<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 - NULL pointer dereference"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88855">88855</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>NULL pointer dereference
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</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>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>josefkindberg@hotmail.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=112922" name="attach_112922" title="dmesg log">attachment 112922</a> <a href="attachment.cgi?id=112922&action=edit" title="dmesg log">[details]</a></span>
dmesg log
[31797.321348] BUG: unable to handle kernel NULL pointer dereference at
(null)
[31797.321491] IP: [<ffffffff821e94e8>] pipe_write+0x88/0x450
[31797.321558] PGD 14ce36067 PUD 14cd33067 PMD 0
[31797.321608] Oops: 0000 [#1] SMP
[31797.321644] Modules linked in: rfcomm bnep bluetooth 6lowpan_iphc
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic joydev
binfmt_misc eeepc_wmi asus_wmi sparse_keymap mxm_wmi intel_rapl
intel_powerclamp coretemp kvm_intel kvm arc4 crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel cryptd ath9k ath9k_common ath9k_hw ath mac80211 serio_raw
lpc_ich cfg80211 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
snd_pcm i915 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq drm_kms_helper
snd_seq_device drm snd_timer mac_hid video i2c_algo_bit parport_pc snd
snd_soc_sst_acpi mei_txe tpm_infineon iosf_mbi shpchp ppdev mei wmi soundcore
lp parport nls_iso8859_1 hid_chicony usbhid hid psmouse r8169 mii ahci libahci
[31797.322388] CPU: 1 PID: 2493 Comm: wineserver Not tainted 3.16.0-29-generic
#39-Ubuntu
[31797.322459] Hardware name: ASUSTeK Computer INC. EB1037/EB1037, BIOS 0606
05/28/2014
[31797.322529] task: ffff88014cda0a30 ti: ffff88014cdbc000 task.ti:
ffff88014cdbc000
[31797.322596] RIP: 0010:[<ffffffff821e94e8>] [<ffffffff821e94e8>]
pipe_write+0x88/0x450
[31797.322671] RSP: 0018:ffff88014cdbfdf0 EFLAGS: 00010206
[31797.322719] RAX: 0000000000000001 RBX: 0000000000000040 RCX:
0000000000000000
[31797.322782] RDX: 0000000000000040 RSI: ffff88014cdbfe68 RDI:
ffff880088562780
[31797.322845] RBP: ffff88014cdbfe48 R08: 0000000000000040 R09:
ffff88014cdbffd8
[31797.322909] R10: 0000000000f1f152 R11: 0000000000000246 R12:
ffff880088562780
[31797.322972] R13: ffff8801471a0f00 R14: ffff880088448478 R15:
0000000000000000
[31797.323036] FS: 00007f9f141f5740(0000) GS:ffff88015fc80000(0000)
knlGS:0000000000000000
[31797.323108] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[31797.323160] CR2: 0000000000000000 CR3: 000000014ce22000 CR4:
00000000001007e0
[31797.323223] Stack:
[31797.323243] ffff88014cde6000 ffff88014cda0a30 ffff88014cdbfe70
ffffffff82829340
[31797.323318] 000000034cdbfe50 ffff88014cdbfe68 ffff88014cdbff50
ffff8801471a0f00
[31797.323392] 00007fff5d1f2690 0000000000000040 0000000000000000
ffff88014cdbfef8
[31797.323467] Call Trace:
[31797.323497] [<ffffffff821e0991>] new_sync_write+0x81/0xb0
[31797.323550] [<ffffffff821e1177>] vfs_write+0xb7/0x1f0
[31797.323599] [<ffffffff821e1064>] ? vfs_read+0x124/0x180
[31797.323649] [<ffffffff821e1d26>] SyS_write+0x46/0xb0
[31797.323699] [<ffffffff8278a1ad>] system_call_fastpath+0x1a/0x1f
[31797.323753] Code: 8b 4c 24 48 83 e9 01 83 ea 01 21 ca 48 63 d2 48 8d 0c 92
49 8b 94 24 80 00 00 00 4c 8d 34 ca 49 8b 4e 10 41 8b 56 08 45 8b 7e 0c <8b> 31
85 f6 0f 85 ae 02 00 00 66 0f 1f 44 00 00 45 31 ff 31 db
[31797.324089] RIP [<ffffffff821e94e8>] pipe_write+0x88/0x450
[31797.324146] RSP <ffff88014cdbfdf0>
[31797.324179] CR2: 0000000000000000
[31797.335746] ---[ end trace e422fcf92a73800b ]---
[31825.462941] [drm] stuck on render ring
[31825.469488] [drm] GPU HANG: ecode 0:0x85fffffd, in Xorg [1569], reason: Ring
hung, action: reset
[31825.469495] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[31825.469497] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[31825.469498] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[31825.469500] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[31825.469502] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[31827.466874] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[31831.474638] [drm] stuck on render ring
[31831.481581] [drm] GPU HANG: ecode 0:0x29fbfbfa, in Xorg [1569], reason: Ring
hung, action: reset
[31833.478512] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[31837.486140] [drm] stuck on render ring
[31837.493108] [drm] GPU HANG: ecode 0:0x29fbfbfa, in Xorg [1569], reason: Ring
hung, action: reset
[31839.490192] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[31843.521969] [drm] stuck on render ring
[31843.528560] [drm] GPU HANG: ecode 0:0x85fffffd, in Xorg [1569], reason: Ring
hung, action: reset
[31845.525911] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[31849.533721] [drm] stuck on render ring
[31849.540194] [drm] GPU HANG: ecode 0:0x85fffffd, in Xorg [1569], reason: Ring
hung, action: reset
[31849.550808] [drm:i915_context_is_banned] *ERROR* gpu hanging too fast,
banning!
[31851.537659] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off</pre>
</div>
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