritten
<3> [109.368356] -----------------------------------------------------------------------------\x0a
<4> [109.368363] Disabling lock debugging due to kernel taint
<3> [109.368367] INFO: 0x000000001c5301b0-0x000000006247fe1c. First byte 0x30 instead of 0x6b
<3> [109.368379] INFO: Allocated in __debug_object_init+0x524/0x550 age=153 cpu=0 pid=12
<3> [109.368385] \x09kmem_cache_alloc+0x21c/0x280
<3> [109.368390] \x09__debug_object_init+0x524/0x550
<3> [109.368394] \x09debug_object_activate+0x1e2/0x240
<3> [109.368399] \x09__call_rcu.constprop.40+0x2b/0x200
<3> [109.368405] \x09xas_store+0x336/0x5a0
<3> [109.368410] \x09__delete_from_page_cache+0x137/0x250
<3> [109.368414] \x09delete_from_page_cache+0x40/0x70
<3> [109.368419] \x09truncate_inode_page+0x1d/0x30
<3> [109.368424] \x09shmem_undo_range+0x1d5/0x890
<3> [109.368427] \x09shmem_truncate_range+0x11/0x30
<3> [109.368431] \x09shmem_evict_inode+0xb8/0x1a0
<3> [109.368435] \x09evict+0xcb/0x190
<3> [109.368440] \x09__dentry_kill+0xca/0x190
<3> [109.368444] \x09dentry_kill+0x4b/0x1b0
<3> [109.368448] \x09dput+0x262/0x2c0
<3> [109.368453] \x09__fput+0xf7/0x1f0
<3> [109.368458] INFO: Freed in free_obj_work+0x159/0x210 age=24 cpu=0 pid=12
<3> [109.368462] \x09free_obj_work+0x159/0x210
<3> [109.368466] \x09process_one_work+0x262/0x630
<3> [109.368470] \x09worker_thread+0x37/0x380
<3> [109.368474] \x09kthread+0x119/0x130
<3> [109.368479] \x09ret_from_fork+0x3a/0x50
<3> [109.368483] INFO: Slab 0x0000000092de74e7 objects=21 used=0 fp=0x00000000e727ddad flags=0x8000000000010200
<3> [109.368487] INFO: Object 0x00000000ad4b20c5 @offset=3016 fp=0x00000000c54afc46\x0a
<3> [109.368492] Redzone 00000000bc6b14a4: bb bb bb bb bb bb bb bb                          ........
<3> [109.368496] Object 00000000ad4b20c5: 6b 6b 6b 6b 6b 6b 6b 6b 30 fe 07 00 00 c9 ff ff  kkkkkkkk0.......
<3> [109.368500] Object 000000000c2aa33c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [109.368503] Object 0000000043b0ce75: 6b 6b 6b 6b 6b 6b 6b a5                          kkkkkkk.
<3> [109.368507] Redzone 00000000fb27c995: bb bb bb bb bb bb bb bb                          ........
<3> [109.368511] Padding 00000000eb9dda45: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
<4> [109.368517] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G    BU            4.20.0-rc5-CI-CI_DRM_5257+ #1
<4> [109.368519] Hardware name:  /NUC6CAYB, BIOS AYAPLCEL.86A.0049.2018.0508.1356 05/08/2018
<4> [109.368524] Workqueue: events free_obj_work
<4> [109.368527] Call Trace:
<4> [109.368535]  dump_stack+0x67/0x9b
<4> [109.368540]  check_bytes_and_report+0xbd/0x100
<4> [109.368545]  check_object+0x237/0x280
<4> [109.368550]  __free_slab+0xb4/0x330
<4> [109.368554]  ? free_obj_work+0x159/0x210
<4> [109.368557]  ? free_obj_work+0x159/0x210
<4> [109.368561]  kmem_cache_free+0x279/0x2e0
<4> [109.368565]  free_obj_work+0x159/0x210
<4> [109.368570]  process_one_work+0x262/0x630
<4> [109.368577]  worker_thread+0x37/0x380
<4> [109.368581]  ? process_one_work+0x630/0x630
<4> [109.368584]  kthread+0x119/0x130
<4> [109.368587]  ? kthread_park+0x80/0x80
<4> [109.368592]  ret_from_fork+0x3a/0x50
<3> [109.368601] FIX debug_objects_cache: Restoring 0x000000001c5301b0-0x000000006247fe1c=0x6b\x0a
<4> [109.368619] general protection fault: 0000 [#1] PREEMPT SMP NOPTI
<4> [109.368624] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G    BU            4.20.0-rc5-CI-CI_DRM_5257+ #1
<4> [109.368627] Hardware name:  /NUC6CAYB, BIOS AYAPLCEL.86A.0049.2018.0508.1356 05/08/2018
<4> [109.368632] Workqueue: events free_obj_work
<4> [109.368637] RIP: 0010:free_obj_work+0x16a/0x210
<4> [109.368641] Code: ff eb 16 48 89 45 08 48 89 de 4c 89 2b 4c 89 63 08 48 89 eb e8 77 06 d6 ff 48 8b 2b 48 8b 43 08 48 8b 3d 91 89 22 02 48 85 ed <48> 89 28 75 d4 48 b8 00 01 00 00 00 00 ad de 48 89 de 48 89 03 48
<4> [109.368645] RSP: 0018:ffffc9000007fe30 EFLAGS: 00010202
<4> [109.368649] RAX: 6b6b6b6b6b6b6b6b RBX: ffff88826e326bc8 RCX: 0000000000000000
<4> [109.368652] RDX: 0000000000000002 RSI: 0000000000000001 RDI: ffff888276816a80
<4> [109.368656] RBP: 6b6b6b6b6b6b6b6b R08: 0000000000000000 R09: 0000000000000000
<4> [109.368659] R10: fffffffffffffffc R11: ffffffff82303878 R12: dead000000000200
<4> [109.368662] R13: dead000000000100 R14: 0000000000000000 R15: 0000000000000000
<4> [109.368666] FS:  0000000000000000(0000) GS:ffff888277a00000(0000) knlGS:0000000000000000
<4> [109.368670] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [109.368673] CR2: 00007f3d86f67e80 CR3: 0000000270518000 CR4: 00000000003406f0
<4> [109.368676] Call Trace:
<4> [109.368683]  process_one_work+0x262/0x630
<4> [109.368691]  worker_thread+0x37/0x380
<4> [109.368697]  ? process_one_work+0x630/0x630
<4> [109.368701]  kthread+0x119/0x130
<4> [109.368705]  ? kthread_park+0x80/0x80
<4> [109.368712]  ret_from_fork+0x3a/0x50
<4> [109.368721] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel i915 lpc_ich i2c_i801 r8169 snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm pinctrl_broxton pinctrl_intel mei_me mei prime_numbers