108930 – [CI][BAT] igt@runner@aborted - fail - BUG kmalloc-4k (Tainted: G U ): Poison overwritten after igt@gem_flink_basic@bad-open

Bug 108930 - [CI][BAT] igt@runner@aborted - fail - BUG kmalloc-4k (Tainted: G U ): Poison overwritten after igt@gem_flink_basic@bad-open

Summary: [CI][BAT] igt@runner@aborted - fail - BUG kmalloc-4k (Tainted: G U ...

Status:	RESOLVED NOTOURBUG

Alias:	None

Product:	DRI
Classification:	Unclassified
Component:	DRM/Intel (show other bugs)
Version:	XOrg git
Hardware:	Other All

Importance:	highest normal
Assignee:	Intel GFX Bugs mailing list
QA Contact:	Intel GFX Bugs mailing list

URL:
Whiteboard:	ReadyForDev
Keywords:

Duplicates (1):	110352 (view as bug list)
Depends on:
Blocks:

Reported:	2018-12-03 16:48 UTC by Martin Peres
Modified:	2019-09-19 13:06 UTC (History)
CC List:	1 user (show)

See Also:
i915 platform:	BSW/CHT
i915 features:	power/suspend-resume

Attachments
Dmesg logs (147.27 KB, text/x-log) 2018-12-03 16:50 UTC, Martin Peres	no flags	Details
View All

Description Martin Peres 2018-12-03 16:48:10 UTC

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5186_70/fi-bsw-kefka/igt%40runner%40aborted.html

Aborting.
Previous test: gem_flink_basic (bad-open)
Next test: gem_flink_basic (basic)

Kernel tainted (0x60 -- 20)

<3>[  161.275655] =============================================================================
<3>[  161.275662] BUG kmalloc-4k (Tainted: G     U           ): Poison overwritten
<3>[  161.275665] -----------------------------------------------------------------------------

<4>[  161.275668] Disabling lock debugging due to kernel taint
<3>[  161.275673] INFO: 0x00000000ffc016ce-0x0000000029190cf1. First byte 0x56 instead of 0x6b
<3>[  161.275682] INFO: Allocated in __alloc_skb+0x72/0x1b0 age=3325 cpu=0 pid=2310
<3>[  161.275687] 	__kmalloc_track_caller+0x29c/0x2e0
<3>[  161.275690] 	__kmalloc_reserve.isra.9+0x24/0x70
<3>[  161.275693] 	__alloc_skb+0x72/0x1b0
<3>[  161.275695] 	__netdev_alloc_skb+0x35/0x110
<3>[  161.275703] 	rx_submit+0x3d/0x2e0 [usbnet]
<3>[  161.275707] 	rx_alloc_submit+0x3b/0x60 [usbnet]
<3>[  161.275710] 	usbnet_resume+0x246/0x24b [usbnet]
<3>[  161.275715] 	usb_resume_interface.isra.1+0x8c/0xf0
<3>[  161.275717] 	usb_resume_both+0xe1/0x130
<3>[  161.275720] 	usb_resume+0x11/0x60
<3>[  161.275723] 	dpm_run_callback+0x64/0x280
<3>[  161.275726] 	device_resume+0xb3/0x1e0
<3>[  161.275728] 	async_resume+0x14/0x40
<3>[  161.275731] 	async_run_entry_fn+0x34/0x160
<3>[  161.275734] 	process_one_work+0x262/0x630
<3>[  161.275736] 	worker_thread+0x37/0x380
<3>[  161.275740] INFO: Freed in consume_skb+0x3d/0x120 age=3243 cpu=1 pid=287
<3>[  161.275744] 	usbnet_bh+0xb9/0x2b0 [usbnet]
<3>[  161.275747] 	tasklet_action_common.isra.4+0x47/0xb0
<3>[  161.275750] 	__do_softirq+0xd8/0x4b9
<3>[  161.275752] 	irq_exit+0xa9/0xc0
<3>[  161.275754] 	do_IRQ+0x9a/0x130
<3>[  161.275756] 	ret_from_intr+0x0/0x1d
<3>[  161.275759] 	_raw_spin_unlock_irqrestore+0x4e/0x60
<3>[  161.275761] 	usb_hcd_unlink_urb+0x60/0xf0
<3>[  161.275765] 	unlink_urbs.isra.5+0x88/0xd0 [usbnet]
<3>[  161.275768] 	__handle_link_change.part.7+0x52/0x60 [usbnet]
<3>[  161.275772] 	usbnet_deferred_kevent+0x2bd/0x370 [usbnet]
<3>[  161.275774] 	process_one_work+0x262/0x630
<3>[  161.275776] 	worker_thread+0x37/0x380
<3>[  161.275779] 	kthread+0x119/0x130
<3>[  161.275781] 	ret_from_fork+0x3a/0x50
<3>[  161.275784] INFO: Slab 0x00000000d59c1dca objects=7 used=7 fp=0x          (null) flags=0x8000000000010200
<3>[  161.275786] INFO: Object 0x00000000579237e1 @offset=22168 fp=0x          (null)

