https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_157/fi-gdg-551/igt@gem_exec_reuse@baggage.html

<3> [116.177964] =============================================================================
<3> [116.179217] BUG i915_lut_handle (Tainted: G     U           ): Redzone overwritten
<3> [116.179273] -----------------------------------------------------------------------------\x0a
<3> [116.179343] INFO: 0x000000007013ebfa-0x00000000e3f0e3b6. First byte 0x0 instead of 0xcc
<3> [116.179465] INFO: Allocated in eb_lookup_vmas+0x796/0x1270 [i915] age=6368 cpu=0 pid=1089
<3> [116.179523] \x09kmem_cache_alloc+0x21c/0x280
<3> [116.179616] \x09eb_lookup_vmas+0x796/0x1270 [i915]
<3> [116.179713] \x09i915_gem_do_execbuffer+0x515/0x1820 [i915]
<3> [116.179814] \x09i915_gem_execbuffer2_ioctl+0x21b/0x3f0 [i915]
<3> [116.179856] \x09drm_ioctl_kernel+0x81/0xf0
<3> [116.179886] \x09drm_ioctl+0x2de/0x390
<3> [116.179915] \x09do_vfs_ioctl+0xa0/0x6e0
<3> [116.179946] \x09ksys_ioctl+0x35/0x60
<3> [116.179973] \x09__x64_sys_ioctl+0x11/0x20
<3> [116.180003] \x09do_syscall_64+0x55/0x190
<3> [116.180032] \x09entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [116.180071] INFO: Slab 0x00000000acc00df6 objects=21 used=21 fp=0x          (null) flags=0x4000000000010201
<3> [116.180136] INFO: Object 0x00000000531658cf @offset=8 fp=0x          (null)\x0a
<3> [116.180196] Redzone 000000007013ebfa: 00 00 00 00 cc cc cc cc                          ........
<3> [116.180257] Object 00000000531658cf: 00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de  ................
<3> [116.180320] Object 000000005b5478e6: 00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de  ................
<3> [116.180384] Object 00000000c39fb179: 88 aa e3 2b 22 8c ff ff 9c 28 00 00 6b 6b 6b a5  ...+"....(..kkk.
<3> [116.180448] Redzone 0000000087e9411e: cc cc cc cc cc cc cc cc                          ........
<3> [116.180508] Padding 000000001ace189e: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
<4> [116.180570] CPU: 0 PID: 1089 Comm: gem_exec_reuse Tainted: G    BU            4.20.0-rc5-ga5b8ef7f5d69-drmtip_157+ #1
<4> [116.180641] Hardware name: Dell Inc.                 OptiPlex GX280               /0G8310, BIOS A04 02/09/2005
<4> [116.180707] Call Trace:
<4> [116.180732]  dump_stack+0x67/0x9b
<4> [116.180761]  check_bytes_and_report+0xbd/0x100
<4> [116.180798]  check_object+0x177/0x270
<4> [116.180831]  free_debug_processing+0x137/0x370
<4> [116.180932]  ? i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.180975]  __slab_free+0x337/0x510
<4> [116.181006]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [116.181046]  ? lockdep_hardirqs_on+0xe0/0x1b0
<4> [116.181081]  ? _raw_spin_unlock_irqrestore+0x39/0x60
<4> [116.181123]  ? debug_check_no_obj_freed+0x132/0x210
<4> [116.181229]  ? i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.181270]  ? kmem_cache_free+0x275/0x2e0
<4> [116.181304]  kmem_cache_free+0x275/0x2e0
<4> [116.181404]  i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.181446]  drm_gem_object_release_handle+0x2e/0xb0
<4> [116.181486]  ? drm_gem_object_handle_put_unlocked+0xb0/0xb0
<4> [116.182659]  idr_for_each+0x49/0xd0
<4> [116.183833]  drm_gem_release+0x17/0x20
<4> [116.185003]  drm_file_free.part.0+0x2d0/0x330
<4> [116.186189]  drm_release+0xa9/0x120
<4> [116.187350]  __fput+0xb9/0x1f0
<4> [116.188488]  task_work_run+0x82/0xb0
<4> [116.189610]  do_exit+0x34e/0xd10
<4> [116.190711]  do_group_exit+0x34/0xb0
<4> [116.191794]  __x64_sys_exit_group+0xf/0x10
<4> [116.192861]  do_syscall_64+0x55/0x190
<4> [116.193927]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [116.194976] RIP: 0033:0x7fa3d4955e06
<4> [116.196013] Code: Bad RIP value.
