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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@i915_selftest@live_sanitycheck - incomplete - general protection fault: 0000 [#1] PREEMPT SMP PTI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108789#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@i915_selftest@live_sanitycheck - incomplete - general protection fault: 0000 [#1] PREEMPT SMP PTI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108789">bug 108789</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Speaking of memcorruption, what followed was:
<3> [491.818914]
=============================================================================
<3> [491.818942] BUG kmalloc-16 (Tainted: G UD ): Padding
overwritten. 0x00000000ee2a4830-0x000000006d9ceb26
<3> [491.818966]
-----------------------------------------------------------------------------\x0a
<3> [491.818992] INFO: Slab 0x00000000fe774f07 objects=23 used=23 fp=0x
(null) flags=0x10200
<4> [491.819016] CPU: 0 PID: 6110 Comm: i915_selftest Tainted: G BUD
4.20.0-rc3-CI-CI_DRM_5159+ #1
<4> [491.819037] Hardware name: Dell Inc. OptiPlex GX280
/0G8310, BIOS A04 02/09/2005
<4> [491.819058] Call Trace:
<4> [491.819074] dump_stack+0x67/0x9b
<4> [491.819088] slab_err+0xa8/0xd0
<4> [491.819104] ? _raw_spin_unlock+0x29/0x40
<4> [491.819117] ? get_partial_node.isra.29+0x1f1/0x460
<4> [491.819134] slab_pad_check.part.11+0xe0/0x160
<4> [491.819291] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.819306] check_slab+0x5c/0xb0
<4> [491.819318] alloc_debug_processing+0x97/0x190
<4> [491.819333] ___slab_alloc.constprop.34+0x355/0x380
<4> [491.819427] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.819444] ? lock_acquire+0xa6/0x1c0
<4> [491.819541] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.819556] ? __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [491.819571] __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [491.819666] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.819680] __kmalloc_track_caller+0x29c/0x2e0
<4> [491.819697] kstrdup+0x28/0x50
<4> [491.819789] i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.819883] i915_driver_load+0x907/0x1550 [i915]
<4> [491.819900] ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [491.819914] ? lockdep_hardirqs_on+0xe0/0x1b0
<4> [491.820005] i915_pci_probe+0x29/0xa0 [i915]
<4> [491.820021] pci_device_probe+0xa1/0x130
<4> [491.820036] really_probe+0xf3/0x3e0
<4> [491.820050] driver_probe_device+0x10a/0x120
<4> [491.820063] __driver_attach+0xdb/0x100
<4> [491.820075] ? driver_probe_device+0x120/0x120
<4> [491.820089] ? driver_probe_device+0x120/0x120
<4> [491.820102] bus_for_each_dev+0x74/0xc0
<4> [491.820116] bus_add_driver+0x15f/0x250
<4> [491.820128] ? 0xffffffffa0974000
<4> [491.820140] driver_register+0x56/0xe0
<4> [491.820152] ? 0xffffffffa0974000
<4> [491.820163] do_one_initcall+0x58/0x2e0
<4> [491.820177] ? do_init_module+0x1d/0x1ea
<4> [491.820190] ? rcu_read_lock_sched_held+0x6f/0x80
<4> [491.820203] ? kmem_cache_alloc_trace+0x264/0x290
<4> [491.820219] do_init_module+0x56/0x1ea
<4> [491.820232] load_module+0x2714/0x29f0
<4> [491.820256] ? __se_sys_finit_module+0xd3/0xf0
<4> [491.820268] __se_sys_finit_module+0xd3/0xf0
<4> [491.820287] do_syscall_64+0x55/0x190
<4> [491.820300] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [491.820314] RIP: 0033:0x7f2b17b62839
<4> [491.820327] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [491.820364] RSP: 002b:00007ffc4d7a24e8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
<4> [491.820383] RAX: ffffffffffffffda RBX: 0000564b16aa6b50 RCX:
00007f2b17b62839
<4> [491.820398] RDX: 0000000000000000 RSI: 0000564b16aab280 RDI:
0000000000000006
<4> [491.820414] RBP: 0000564b16aab280 R08: 0000000000000004 R09:
0000000000000000
<4> [491.820430] R10: 00007ffc4d7a2660 R11: 0000000000000246 R12:
0000000000000000
<4> [491.820445] R13: 0000564b16aa1700 R14: 0000000000000020 R15:
000000000000003f
<3> [491.820469] Padding 00000000ee2a4830: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820490] Padding 00000000576e7a7d: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820511] Padding 0000000068eccb55: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820531] Padding 000000003bb3f0f3: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820551] Padding 000000000fa445d6: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820572] Padding 000000009589c07d: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.820593] FIX kmalloc-16: Restoring
0x00000000ee2a4830-0x000000006d9ceb26=0x5a\x0a
<3> [491.820614]
=============================================================================
<3> [491.820632] BUG kmalloc-16 (Tainted: G BUD ): Redzone
overwritten
<3> [491.820647]
-----------------------------------------------------------------------------\x0a
<3> [491.820670] INFO: 0x00000000d994a43d-0x00000000b6634830. First byte 0x1
instead of 0xbb
<3> [491.820689] INFO: Allocated in 0x701200107012001 age=17942024255977933694
cpu=117514241 pid=117514241
<3> [491.820710] \x090x701200107012001
<3> [491.820719] \x090x701200107012001
<3> [491.820728] \x090x701200107012001
<3> [491.820737] \x090x701200107012001
<3> [491.820747] \x090x701200107012001
<3> [491.820756] \x090x701200107012001
<3> [491.820765] \x090x701200107012001
<3> [491.820774] \x090x701200107012001
<3> [491.820783] \x090x701200107012001
<3> [491.820792] \x090x701200107012001
<3> [491.820801] \x090x701200107012001
<3> [491.820810] \x090x701200107012001
<3> [491.820819] \x090x701200107012001
<3> [491.820828] \x090x701200107012001
<3> [491.820837] \x090x701200107012001
<3> [491.820846] \x090x701200107012001
<3> [491.820857] INFO: Freed in 0x701200107012001 age=17942024255977933694
cpu=117514241 pid=117514241
<3> [491.820876] \x090x701200107012001
<3> [491.820885] \x090x701200107012001
<3> [491.820894] \x090x701200107012001
<3> [491.820902] \x090x701200107012001
<3> [491.820911] \x090x701200107012001
<3> [491.820920] \x090x701200107012001
<3> [491.820929] \x090x701200107012001
<3> [491.820938] \x090x701200107012001
<3> [491.820947] \x090x701200107012001
<3> [491.820956] \x090x701200107012001
<3> [491.820965] \x090x701200107012001
<3> [491.820974] \x090x701200107012001
<3> [491.820982] \x090x701200107012001
<3> [491.820991] \x090x701200107012001
<3> [491.821000] \x090x701200107012001
<3> [491.821009] \x090x701200107012001
<3> [491.821019] INFO: Slab 0x00000000fe774f07 objects=23 used=23 fp=0x
(null) flags=0x10200
<3> [491.821039] INFO: Object 0x00000000edaed870 @offset=3880
fp=0x0000000044883889\x0a
<3> [491.821060] Redzone 00000000d994a43d: 01 20 01 07 01 20 01 07
. ... ..