<3>[  161.275790] Redzone 000000009457227f: bb bb bb bb bb bb bb bb                          ........
<3>[  161.275792] Object 00000000579237e1: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275794] Object 00000000bab83756: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275795] Object 0000000088930b2c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275797] Object 00000000a768ace0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275799] Object 00000000ffc016ce: 56 01 a9 fe 00 50 b6 ca 22 31 68 05 ca 2f 15 dd  V....P.."1h../..
<3>[  161.275801] Object 000000001540fd0a: 08 00 45 10 01 48 00 00 00 00 80 11 b6 15 c0 a8  ..E..H..........
<3>[  161.275803] Object 00000000fd8d8829: 01 01 c0 a8 01 2e 00 43 00 44 01 34 7a 1c 02 01  .......C.D.4z...
<3>[  161.275805] Object 00000000e50136d1: 06 00 7d 17 b3 67 00 00 00 00 00 00 00 00 c0 a8  ..}..g..........
<3>[  161.275807] Object 00000000009ae7d4: 01 2e 00 00 00 00 00 00 00 00 00 50 b6 ca 22 31  ...........P.."1
<3>[  161.275809] Object 000000006c041d46: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275810] Object 0000000041da0e5a: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275812] Object 0000000045c74742: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275814] Object 000000006fe4dc4d: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275816] Object 00000000123c9c34: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275818] Object 000000002b77b95c: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275820] Object 00000000cdf7c1bc: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275821] Object 00000000d434b83a: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275823] Object 00000000abf24680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275825] Object 000000008921c484: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275827] Object 0000000032a581f5: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275829] Object 00000000458585ac: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3>[  161.275831] Object 000000002db85c08: 00 00 00 00 00 00 00 00 00 00 63 82 53 63 35 01  ..........c.Sc5.
<3>[  161.275833] Object 0000000031bc2a41: 05 36 04 c0 a8 01 01 33 04 00 00 0e 10 01 04 ff  .6.....3........
<3>[  161.275834] Object 000000000b324c48: ff ff 00 03 04 c0 a8 01 01 0f 0c 66 69 2e 69 6e  ...........fi.in
<3>[  161.275836] Object 0000000008db29d1: 74 65 6c 2e 63 6f 6d 06 0c 0a f8 02 01 a3 21 fd  tel.com.......!.
<3>[  161.275838] Object 00000000db70f744: 4c 0a b8 09 09 ff 00 00 00 00 6b 6b 6b 6b 6b 6b  L.........kkkkkk
<3>[  161.275840] Object 00000000d32ce784: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275842] Object 00000000fc385f2d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275844] Object 0000000038f0deca: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275846] Object 000000003dcc414a: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275847] Object 0000000085f190cb: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275849] Object 0000000059dd6ebe: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275851] Object 000000000d43a2f4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275853] Object 000000009960c6e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275855] Object 000000008602acae: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275857] Object 000000009940ea34: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275858] Object 00000000d30274aa: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275860] Object 000000003baba94e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275862] Object 00000000e39f1ada: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275864] Object 000000009aa13e70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275866] Object 0000000000ea75ae: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275868] Object 00000000f97fe5e2: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275869] Object 000000008693c53d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275871] Object 00000000c746010b: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275873] Object 00000000556f7d27: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275875] Object 00000000fe9729bf: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275877] Object 0000000090fc1941: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275879] Object 0000000024a8b8d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275880] Object 000000007dcecaea: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275882] Object 00000000a5d63fa0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275884] Object 0000000060fd4830: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275886] Object 0000000071d449bb: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275888] Object 00000000d1399de3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275890] Object 000000008fe57e0d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275892] Object 000000003e56c1c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275893] Object 00000000c62d5402: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275895] Object 00000000c261e5f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275897] Object 0000000066980a9c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275899] Object 0000000027ca8d28: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275901] Object 00000000764a4f7d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275903] Object 0000000082911fb5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275904] Object 000000009e9292a7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275906] Object 00000000454a7ea7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275908] Object 00000000530a41ce: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275910] Object 00000000427cd363: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275912] Object 000000007f56b8e5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275914] Object 00000000543612f7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275915] Object 000000006bbd05e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275917] Object 00000000f25bb1da: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275919] Object 00000000b3b44c8f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275921] Object 00000000c47d6261: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275923] Object 00000000154a081e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275925] Object 0000000003aad8d7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275926] Object 00000000de5f0179: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275928] Object 000000003004ac4d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275930] Object 