<4> [116.197028] RSP: 002b:00007ffde3c29028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
<4> [116.198090] RAX: ffffffffffffffda RBX: 00007fa3d4c58740 RCX: 00007fa3d4955e06
<4> [116.199171] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
<4> [116.200265] RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffff80
<4> [116.201361] R10: 00007fa3c8dc40c0 R11: 0000000000000246 R12: 00007fa3d4c58740
<4> [116.202468] R13: 0000000000000003 R14: 00007fa3d4c61628 R15: 0000000000000000
<3> [116.203591] FIX i915_lut_handle: Restoring 0x000000007013ebfa-0x00000000e3f0e3b6=0xcc\x0a
<4> [116.205760] 
<4> [116.205761] ======================================================
<4> [116.205762] WARNING: possible circular locking dependency detected
<4> [116.205763] 4.20.0-rc5-ga5b8ef7f5d69-drmtip_157+ #1 Tainted: G     U           
<4> [116.205764] ------------------------------------------------------
<4> [116.205765] gem_exec_reuse/1089 is trying to acquire lock:
<4> [116.205765] 00000000db050603 (&(&pool->lock)->rlock){-.-.}, at: __queue_work+0xbc/0x580
<4> [116.205769] 
<4> [116.205769] but task is already holding lock:
<4> [116.205770] 0000000025dc24b9 (console_owner){-...}, at: console_unlock+0x144/0x5f0
<4> [116.205773] 
<4> [116.205774] which lock already depends on the new lock.
<4> [116.205774] 
<4> [116.205775] 
<4> [116.205775] the existing dependency chain (in reverse order) is:
<4> [116.205776] 
<4> [116.205777] -> #2 (console_owner){-...}:
<4> [116.205779]        vprintk_emit+0xfe/0x320
<4> [116.205780]        printk+0x4d/0x69
<4> [116.205781]        slab_bug+0x5c/0xb0
<4> [116.205781]        check_bytes_and_report+0x90/0x100
<4> [116.205782]        check_object+0x177/0x270
<4> [116.205783]        free_debug_processing+0x137/0x370
<4> [116.205784]        __slab_free+0x337/0x510
<4> [116.205784]        kmem_cache_free+0x275/0x2e0
<4> [116.205785]        i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.205786]        drm_gem_object_release_handle+0x2e/0xb0
<4> [116.205787]        idr_for_each+0x49/0xd0
<4> [116.205787]        drm_gem_release+0x17/0x20
<4> [116.205788]        drm_file_free.part.0+0x2d0/0x330
<4> [116.205789]        drm_release+0xa9/0x120
<4> [116.205789]        __fput+0xb9/0x1f0
<4> [116.205790]        task_work_run+0x82/0xb0
<4> [116.205791]        do_exit+0x34e/0xd10
<4> [116.205791]        do_group_exit+0x34/0xb0
<4> [116.205792]        __x64_sys_exit_group+0xf/0x10
<4> [116.205793]        do_syscall_64+0x55/0x190
<4> [116.205794]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [116.205794] 
<4> [116.205795] -> #1 (&(&n->list_lock)->rlock){-.-.}:
<4> [116.205798]        get_partial_node.isra.29+0x56/0x460
<4> [116.205798]        ___slab_alloc.constprop.34+0x1aa/0x380
<4> [116.205799]        __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [116.205800]        kmem_cache_alloc+0x21c/0x280
<4> [116.205801]        __debug_object_init+0x524/0x550
<4> [116.205801]        __flush_work+0xba/0x310
<4> [116.205802]        deferred_probe_initcall+0x3b/0x90
<4> [116.205803]        do_one_initcall+0x58/0x2e0
