Bug 111183

https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_327/fi-icl-dsi/igt@gem_exec_await@wide-contexts.html

<6> [55.564103] Console: switching to colour dummy device 80x25
<6> [55.564154] [IGT] gem_exec_await: executing
<6> [55.596692] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 1
<5> [55.729357] Setting dangerous option reset - tainting kernel
<6> [55.737303] [IGT] gem_exec_await: starting subtest wide-contexts
<6> [55.738845] gem_exec_await (1112): drop_caches: 4
<3> [66.140734] =============================================================================
<3> [66.141073] BUG active_node (Tainted: G     U           ): Object padding overwritten
<3> [66.141112] -----------------------------------------------------------------------------

<4> [66.141159] Disabling lock debugging due to kernel taint
<3> [66.141163] INFO: 0x00000000d4b35f55-0x00000000abf6671d. First byte 0x58 instead of 0x5a
<3> [66.141256] INFO: Allocated in i915_active_ref+0x59/0x200 [i915] age=3493 cpu=5 pid=1112
<3> [66.141275] 	__slab_alloc.isra.28.constprop.34+0x3d/0x70
<3> [66.141286] 	kmem_cache_alloc+0x21c/0x280
<3> [66.141358] 	i915_active_ref+0x59/0x200 [i915]
<3> [66.141433] 	i915_vma_move_to_active+0x4c/0x350 [i915]
<3> [66.141502] 	i915_gem_do_execbuffer+0x12cc/0x20f0 [i915]
<3> [66.141567] 	i915_gem_execbuffer2_ioctl+0x11b/0x430 [i915]
<3> [66.141580] 	drm_ioctl_kernel+0x83/0xf0
<3> [66.141589] 	drm_ioctl+0x2f3/0x3b0
<3> [66.141598] 	do_vfs_ioctl+0xa0/0x6e0
<3> [66.141606] 	ksys_ioctl+0x35/0x60
<3> [66.141614] 	__x64_sys_ioctl+0x11/0x20
<3> [66.141624] 	do_syscall_64+0x55/0x1c0
<3> [66.141636] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [66.141646] INFO: Slab 0x00000000f7fe5a99 objects=32 used=21 fp=0x0000000004782f4f flags=0x8000000000010201
<3> [66.141663] INFO: Object 0x000000001f6cc2f9 @offset=13376 fp=0x000000002383d773

<3> [66.141680] Redzone 00000000: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
<3> [66.141695] Redzone 00000010: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
<3> [66.141710] Redzone 00000020: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
<3> [66.141725] Redzone 00000030: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
<3> [66.141740] Object 00000000: 00 00 00 00 00 00 00 00 48 74 e9 08 f3 95 ff ff  ........Ht......
<3> [66.141755] Object 00000010: 48 74 e9 08 f3 95 ff ff b0 f8 58 c0 ff ff ff ff  Ht........X.....
<3> [66.141770] Object 00000020: d0 de e8 08 f3 95 ff ff 01 00 00 00 00 00 00 00  ................
<3> [66.141785] Object 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [66.141800] Object 00000040: a3 02 00 00 00 00 00 00                          ........
<3> [66.141814] Redzone 00000000: cc cc cc cc cc cc cc cc                          ........
<3> [66.141828] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [66.141843] Padding 00000010: 5a 5a 58 5a 5a 5a 5a 5a 5a 5a 58 5a 5a 5a 5a 5a  ZZXZZZZZZZXZZZZZ
<3> [66.141858] Padding 00000020: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [66.141873] Padding 00000030: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
<4> [66.141889] CPU: 5 PID: 191 Comm: kworker/u16:2 Tainted: G    BU            5.2.0-ga9fbb0055257-drmtip_327+ #1
<4> [66.141891] Hardware name: Intel Corporation Ice Lake Client Platform/IceLake Y LPDDR4x T4 RVP TLC, BIOS ICLSFWR1.R00.3102.A00.1903052247 03/05/2019
<4> [66.141951] Workqueue: i915 retire_work_handler [i915]
<4> [66.141953] Call Trace:
<4> [66.141959]  dump_stack+0x67/0x9b
<4> [66.141964]  check_bytes_and_report+0xbd/0x100
<4> [66.141968]  check_object+0x14e/0x270
<4> [66.141973]  free_debug_processing+0x137/0x370
<4> [66.142031]  ? __active_retire+0x10a/0x190 [i915]
<4> [66.142036]  __slab_free+0x337/0x4f0
<4> [66.142041]  ? mark_held_locks+0x49/0x70
<4> [66.142044]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [66.142047]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [66.142050]  ? lockdep_hardirqs_on+0xe3/0x1b0
<4> [66.142053]  ? _raw_spin_unlock_irqrestore+0x39/0x60
<4> [66.142057]  ? debug_check_no_obj_freed+0x132/0x210
<4> [66.142114]  ? __active_retire+0x10a/0x190 [i915]
<4> [66.142118]  ? kmem_cache_free+0x275/0x2e0
<4> [66.142121]  kmem_cache_free+0x275/0x2e0
<4> [66.142175]  __active_retire+0x10a/0x190 [i915]
<4> [66.142237]  i915_request_retire+0x22b/0x840 [i915]
<4> [66.142297]  ring_retire_requests+0x47/0x50 [i915]
<4> [66.142357]  i915_retire_requests+0x57/0xc0 [i915]
<4> [66.142414]  retire_work_handler+0x27/0x60 [i915]
<4> [66.142418]  process_one_work+0x245/0x610
<4> [66.142424]  worker_thread+0x37/0x380
<4> [66.142428]  ? process_one_work+0x610/0x610
<4> [66.142432]  kthread+0x119/0x130
<4> [66.142435]  ? kthread_park+0x80/0x80
<4> [66.142440]  ret_from_fork+0x3a/0x50
<3> [66.142447] FIX active_node: Restoring 0x00000000d4b35f55-0x00000000abf6671d=0x5a

<6> [79.191111] [IGT] gem_exec_await: exiting, ret=0
<5> [79.191471] Setting dangerous option reset - tainting kernel
<6> [79.256757] Console: switching to colour frame buffer device 180x160