Bug 103605

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3317/shard-apl5/igt@gem_cpu_reloc@full.html

<14>[  919.180103] [IGT] gem_cpu_reloc: executing
<14>[  919.205099] [IGT] gem_cpu_reloc: starting subtest full
<14>[ 1277.204419] [IGT] gem_cpu_reloc: exiting, ret=0
<12>[ 1279.098169] owatch: TIMEOUT!
<12>[ 1279.100783] owatch: timeout for /dev/watchdog0 set to 10 (requested 10)
<6>[ 1279.101390] sysrq: SysRq : Trigger a crash
<1>[ 1279.101870] BUG: unable to handle kernel NULL pointer dereference at           (null)
<1>[ 1279.101997] IP: sysrq_handle_crash+0x45/0x80
<6>[ 1279.102051] PGD 26f504067 P4D 26f504067 PUD 2707cc067 PMD 0 
<4>[ 1279.102160] Oops: 0002 [#1] PREEMPT SMP
<4>[ 1279.102212] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core lpc_ich r8169 snd_pcm mii mei_me mei prime_numbers pinctrl_broxton pinctrl_intel
<4>[ 1279.102685] CPU: 1 PID: 3193 Comm: owatch Tainted: G     U          4.14.0-rc8-CI-CI_DRM_3317+ #1
<4>[ 1279.102783] Hardware name:                  /NUC6CAYB, BIOS AYAPLCEL.86A.0040.2017.0619.1722 06/19/2017
<4>[ 1279.102886] task: ffff8802675ca780 task.stack: ffffc900006ec000
<4>[ 1279.102961] RIP: 0010:sysrq_handle_crash+0x45/0x80
<4>[ 1279.103021] RSP: 0018:ffffc900006efde0 EFLAGS: 00010282
<4>[ 1279.103091] RAX: ffff8802675ca780 RBX: 0000000000000063 RCX: 3c2c166a010a8464
<4>[ 1279.103174] RDX: 0000000000000001 RSI: 00000000e3351684 RDI: ffff8802675ca780
<4>[ 1279.103252] RBP: ffffc900006efde0 R08: ffff8802675cb040 R09: 0000000000000000
<4>[ 1279.103331] R10: 00000000e17ac86b R11: 000000001dd56de0 R12: 0000000000000000
<4>[ 1279.103409] R13: 0000000000000004 R14: ffffffff81ebec20 R15: ffffc900006eff20
<4>[ 1279.103494] FS:  00007fc652fe5700(0000) GS:ffff88027fc80000(0000) knlGS:0000000000000000
<4>[ 1279.103586] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[ 1279.103655] CR2: 0000000000000000 CR3: 000000027076e000 CR4: 00000000003406e0
<4>[ 1279.103734] Call Trace:
<4>[ 1279.103785]  __handle_sysrq+0x132/0x210
<4>[ 1279.103850]  write_sysrq_trigger+0x51/0x60
<4>[ 1279.103913]  proc_reg_write+0x42/0x70
<4>[ 1279.103972]  __vfs_write+0x28/0x130
<4>[ 1279.104029]  ? rcu_read_lock_sched_held+0x7a/0x90
<4>[ 1279.104094]  ? rcu_sync_lockdep_assert+0x2f/0x60
<4>[ 1279.104160]  ? __sb_start_write+0x10c/0x200
<4>[ 1279.104225]  vfs_write+0xc8/0x1c0
<4>[ 1279.104281]  SyS_write+0x49/0xb0
<4>[ 1279.104350]  entry_SYSCALL_64_fastpath+0x1c/0xb1
<4>[ 1279.104411] RIP: 0033:0x7fc652b118f0
<4>[ 1279.104460] RSP: 002b:00007ffcd72afac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
<4>[ 1279.104555] RAX: ffffffffffffffda RBX: ffffffff81492003 RCX: 00007fc652b118f0
<4>[ 1279.104639] RDX: 0000000000000001 RSI: 000000000114d250 RDI: 0000000000000003
<4>[ 1279.104719] RBP: ffffc900006eff88 R08: 00007fc652fe5700 R09: 0000000000000410
<4>[ 1279.104799] R10: 00007fc652ddab58 R11: 0000000000000246 R12: 000000000114d020
<4>[ 1279.104880] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
<4>[ 1279.104977]  ? __this_cpu_preempt_check+0x13/0x20
<4>[ 1279.105049] Code: 34 e8 50 44 b6 ff 48 c7 c2 4b 77 59 81 be 01 00 00 00 48 c7 c7 00 d6 e4 81 e8 78 5f b4 ff c7 05 9e 66 b7 00 01 00 00 00 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 e8 dc 72 b6 ff 84 c0 75 c3 48 c7 
<1>[ 1279.105753] RIP: sysrq_handle_crash+0x45/0x80 RSP: ffffc900006efde0
<4>[ 1279.105825] CR2: 0000000000000000
<4>[ 1279.105880] ---[ end trace f9a98d697bb7bd3d ]---
<0>[ 1281.860503] Kernel panic - not syncing: Fatal exception
<0>[ 1281.860539] Kernel Offset: disabled