<4> [116.205804]        kernel_init_freeable+0x2c9/0x35b
<4> [116.205804]        kernel_init+0x5/0x100
<4> [116.205805]        ret_from_fork+0x3a/0x50
<4> [116.205806] 
<4> [116.205806] -> #0 (&(&pool->lock)->rlock){-.-.}:
<4> [116.205809]        _raw_spin_lock+0x2a/0x40
<4> [116.205810]        __queue_work+0xbc/0x580
<4> [116.205810]        queue_work_on+0x60/0x70
<4> [116.205811]        soft_cursor+0x1f4/0x220
<4> [116.205812]        bit_cursor+0x523/0x5f0
<4> [116.205812]        hide_cursor+0x25/0xa0
<4> [116.205813]        vt_console_print+0x3d4/0x3f0
<4> [116.205814]        console_unlock+0x40e/0x5f0
<4> [116.205814]        vprintk_emit+0xfe/0x320
<4> [116.205815]        printk+0x4d/0x69
<4> [116.205816]        slab_bug+0x5c/0xb0
<4> [116.205816]        check_bytes_and_report+0x90/0x100
<4> [116.205817]        check_object+0x177/0x270
<4> [116.205818]        free_debug_processing+0x137/0x370
<4> [116.205819]        __slab_free+0x337/0x510
<4> [116.205819]        kmem_cache_free+0x275/0x2e0
<4> [116.205820]        i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.205821]        drm_gem_object_release_handle+0x2e/0xb0
<4> [116.205821]        idr_for_each+0x49/0xd0
<4> [116.205822]        drm_gem_release+0x17/0x20
<4> [116.205823]        drm_file_free.part.0+0x2d0/0x330
<4> [116.205824]        drm_release+0xa9/0x120
<4> [116.205824]        __fput+0xb9/0x1f0
<4> [116.205825]        task_work_run+0x82/0xb0
<4> [116.205826]        do_exit+0x34e/0xd10
<4> [116.205826]        do_group_exit+0x34/0xb0
<4> [116.205827]        __x64_sys_exit_group+0xf/0x10
<4> [116.205828]        do_syscall_64+0x55/0x190
<4> [116.205829]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [116.205829] 
<4> [116.205830] other info that might help us debug this:
<4> [116.205830] 
<4> [116.205831] Chain exists of:
<4> [116.205832]   &(&pool->lock)->rlock --> &(&n->list_lock)->rlock --> console_owner
<4> [116.205835] 
<4> [116.205836]  Possible unsafe locking scenario:
<4> [116.205836] 
<4> [116.205837]        CPU0                    CPU1
<4> [116.205838]        ----                    ----
<4> [116.205838]   lock(console_owner);
<4> [116.205840]                                lock(&(&n->list_lock)->rlock);
<4> [116.205842]                                lock(console_owner);
<4> [116.205844]   lock(&(&pool->lock)->rlock);
<4> [116.205845] 
<4> [116.205846]  *** DEADLOCK ***
<4> [116.205847] 
<4> [116.205847] 6 locks held by gem_exec_reuse/1089:
<4> [116.205848]  #0: 00000000136fa04b (drm_global_mutex){+.+.}, at: drm_release+0x38/0x120
<4> [116.205851]  #1: 0000000099e165d0 (&dev->struct_mutex){+.+.}, at: i915_gem_close_object+0x36/0x270 [i915]
<4> [116.205855]  #2: 00000000f7e64cbd (&(&n->list_lock)->rlock){-.-.}, at: free_debug_processing+0x37/0x370
<4> [116.205858]  #3: 0000000017601443 (console_lock){+.+.}, at: vprintk_emit+0xf1/0x320
<4> [116.205861]  #4: 0000000025dc24b9 (console_owner){-...}, at: console_unlock+0x144/0x5f0
<4> [116.205865]  #5: 000000007760c951 (printing_lock){....}, at: vt_console_print+0x73/0x3f0
<4> [116.205868] 
<4> [116.205868] stack backtrace:
