igt@i915_selftest@live@migrate - dmesg-warn - RIP: 0010:queue_delayed_work_on

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11449/fi-bsw-n3050/igt@i915_selftest@live@migrate.html

<4> [428.820351] WARNING: held lock freed!
<4> [428.820355] 5.18.0-rc1-CI-CI_DRM_11449+ #1 Tainted: G     U           
<4> [428.820360] -------------------------
<4> [428.820363] igt-1/5824 is freeing memory ffff88812b002640-ffff88812b002e37, with a lock still held there!
<4> [428.820370] ffff88812b0027e8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_ww_ctx_backoff+0xbc/0x160 [i915]
<4> [428.820827] 3 locks held by igt-1/5824:
<4> [428.820832]  #0: ffffc90000573e90 (reservation_ww_class_acquire){+.+.}-{0:0}, at: copy+0xf8/0x890 [i915]
<4> [428.821226]  #1: ffff88812b0027e8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_ww_ctx_backoff+0xbc/0x160 [i915]
<4> [428.821640]  #2: ffffffff827370c0 (rcu_callback){....}-{0:0}, at: rcu_core+0x30d/0x950
<4> [428.821659] 
stack backtrace:
<4> [428.821664] CPU: 1 PID: 5824 Comm: igt-1 Tainted: G     U            5.18.0-rc1-CI-CI_DRM_11449+ #1
<4> [428.821671] Hardware name:  /NUC5CPYB, BIOS PYBSWCEL.86A.0079.2020.0420.1316 04/20/2020
<4> [428.821676] Call Trace:
<4> [428.821682]  <IRQ>
<4> [428.821687]  dump_stack_lvl+0x56/0x7b
<4> [428.821698]  debug_check_no_locks_freed.cold.68+0x78/0x7d
<4> [428.821710]  ? __i915_gem_free_object_rcu+0x1b/0x40 [i915]
<4> [428.822114]  kmem_cache_free+0xb6/0x3f0
<4> [428.822125]  __i915_gem_free_object_rcu+0x1b/0x40 [i915]
<4> [428.822525]  rcu_core+0x364/0x950
<4> [428.822535]  ? rcu_core+0x30d/0x950
<4> [428.822545]  __do_softirq+0xdf/0x493
<4> [428.822555]  irq_exit_rcu+0xa6/0xe0
<4> [428.822563]  sysvec_apic_timer_interrupt+0x8a/0xb0
<4> [428.822571]  </IRQ>
<4> [428.822574]  <TASK>
<4> [428.822578]  asm_sysvec_apic_timer_interrupt+0x12/0x20
<4> [428.822585] RIP: 0010:queue_delayed_work_on+0x34/0x80
<4> [428.822594] Code: e3 00 02 00 00 75 28 f0 48 0f ba 2a 00 bd 00 00 00 00 73 4f 48 85 db 75 43 9c 58 f6 c4 02 75 4f 48 85 db 74 01 fb 48 83 c4 20 <89> e8 5b 5d c3 48 89 4c 24 18 48 89 54 24 10 48 89 74 24 08 89 7c
<4> [428.822601] RSP: 0018:ffffc90000573d98 EFLAGS: 00000282
<4> [428.822608] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000006
<4> [428.822612] RDX: 0000000000000000 RSI: ffffffff8239e677 RDI: ffffffff8233ef3f
<4> [428.822617] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
<4> [428.822621] R10: 00000000246969fc R11: 000000005d19c9bd R12: ffff88812b007380
<4> [428.822625] R13: ffff88812b007588 R14: dead000000000122 R15: dead000000000100
<4> [428.822637]  i915_gem_ww_ctx_unlock_all+0xea/0xf0 [i915]
<4> [428.823050]  i915_gem_ww_ctx_backoff+0x1d/0x160 [i915]
<4> [428.823460]  copy+0x2fe/0x890 [i915]
<4> [428.823847]  ? intel_migrate_copy+0x1f0/0x1f0 [i915]
<4> [428.824237]  ? 0xffffffff81000000