000000008642926d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275932] Object 00000000b4e4cb9f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275934] Object 00000000ec3f2b7a: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275936] Object 00000000cb76d894: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275937] Object 000000006e3e41a2: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275939] Object 0000000007fd8f45: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275941] Object 000000007b420a55: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275943] Object 00000000051b8ff5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275945] Object 00000000238490e5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3>[  161.275948] Object 00000000317db216: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275950] Object 00000000d2a1b198: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275952] Object 00000000cf56a9be: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275954] Object 000000005b08c554: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275956] Object 00000000d762d9d5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275958] Object 00000000aa86e819: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275960] Object 00000000465602dd: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275961] Object 0000000003279374: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275963] Object 000000004677c00c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275965] Object 000000001e5de356: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275967] Object 000000004f4e929e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275969] Object 000000002936a6e4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275971] Object 00000000b5340dc4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275972] Object 00000000862a44db: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275974] Object 00000000f2c69b97: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275976] Object 00000000461f60d9: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275978] Object 0000000065bbcfdb: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275980] Object 00000000689e502d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275982] Object 00000000e135f730: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275983] Object 0000000005b07db3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275985] Object 000000001c04010c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275987] Object 000000000cc9f8b9: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275989] Object 0000000082540ae6: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275991] Object 00000000c6c77017: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.275993] Object 000000000af385ca: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3>[  161.276239] Object 00000000c128be91: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276241] Object 000000000b090ad8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276243] Object 00000000b1a814de: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276245] Object 00000000a42d036d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276247] Object 00000000dcf9edf0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276248] Object 0000000087d41867: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276250] Object 00000000972351a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276252] Object 000000005ba2640b: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276254] Object 00000000b034f0ea: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276256] Object 00000000d6cb9cad: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276258] Object 0000000035ca12d3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276259] Object 000000006979fbb8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3>[  161.276261] Object 000000000878057e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
<3>[  161.276263] Redzone 00000000494c651c: bb bb bb bb bb bb bb bb                          ........
<3>[  161.276265] Padding 00000000c30f7324: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
<4>[  161.276269] CPU: 0 PID: 2353 Comm: gem_flink_basic Tainted: G    BU            4.20.0-rc3-g890ed44fe261-repeat_15+ #1
<4>[  161.276271] Hardware name: GOOGLE Kefka/Kefka, BIOS MrChromebox 02/04/2018
<4>[  161.276273] Call Trace:
<4>[  161.276280]  dump_stack+0x67/0x9b
<4>[  161.276285]  check_bytes_and_report+0xbd/0x100
<4>[  161.276290]  check_object+0x22a/0x270
<4>[  161.276295]  ? vc_do_resize+0xca/0x640
<4>[  161.276298]  alloc_debug_processing+0x17a/0x190
<4>[  161.276303]  ___slab_alloc.constprop.34+0x355/0x380
<4>[  161.276305]  ? vc_do_resize+0xca/0x640
<4>[  161.276312]  ? vc_do_resize+0xca/0x640
<4>[  161.276315]  ? vc_do_resize+0xca/0x640
<4>[  161.276317]  ? __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4>[  161.276320]  __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4>[  161.276324]  __kmalloc+0x29f/0x2e0
<4>[  161.276329]  vc_do_resize+0xca/0x640
<4>[  161.276336]  ? visual_init+0x75/0x120
<4>[  161.276341]  visual_init+0xc9/0x120
<4>[  161.276344]  do_bind_con_driver+0x1f2/0x410
<4>[  161.276351]  do_unbind_con_driver+0x141/0x240
<4>[  161.276358]  store_bind+0xad/0x1a0
<4>[  161.276364]  kernfs_fop_write+0x104/0x190
<4>[  161.276369]  __vfs_write+0x31/0x180
<4>[  161.276374]  ? rcu_read_lock_sched_held+0x6f/0x80
<4>[  161.276377]  ? rcu_sync_lockdep_assert+0x29/0x50
<4>[  161.276380]  ? __sb_start_write+0x152/0x1f0
<4>[  161.276382]  ? __sb_start_write+0x163/0x1f0
<4>[  161.276387]  vfs_write+0xbd/0x1b0
<4>[  161.276391]  ksys_write+0x50/0xc0
<4>[  161.276397]  do_syscall_64+0x55/0x190
<4>[  161.276400]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4>[  161.276403] RIP: 0033:0x7f07d1d72281
<4>[  161.276406] Code: c3 0f 1f 84 00 00 00 00 00 48 8b 05 59 8d 20 00 c3 0f 1f 84 00 00 00 00 00 8b 05 8a d1 20 00 85 c0 75 16 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 41 54 55 49 89 d4 53
<4>[  161.276408] RSP: 002b:00007ffc2723fe38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
<4>[  161.276411] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f07d1d72281
<4>[  161.276412] RDX: 0000000000000002 RSI: 00007f07d1fdc202 RDI: 0000000000000006
<4>[  161.276414] RBP: 00007ffc27240e80 R08: 0000556251ae7cf3 R09: 0000000000000006
<4>[  161.276416] R10: 0000000000000000 R11: 0000000000000246 R12: 00005562518bab50
<4>[  161.276417] R13: 00007ffc272410a0 R14: 0000000000000000 R15: 0000000000000000
<3>[  161.276427] FIX kmalloc-4k: Restoring 0x00000000ffc016ce-0x0000000029190cf1=0x6b