<4> [116.205870] CPU: 0 PID: 1089 Comm: gem_exec_reuse Tainted: G     U            4.20.0-rc5-ga5b8ef7f5d69-drmtip_157+ #1
<4> [116.205871] Hardware name: Dell Inc.                 OptiPlex GX280               /0G8310, BIOS A04 02/09/2005
<4> [116.205871] Call Trace:
<4> [116.205872]  dump_stack+0x67/0x9b
<4> [116.205873]  print_circular_bug.isra.16+0x1c8/0x2b0
<4> [116.205874]  __lock_acquire+0x183a/0x1b00
<4> [116.205874]  ? lock_acquire+0xa6/0x1c0
<4> [116.205875]  lock_acquire+0xa6/0x1c0
<4> [116.205876]  ? __queue_work+0xbc/0x580
<4> [116.205876]  _raw_spin_lock+0x2a/0x40
<4> [116.205877]  ? __queue_work+0xbc/0x580
<4> [116.205878]  __queue_work+0xbc/0x580
<4> [116.205878]  queue_work_on+0x60/0x70
<4> [116.205879]  soft_cursor+0x1f4/0x220
<4> [116.205880]  bit_cursor+0x523/0x5f0
<4> [116.205880]  ? update_attr.isra.0+0x80/0x80
<4> [116.205881]  ? fbcon_cursor+0xfb/0x180
<4> [116.205882]  hide_cursor+0x25/0xa0
<4> [116.205882]  vt_console_print+0x3d4/0x3f0
<4> [116.205883]  console_unlock+0x40e/0x5f0
<4> [116.205884]  vprintk_emit+0xfe/0x320
<4> [116.205884]  printk+0x4d/0x69
<4> [116.205885]  slab_bug+0x5c/0xb0
<4> [116.205886]  check_bytes_and_report+0x90/0x100
<4> [116.205886]  check_object+0x177/0x270
<4> [116.205887]  free_debug_processing+0x137/0x370
<4> [116.205888]  ? i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.205889]  __slab_free+0x337/0x510
<4> [116.205889]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [116.205890]  ? lockdep_hardirqs_on+0xe0/0x1b0
<4> [116.205891]  ? _raw_spin_unlock_irqrestore+0x39/0x60
<4> [116.205892]  ? debug_check_no_obj_freed+0x132/0x210
<4> [116.205892]  ? i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.205893]  ? kmem_cache_free+0x275/0x2e0
<4> [116.205894]  kmem_cache_free+0x275/0x2e0
<4> [116.205895]  i915_gem_close_object+0x14e/0x270 [i915]
<4> [116.205895]  drm_gem_object_release_handle+0x2e/0xb0
<4> [116.205896]  ? drm_gem_object_handle_put_unlocked+0xb0/0xb0
<4> [116.205897]  idr_for_each+0x49/0xd0
<4> [116.205898]  drm_gem_release+0x17/0x20
<4> [116.205898]  drm_file_free.part.0+0x2d0/0x330
<4> [116.205899]  drm_release+0xa9/0x120
<4> [116.205900]  __fput+0xb9/0x1f0
<4> [116.205900]  task_work_run+0x82/0xb0
<4> [116.205901]  do_exit+0x34e/0xd10
<4> [116.205902]  do_group_exit+0x34/0xb0
<4> [116.205902]  __x64_sys_exit_group+0xf/0x10
<4> [116.205903]  do_syscall_64+0x55/0x190
<4> [116.205904]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [116.205904] RIP: 0033:0x7fa3d4955e06
<4> [116.205905] Code: Bad RIP value.
<4> [116.205906] RSP: 002b:00007ffde3c29028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
<4> [116.205907] RAX: ffffffffffffffda RBX: 00007fa3d4c58740 RCX: 00007fa3d4955e06
<4> [116.205908] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
<4> [116.205909] RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffff80
<4> [116.205910] R10: 00007fa3c8dc40c0 R11: 0000000000000246 R12: 00007fa3d4c58740
<4> [116.205911] R13: 0000000000000003 R14: 00007fa3d4c61628 R15: 0000000000000000
<3> [116.348283] FIX i915_lut_handle: Object at 0x00000000531658cf not freed