Bug 111773

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_373/fi-apl-guc/igt@gem_exec_schedule@preempt-queue-contexts-chain-render.html

<4> [68.956391] CR2: 0000010000000008
<4> [68.956403] ---[ end trace 79d1874e8f68e529 ]---
<4> [71.855033] RIP: 0010:find_get_entries+0x1f9/0x490
<4> [71.855053] Code: 90 00 00 00 48 8b 45 a8 80 45 b2 01 4d 85 ed 48 8d 70 01 48 89 75 a8 74 9b 4d 85 ed 0f 85 dc fe ff ff 44 89 e3 e9 0c ff ff ff <49> 8b 45 08 4c 8d 40 ff a8 01 4d 0f 44 c5 41 8b 40 34 85 c0 74 4c
<4> [71.855086] RSP: 0018:ffffa67a401d7b30 EFLAGS: 00010246
<4> [71.855099] RAX: 000000000000002f RBX: 000000000000000f RCX: ffff9a4d401fd568
<4> [71.855113] RDX: 0000000000000002 RSI: 0000000000000030 RDI: ffffa67a401d7b50
<4> [71.855127] RBP: ffffa67a401d7bb0 R08: fffff74ec9a7d040 R09: 0000000000000000
<4> [71.855141] R10: 0000000000000000 R11: 0000000000000270 R12: 0000000000000004
<4> [71.855155] R13: 0000010000000000 R14: ffffa67a401d7c80 R15: ffffa67a401d7c00
<4> [71.855169] FS:  0000000000000000(0000) GS:ffff9a4d77a80000(0000) knlGS:0000000000000000
<4> [71.855186] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [71.855198] CR2: 0000010000000008 CR3: 0000000265a9c000 CR4: 00000000003406e0
<3> [71.855214] BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:38
<3> [71.855232] in_atomic(): 0, irqs_disabled(): 1, pid: 239, name: kworker/1:2
<4> [71.855245] INFO: lockdep is turned off.
<4> [71.855255] irq event stamp: 12362
<4> [71.855266] hardirqs last  enabled at (12361): [<ffffffffb59f2c44>] _raw_spin_unlock_irq+0x24/0x50
<4> [71.855285] hardirqs last disabled at (12362): [<ffffffffb59ebd7a>] __schedule+0xaa/0x860
<4> [71.855302] softirqs last  enabled at (11724): [<ffffffffb5c0033e>] __do_softirq+0x33e/0x4ae
<4> [71.855321] softirqs last disabled at (11717): [<ffffffffb50bcd79>] irq_exit+0xa9/0xc0
<3> [71.855336] Preemption disabled at:
<4> [71.855339] [<ffffffffb5131cbb>] wake_up_klogd+0xb/0x60
<4> [71.855359] CPU: 1 PID: 239 Comm: kworker/1:2 Tainted: G     UD           5.3.0-g7ca2b123ae99-drmtip_373+ #1
<4> [71.855378] Hardware name: Intel corporation NUC6CAYS/NUC6CAYB, BIOS AYAPLCEL.86A.0056.2018.0926.1100 09/26/2018
<4> [71.855400] Workqueue: events delayed_fput
<4> [71.855410] Call Trace:
<4> [71.855424]  dump_stack+0x67/0x9b
<4> [71.855435]  ___might_sleep+0x167/0x250
<4> [71.855448]  exit_signals+0x2b/0x3c0
<4> [71.855458]  do_exit+0xaf/0xdb0
<4> [71.855470]  ? process_one_work+0x610/0x610
<4> [71.855480]  ? kthread+0x119/0x130
<4> [71.855491]  rewind_stack_do_exit+0x17/0x20
<3> [71.857244] BUG: sleeping function called from invalid context at kernel/nsproxy.c:217
<3> [71.857270] in_atomic(): 0, irqs_disabled(): 0, pid: 239, name: kworker/1:2
<4> [71.857286] INFO: lockdep is turned off.
<3> [71.857298] Preemption disabled at:
<4> [71.857303] [<0000000000000000>] 0x0
<4> [71.857326] CPU: 1 PID: 239 Comm: kworker/1:2 Tainted: G     UD W         5.3.0-g7ca2b123ae99-drmtip_373+ #1
<4> [71.857346] Hardware name: Intel corporation NUC6CAYS/NUC6CAYB, BIOS AYAPLCEL.86A.0056.2018.0926.1100 09/26/2018
<4> [71.857370] Workqueue: events delayed_fput
<4> [71.857381] Call Trace:
<4> [71.857393]  dump_stack+0x67/0x9b
<4> [71.857405]  ___might_sleep+0x167/0x250
<4> [71.857421]  switch_task_namespaces+0x26/0x70
<4> [71.857437]  do_exit+0x356/0xdb0
<4> [71.857452]  ? process_one_work+0x610/0x610
<4> [71.857465]  ? kthread+0x119/0x130
<4> [71.857478]  rewind_stack_do_exit+0x17/0x20
<6> [72.323832] Console: switching to colour frame buffer device 240x67