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<head>
<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][SHARDS] igt@kms_flip@flip-vs-fences - dmesg-warn - BUG debug_objects_cache (Tainted: *): Poison overwritten"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108951">108951</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CI][SHARDS] igt@kms_flip@flip-vs-fences - dmesg-warn - BUG debug_objects_cache (Tainted: *): Poison overwritten
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin.peres@free.fr
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre><a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5257/shard-apl4/igt%40kms_flip%40flip-vs-fences.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5257/shard-apl4/igt%40kms_flip%40flip-vs-fences.html</a>
<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</pre>
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