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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] igt@kms_frontbuffer_tracking@psr-1p-pri-indfb-multidraw - icnomplete - softdog - backtrace in dmesg indicates: intel_frontbuffer_flush"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=105959">105959</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[CI] igt@kms_frontbuffer_tracking@psr-1p-pri-indfb-multidraw - icnomplete - softdog - backtrace in dmesg indicates: intel_frontbuffer_flush
          </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/drmtip_16/fi-cfl-s3/igt@kms_frontbuffer_tracking@psr-1p-pri-indfb-multidraw.html">https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_16/fi-cfl-s3/igt@kms_frontbuffer_tracking@psr-1p-pri-indfb-multidraw.html</a>

Fron run.log:
running: igt/kms_frontbuffer_tracking/psr-1p-pri-indfb-multidraw

[68/75] skip: 8, pass: 59, fail: 1 |                            
owatch: TIMEOUT!

from dmesg:
<1>[  539.599239] BUG: unable to handle kernel NULL pointer dereference at
00000000000005e0
<1>[  539.599262] IP: intel_psr_flush+0x64/0x140 [i915]
<6>[  539.599263] PGD 0 P4D 0 
<4>[  539.599266] Oops: 0000 [#1] PREEMPT SMP PTI
<0>[  539.599268] Dumping ftrace buffer:
...
<4>[  539.630887] Modules linked in: vgem cdc_ether usbnet i915 r8152
x86_pkg_temp_thermal mii intel_powerclamp coretemp crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel e1000e mei_me mei prime_numbers
<4>[  539.630898] CPU: 5 PID: 2267 Comm: kms_frontbuffer Tainted: G     U      
    4.16.0-rc7-g1be073153147-drmtip_16+ #1
<4>[  539.630899] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B19.1802080131
02/08/2018
<4>[  539.630919] RIP: 0010:intel_psr_flush+0x64/0x140 [i915]
<4>[  539.630920] RSP: 0018:ffffa479402c7b58 EFLAGS: 00010286
<4>[  539.630922] RAX: 0000000000000000 RBX: ffff97f4113e0000 RCX:
0000000000000001
<4>[  539.630923] RDX: 0000000080000001 RSI: ffffffffffffffff RDI:
0000000000000000
<4>[  539.630924] RBP: 0000000000000100 R08: 000000004e19dbcc R09:
0000000000000000
<4>[  539.630925] R10: ffffa479402c7b58 R11: ffff97f4113ea638 R12:
ffff97f4113ea5d8
<4>[  539.630927] R13: 0000000000000100 R14: 0000000000000004 R15:
ffffffff93e89250
<4>[  539.630928] FS:  00007f6b60eb8980(0000) GS:ffff97f41d340000(0000)
knlGS:0000000000000000
<4>[  539.630929] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  539.630930] CR2: 00000000000005e0 CR3: 00000004494f6003 CR4:
00000000003606e0
<4>[  539.630932] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
<4>[  539.630933] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
<4>[  539.630934] Call Trace:
<4>[  539.630954]  intel_frontbuffer_flush+0x6a/0x80 [i915]
<4>[  539.630975]  intel_prepare_plane_fb+0x2c0/0x5a0 [i915]
<4>[  539.630979]  drm_atomic_helper_prepare_planes+0x4a/0xd0
<4>[  539.630999]  intel_atomic_commit+0xa9/0x320 [i915]
<4>[  539.631002]  set_property_atomic+0x100/0x130
<4>[  539.631005]  drm_mode_obj_set_property_ioctl+0xf1/0x1a0
<4>[  539.631008]  ? drm_mode_obj_find_prop_id+0x40/0x40
<4>[  539.631010]  drm_ioctl_kernel+0x7c/0xf0
<4>[  539.631012]  drm_ioctl+0x2e6/0x3a0
<4>[  539.631014]  ? drm_mode_obj_find_prop_id+0x40/0x40
<4>[  539.631019]  do_vfs_ioctl+0xa0/0x6c0
<4>[  539.631021]  ? __task_pid_nr_ns+0xbd/0x1d0
<4>[  539.631023]  SyS_ioctl+0x36/0x70
<4>[  539.631026]  ? do_syscall_64+0x19/0x1b0
<4>[  539.631048]  do_syscall_64+0x6b/0x1b0
<4>[  539.631051]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
<4>[  539.631052] RIP: 0033:0x7f6b6012a5d7
<4>[  539.631053] RSP: 002b:00007ffe90456698 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
<4>[  539.631055] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
00007f6b6012a5d7
<4>[  539.631056] RDX: 00007ffe904566d0 RSI: 00000000c01864ba RDI:
0000000000000003
<4>[  539.631058] RBP: 00007ffe904566d0 R08: 0000000000000001 R09:
0000000000000000
<4>[  539.631059] R10: 0000000000000000 R11: 0000000000000246 R12:
00000000c01864ba
<4>[  539.631060] R13: 0000000000000003 R14: 0000558e2337a401 R15:
0000558e2337a401
<4>[  539.631076] Code: 48 89 fb 31 f6 4c 89 e7 e8 aa 1b 35 d3 48 8b 83 60 a6
00 00 48 85 c0 0f 84 9f 00 00 00 48 8b 80 48 ff ff ff 48 c7 c6 ff ff ff ff <48>
63 90 e0 05 00 00 b8 01 00 00 00 8d 0c d5 00 00 00 00 48 d3 
<1>[  539.631123] RIP: intel_psr_flush+0x64/0x140 [i915] RSP: ffffa479402c7b58
<4>[  539.631124] CR2: 00000000000005e0
<4>[  539.631126] ---[ end trace 520ee23b7ec0823c ]---
<3>[  539.953232] BUG: sleeping function called from invalid context at
./include/linux/percpu-rwsem.h:34
<3>[  539.953237] in_atomic(): 0, irqs_disabled(): 1, pid: 2267, name:
kms_frontbuffer
<4>[  539.953238] INFO: lockdep is turned off.
<4>[  539.953239] irq event stamp: 371690
<4>[  539.953244] hardirqs last  enabled at (371689): [<000000005bdd2146>]
_raw_spin_unlock_irqrestore+0x4c/0x60
<4>[  539.953246] hardirqs last disabled at (371690): [<000000001e15f6aa>]
error_entry+0x78/0xf0
<4>[  539.953248] softirqs last  enabled at (371304): [<00000000711d937a>]
__do_softirq+0x32b/0x4e1
<4>[  539.953251] softirqs last disabled at (371285): [<000000009aaa05f8>]
irq_exit+0xa4/0xb0
<4>[  539.953253] CPU: 5 PID: 2267 Comm: kms_frontbuffer Tainted: G     UD     
    4.16.0-rc7-g1be073153147-drmtip_16+ #1
<4>[  539.953255] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B19.1802080131
02/08/2018
<4>[  539.953256] Call Trace:
<4>[  539.953259]  dump_stack+0x67/0x95
<4>[  539.953262]  ___might_sleep+0x167/0x250
<4>[  539.953265]  exit_signals+0x2b/0x2d0
<4>[  539.953267]  do_exit+0xa3/0xd40
<4>[  539.953270]  ? SyS_ioctl+0x36/0x70
<4>[  539.953272]  ? do_syscall_64+0x19/0x1b0
<4>[  539.953275]  rewind_stack_do_exit+0x17/0x20</pre>
        </div>
      </p>


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