<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW]igt/gem_userptr_blits/forked-unsync-swapping-mempressure-normal sporadically causes BUG: unable to handle kernel NULL pointer dereference at 0000000000000101"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89724">89724</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]igt/gem_userptr_blits/forked-unsync-swapping-mempressure-normal sporadically causes BUG: unable to handle kernel NULL pointer dereference at 0000000000000101
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>high
</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>huax.lu@intel.com
</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>Created <span class=""><a href="attachment.cgi?id=114540" name="attach_114540" title="dmesg">attachment 114540</a> <a href="attachment.cgi?id=114540&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
no-working platforms: BDW
==kernel==
--------------------------
drm-intel-nightly/ce08f8ea9b18746b783a00974dd2940474eed0c7
commit ce08f8ea9b18746b783a00974dd2940474eed0c7
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Thu Mar 19 15:53:39 2015 +0100
drm-intel-nightly: 2015y-03m-19d-14h-53m-02s UTC integration manifest
==Bug detailed description==
-----------------------------
It sporadically causes BUG: unable to handle kernel NULL pointer dereference at
0000000000000101 on BDW, Fail rate:1/10
output:
IGT-Version: 1.10-ge7d26df (x86_64) (Linux:
4.0.0-rc4_drm-intel-nightly_294a23_20150321+ x86_64)
Aperture size is 4096 MiB
Total RAM is 3874 MiB
Testing unsynchronized mappings...
dmesg:
[ 135.905373] BUG: unable to handle kernel NULL pointer dereference at
0000000000000101
[ 135.905473] IP: [<0000000000000101>] 0x101
[ 135.905527] PGD a4438067 PUD a4439067 PMD 0
[ 135.905578] Oops: 0010 [#1] SMP
[ 135.905618] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi pcspkr snd_hda_intel snd_hda_controller lpc_ich i2c_i801
mfd_core snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore battery
parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
[ 135.905942] CPU: 1 PID: 4902 Comm: gem_userptr_bli Not tainted
4.0.0-rc4_drm-intel-nightly_294a23_20150321+ #176
[ 135.906030] task: ffff8800a46ca0c0 ti: ffff8800a1480000 task.ti:
ffff8800a1480000
[ 135.906096] RIP: 0010:[<0000000000000101>] [<0000000000000101>] 0x101
[ 135.906164] RSP: 0018:ffff8800a1483d00 EFLAGS: 00010202
[ 135.906213] RAX: 0000000000000101 RBX: 00007f9f798ec000 RCX:
00000000026cd480
[ 135.906279] RDX: ffffffff811347e7 RSI: 00007f9f798eb000 RDI:
ffffea00026cd480
[ 135.906344] RBP: ffff88014978a228 R08: 0000000000000000 R09:
000000000000b626
[ 135.906409] R10: 000000000000b800 R11: 000000000000b6d1 R12:
ffff8800a1483e18
[ 135.906474] R13: ffffea00026cd480 R14: 0000000000000000 R15:
00007f9f79989000
[ 135.906534] FS: 00007f9f891168c0(0000) GS:ffff88014ec40000(0000)
knlGS:0000000000000000
[ 135.906600] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 135.906650] CR2: 0000000000000101 CR3: 000000000259f000 CR4:
00000000003406e0
[ 135.906711] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 135.906766] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 135.906813] Stack:
[ 135.906832] ffffffff810ed796 ffff88014effac00 00007f9f79989000
00007f9f79989000
[ 135.906891] 00007f9f79989000 ffff88009451f7f8 ffff88009464f758
ffff880149327e60
[ 135.906955] 0000000100000001 ffff88014916b3e8 ffff880002cbbf00
00007f9f798eb000
[ 135.907018] Call Trace:
[ 135.907044] [<ffffffff810ed796>] ? unmap_single_vma+0x436/0x628
[ 135.907089] [<ffffffff810ee1fc>] ? unmap_vmas+0x4c/0x7f
[ 135.907130] [<ffffffff810f3903>] ? exit_mmap+0x5b/0xe4
[ 135.907168] [<ffffffff810efadd>] ? handle_mm_fault+0x329/0xc4d
[ 135.907214] [<ffffffff81039981>] ? mmput+0x2c/0xb6
[ 135.907252] [<ffffffff8103ce52>] ? do_exit+0x387/0x909
[ 135.907296] [<ffffffff81032a63>] ? __do_page_fault+0x345/0x3d8
[ 135.907341] [<ffffffff8103dffa>] ? do_group_exit+0x3a/0x8f
[ 135.907383] [<ffffffff8103e05b>] ? SyS_exit_group+0xc/0xc
[ 135.907425] [<ffffffff81799b72>] ? system_call_fastpath+0x12/0x17
[ 135.907467] Code: Bad RIP value.
[ 135.907499] RIP [<0000000000000101>] 0x101
[ 135.907538] RSP <ffff8800a1483d00>
[ 135.907565] CR2: 0000000000000101
[ 135.907593] ---[ end trace b10edcdb671b06f7 ]---
[ 135.907626] Fixing recursive fault but reboot is needed!
==Reproduce steps==
----------------------------
1../gem_userptr_blits --run-subtest forked-unsync-swapping-mempressure-normal</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>