<3> [491.821080] Object 00000000edaed870: 01 20 01 07 01 20 01 07 01 20 01 07
01 20 01 07 . ... ... ... ..
<3> [491.821103] Redzone 00000000662a40fe: 01 20 01 07 01 20 01 07
. ... ..
<3> [491.821125] Padding 000000008d5fd6ed: 01 20 01 07 01 20 01 07
. ... ..
<4> [491.821146] CPU: 0 PID: 6110 Comm: i915_selftest Tainted: G BUD
4.20.0-rc3-CI-CI_DRM_5159+ #1
<4> [491.821166] Hardware name: Dell Inc. OptiPlex GX280
/0G8310, BIOS A04 02/09/2005
<4> [491.821186] Call Trace:
<4> [491.821197] dump_stack+0x67/0x9b
<4> [491.821210] check_bytes_and_report+0xbd/0x100
<4> [491.821225] check_object+0x184/0x280
<4> [491.821319] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.821333] alloc_debug_processing+0x183/0x190
<4> [491.821348] ___slab_alloc.constprop.34+0x355/0x380
<4> [491.821440] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.821456] ? lock_acquire+0xa6/0x1c0
<4> [491.821548] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.821562] ? __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [491.821577] __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [491.821671] ? i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.821685] __kmalloc_track_caller+0x29c/0x2e0
<4> [491.821701] kstrdup+0x28/0x50
<4> [491.821791] i915_pmu_register+0x17b/0x5c0 [i915]
<4> [491.821884] i915_driver_load+0x907/0x1550 [i915]
<4> [491.821900] ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [491.821915] ? lockdep_hardirqs_on+0xe0/0x1b0
<4> [491.822005] i915_pci_probe+0x29/0xa0 [i915]
<4> [491.822019] pci_device_probe+0xa1/0x130
<4> [491.822033] really_probe+0xf3/0x3e0
<4> [491.822046] driver_probe_device+0x10a/0x120
<4> [491.822060] __driver_attach+0xdb/0x100
<4> [491.822072] ? driver_probe_device+0x120/0x120
<4> [491.822085] ? driver_probe_device+0x120/0x120
<4> [491.822098] bus_for_each_dev+0x74/0xc0
<4> [491.822112] bus_add_driver+0x15f/0x250
<4> [491.822124] ? 0xffffffffa0974000
<4> [491.822135] driver_register+0x56/0xe0
<4> [491.822147] ? 0xffffffffa0974000
<4> [491.822157] do_one_initcall+0x58/0x2e0
<4> [491.822170] ? do_init_module+0x1d/0x1ea
<4> [491.822182] ? rcu_read_lock_sched_held+0x6f/0x80
<4> [491.822195] ? kmem_cache_alloc_trace+0x264/0x290
<4> [491.822211] do_init_module+0x56/0x1ea
<4> [491.822224] load_module+0x2714/0x29f0
<4> [491.822247] ? __se_sys_finit_module+0xd3/0xf0
<4> [491.822260] __se_sys_finit_module+0xd3/0xf0
<4> [491.822278] do_syscall_64+0x55/0x190
<4> [491.822291] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [491.822305] RIP: 0033:0x7f2b17b62839
<4> [491.822315] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [491.822351] RSP: 002b:00007ffc4d7a24e8 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
<4> [491.822370] RAX: ffffffffffffffda RBX: 0000564b16aa6b50 RCX:
00007f2b17b62839
<4> [491.822385] RDX: 0000000000000000 RSI: 0000564b16aab280 RDI:
0000000000000006
<4> [491.822401] RBP: 0000564b16aab280 R08: 0000000000000004 R09:
0000000000000000
<4> [491.822417] R10: 00007ffc4d7a2660 R11: 0000000000000246 R12:
0000000000000000
<4> [491.822432] R13: 0000564b16aa1700 R14: 0000000000000020 R15:
000000000000003f
<3> [491.822456] FIX kmalloc-16: Restoring
0x00000000d994a43d-0x00000000b6634830=0xbb\x0a
<3> [491.822476] FIX kmalloc-16: Marking all objects used</pre>
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