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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI] igt@kms_fence_pin_leak - incomplete - BUG: unable to handle kernel NULL pointer dereference at 00000000000005e0 IP: intel_fbc_work_fn+0x1f/0x7e0 [i915] -> owatch softdog"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105322">105322</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CI] igt@kms_fence_pin_leak - incomplete - BUG: unable to handle kernel NULL pointer dereference at 00000000000005e0 IP: intel_fbc_work_fn+0x1f/0x7e0 [i915] -> owatch softdog
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI 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>marta.lofstedt@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><a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3860/shard-apl4/igt@kms_fence_pin_leak.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3860/shard-apl4/igt@kms_fence_pin_leak.html</a>
run.log indicates owatch softdog:
running: igt/kms_fence_pin_leak
[36/98] skip: 15, pass: 20, fail: 1 |
owatch: TIMEOUT!
owatch: timeout for /dev/watchdog0 set to 10 (requested 10)
FATAL: command execution failed
from dmesg:
<7>[ 82.387759] [IGT] kms_fence_pin_leak: executing
...
<7>[ 83.566072] [drm:__intel_fbc_disable [i915]] Disabling FBC on pipe A
<1>[ 83.566454] BUG: unable to handle kernel NULL pointer dereference at
00000000000005e0
<1>[ 83.566611] IP: intel_fbc_work_fn+0x1f/0x7e0 [i915]
<6>[ 83.566617] PGD 0 P4D 0
<4>[ 83.566631] Oops: 0000 [#1] PREEMPT SMP NOPTI
<0>[ 83.566641] Dumping ftrace buffer:
<0>[ 83.566649] ---------------------------------
<0>[ 83.566803] systemd--282 2..s. 4931101us :
execlists_submission_tasklet: rcs0 cs-irq head=0 [0], tail=0 [0]
...
<0>[ 83.610411] <idle>-0 1..s1 83538165us :
execlists_submission_tasklet: rcs0 completed ctx=3
<0>[ 83.610418] ---------------------------------
<4>[ 83.610425] Modules linked in: vgem snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic i915 x86_pkg_temp_thermal coretemp
crct10dif_pclmul snd_hda_intel crc32_pclmul snd_hda_codec ghash_clmulni_intel
snd_hwdep snd_hda_core lpc_ich snd_pcm r8169 mii mei_me mei prime_numbers
pinctrl_broxton pinctrl_intel
<4>[ 83.610505] CPU: 1 PID: 207 Comm: kworker/1:2 Tainted: G U
4.16.0-rc3-CI-CI_DRM_3860+ #1
<4>[ 83.610511] Hardware name: /NUC6CAYB, BIOS
AYAPLCEL.86A.0047.2018.0108.1419 01/08/2018
<4>[ 83.610642] Workqueue: events intel_fbc_work_fn [i915]
<4>[ 83.610771] RIP: 0010:intel_fbc_work_fn+0x1f/0x7e0 [i915]
<4>[ 83.610778] RSP: 0018:ffffc9000020fdf0 EFLAGS: 00010286
<4>[ 83.610787] RAX: 0000000000000001 RBX: ffff880261d07928 RCX:
0000000000000001
<4>[ 83.610793] RDX: 0000000000000000 RSI: 00000000ffffffff RDI:
ffff880261d07928
<4>[ 83.610799] RBP: ffffc9000020feb0 R08: ffff880273083018 R09:
00000000dd64bd0b
<4>[ 83.610805] R10: ffffc9000020fde0 R11: 0000000000000001 R12:
0000000000000000
<4>[ 83.610811] R13: 0000000000000000 R14: ffff880261d07710 R15:
ffff880261d07930
<4>[ 83.610818] FS: 0000000000000000(0000) GS:ffff88027fc80000(0000)
knlGS:0000000000000000
<4>[ 83.610824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 83.610830] CR2: 00000000000005e0 CR3: 000000026e8cc000 CR4:
00000000003406e0
<4>[ 83.610836] Call Trace:
<4>[ 83.610857] process_one_work+0x215/0x620
<4>[ 83.610874] worker_thread+0x1ff/0x3a0
<4>[ 83.610887] kthread+0xfb/0x130
<4>[ 83.610895] ? process_one_work+0x620/0x620
<4>[ 83.610903] ? _kthread_create_on_node+0x30/0x30
<4>[ 83.610915] ret_from_fork+0x3a/0x50
<4>[ 83.610933] Code: e1 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55
41 54 55 53 48 89 fb 4c 8d b3 e8 fd ff ff 48 83 ec 28 4c 8b a7 78 fe ff ff <49>
63 94 24 e0 05 00 00 48 89 d0 48 c1 e0 06 48 01 d0 48 8b 97
<1>[ 83.611226] RIP: intel_fbc_work_fn+0x1f/0x7e0 [i915] RSP:
ffffc9000020fdf0
<4>[ 83.611233] CR2: 00000000000005e0
<4>[ 83.611242] ---[ end trace 5b07963c49bde706 ]---
<3>[ 83.810249] BUG: sleeping function called from invalid context at
./include/linux/percpu-rwsem.h:34
<3>[ 83.810255] in_atomic(): 0, irqs_disabled(): 1, pid: 207, name:
kworker/1:2
<4>[ 83.810259] INFO: lockdep is turned off.
<4>[ 83.810262] irq event stamp: 715464
<4>[ 83.810270] hardirqs last enabled at (715463): [<000000005d8a15db>]
_raw_spin_unlock_irq+0x24/0x50
<4>[ 83.810274] hardirqs last disabled at (715464): [<000000009b5f2d2c>]
error_entry+0x3b/0xc0
<4>[ 83.810278] softirqs last enabled at (713346): [<000000003760d88c>]
__do_softirq+0x3a1/0x4aa
<4>[ 83.810284] softirqs last disabled at (713339): [<000000002b4951a8>]
irq_exit+0xa4/0xb0
<4>[ 83.810289] CPU: 1 PID: 207 Comm: kworker/1:2 Tainted: G UD
4.16.0-rc3-CI-CI_DRM_3860+ #1
<4>[ 83.810292] Hardware name: /NUC6CAYB, BIOS
AYAPLCEL.86A.0047.2018.0108.1419 01/08/2018
<4>[ 83.810378] Workqueue: events intel_fbc_work_fn [i915]
<4>[ 83.810383] Call Trace:
<4>[ 83.810392] dump_stack+0x5f/0x86
<4>[ 83.810398] ___might_sleep+0x1d9/0x240
<4>[ 83.810405] exit_signals+0x1b/0x2a0
<4>[ 83.810411] do_exit+0x93/0xcb0
<4>[ 83.810417] ? kthread+0xfb/0x130
<4>[ 83.810422] ? process_one_work+0x620/0x620
<4>[ 83.810427] rewind_stack_do_exit+0x17/0x20
<7>[ 83.810569] [drm:gen8_de_irq_handler [i915]] hotplug event received, stat
0x00000020, dig 0x10001918, pins 0x00000040
<7>[ 83.810641] [drm:intel_hpd_irq_handler [i915]] digital hpd port C - short
<7>[ 83.817446] [drm:intel_dp_hpd_pulse [i915]] got hpd irq on port C - short
pstore just adds the backtrace of the owatch sysrq</pre>
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