https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4103/shard-kbl7/igt@gem_exec_capture@capture-bsd.html

from pstore:
<5>[   61.743080] i915 0000:00:02.0: Resetting chip after gpu hang
<3>[   61.744723] i915 0000:00:02.0: GPU recovery failed
<3>[   61.760447] GEM_BUG_ON(buf[2 * head + 1] != port->context_id)
<4>[   61.760508] ------------[ cut here ]------------
<2>[   61.760512] kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:903!
<4>[   61.760555] invalid opcode: 0000 [#1] PREEMPT SMP
<0>[   61.760566] Dumping ftrace buffer:
<0>[   61.760575] ---------------------------------
<0>[   61.760641] CPU:1 [LOST 155 EVENTS]
...
<4>[   61.773445] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel crct10dif_pclmul snd_hda_codec crc32_pclmul e1000e snd_hwdep snd_hda_core ghash_clmulni_intel snd_pcm ptp mei_me pps_core mei prime_numbers
<4>[   61.773485] CPU: 0 PID: 1770 Comm: gem_exec_captur Tainted: G     U  W        4.15.0-rc4-CI-CI_DRM_3569+ #1
<4>[   61.773494] Hardware name:                  /NUC7i5BNB, BIOS BNKBL357.86A.0054.2017.1025.1822 10/25/2017
<4>[   61.773519] RIP: 0010:execlists_submission_tasklet+0x446/0xd60 [i915]
<4>[   61.773526] RSP: 0018:ffff88047ec03ea8 EFLAGS: 00010296
<4>[   61.773532] RAX: 0000000000000031 RBX: 0000000000000018 RCX: 0000000000000102
<4>[   61.773538] RDX: 0000000080000102 RSI: ffffffff81d1305f RDI: 00000000ffffffff
<4>[   61.773545] RBP: ffff88047ec03f20 R08: ffff88046583d940 R09: 0000000054510a74
<4>[   61.773552] R10: 000000000000000c R11: 0000000000000000 R12: ffff880464bf0010
<4>[   61.773558] R13: ffff8804627b104c R14: 0000000000000001 R15: ffff880464bf0008
<4>[   61.773565] FS:  00007facc36978c0(0000) GS:ffff88047ec00000(0000) knlGS:0000000000000000
<4>[   61.773573] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[   61.773579] CR2: 000055d5ded5a130 CR3: 0000000465718002 CR4: 00000000003606f0
<4>[   61.773585] Call Trace:
<4>[   61.773590]  <IRQ>
<4>[   61.773598]  tasklet_hi_action+0x89/0x110
<4>[   61.773606]  __do_softirq+0xc1/0x4aa
<4>[   61.773612]  irq_exit+0xa4/0xb0
<4>[   61.773617]  do_IRQ+0x67/0x120
<4>[   61.773622]  common_interrupt+0x93/0x93
<4>[   61.773626]  </IRQ>
<4>[   61.773630] RIP: 0010:_raw_spin_unlock_irqrestore+0x4e/0x60
<4>[   61.773636] RSP: 0018:ffffc900006c3b58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd6
<4>[   61.773644] RAX: ffff88046583d040 RBX: 0000000000000246 RCX: 0000000000000006
<4>[   61.773651] RDX: 0000000000001432 RSI: ffffffff81d070c9 RDI: ffffffff81cb860e
<4>[   61.773658] RBP: ffff8804605480b0 R08: ffff88046583d940 R09: 0000000054510a74
<4>[   61.773665] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa027da0c
<4>[   61.773671] R13: ffff880464a876a0 R14: ffff8804603d6fd8 R15: ffff880464a876a0
<4>[   61.773682]  __irq_put_desc_unlock+0x13/0x40
<4>[   61.773688]  enable_irq+0x42/0x60
<4>[   61.773707]  i915_reset+0xcd/0x270 [i915]
<4>[   61.773727]  i915_reset_device+0x1cb/0x230 [i915]
<4>[   61.773747]  ? gen8_gt_irq_ack+0x160/0x160 [i915]
<4>[   61.773755]  ? work_on_cpu_safe+0x50/0x50
<4>[   61.773775]  i915_handle_error+0x2d3/0x430 [i915]
<4>[   61.773784]  ? __might_fault+0x39/0x90
<4>[   61.773790]  ? __might_fault+0x39/0x90
<4>[   61.773812]  i915_wedged_set+0x79/0xc0 [i915]
<4>[   61.773819]  simple_attr_write+0xab/0xc0
<4>[   61.773826]  full_proxy_write+0x4b/0x70
<4>[   61.773831]  __vfs_write+0x1e/0x130
<4>[   61.773837]  ? rcu_read_lock_sched_held+0x6f/0x80
<4>[   61.773842]  ? rcu_sync_lockdep_assert+0x25/0x50
<4>[   61.773848]  ? __sb_start_write+0xd9/0x1f0
<4>[   61.773853]  ? __sb_start_write+0xf3/0x1f0
<4>[   61.773858]  vfs_write+0xbd/0x1b0
<4>[   61.773863]  SyS_write+0x40/0xa0
<4>[   61.773869]  entry_SYSCALL_64_fastpath+0x1c/0x89
<4>[   61.773874] RIP: 0033:0x7facc1e7d670
<4>[   61.773878] RSP: 002b:00007ffe9d109dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
<4>[   61.773886] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007facc1e7d670
<4>[   61.773893] RDX: 0000000000000002 RSI: 000055559360254e RDI: 0000000000000007
<4>[   61.773899] RBP: 0000000000000001 R08: 000055559510fed0 R09: 0000000000000000
<4>[   61.773906] R10: 0000000000000000 R11: 0000000000000246 R12: 00007facc375d000
<4>[   61.773913] R13: 0000000000000009 R14: 00007facc375c000 R15: 0000000000000003
<4>[   61.773922] Code: 41 0f ba b7 40 04 00 00 01 44 3b 75 d0 0f 85 f0 fc ff ff e9 fa fe ff ff 48 c7 c6 40 f4 29 a0 48 c7 c7 5e 3d 28 a0 e8 cf b0 f2 e0 <0f> 0b 4c 8d ab 60 15 00 00 4c 89 5d b0 4c 89 ef e8 65 e1 6f e1 
<1>[   61.773996] RIP: execlists_submission_tasklet+0x446