<3>[  161.276429] FIX kmalloc-4k: Marking all objects used

Comment 1 Martin Peres 2018-12-03 16:50:42 UTC

Created attachment 142703 [details]
Dmesg logs

Comment 2 Chris Wilson 2018-12-03 17:01:47 UTC

That does look like a skb packet created after it was freed. Suspicion does first fall on usbnet.

Comment 3 Francesco Balestrieri 2019-01-08 13:29:32 UTC

One single occurrence. Closing.

Comment 4 CI Bug Log 2019-01-09 17:43:59 UTC

The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* BSW: igt@gem_exec_suspend@basic-s4-devices - dmesg-warn - Poison overwritten
  - https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5378/fi-bsw-kefka/igt@gem_exec_suspend@basic-s4-devices.html

Comment 5 Chris Wilson 2019-01-11 18:59:18 UTC

(In reply to CI Bug Log from comment #4)
> The CI Bug Log issue associated to this bug has been updated.
> 
> ### New filters associated
> 
> * BSW: igt@gem_exec_suspend@basic-s4-devices - dmesg-warn - Poison
> overwritten
>   -
> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_5378/fi-bsw-kefka/
> igt@gem_exec_suspend@basic-s4-devices.html

You should have quoted that report, it is quite revealing.

<3> [144.802226] =============================================================================
<3> [144.802284] BUG drm_i915_gem_object (Tainted: G     U           ): Poison overwritten
<3> [144.802328] -----------------------------------------------------------------------------

<4> [144.802380] Disabling lock debugging due to kernel taint
<3> [144.802384] INFO: 0x000000009be72ef2-0x000000003b2c63f1. First byte 0x56 instead of 0x6b
<3> [144.802504] INFO: Allocated in i915_gem_object_create.part.33+0x26/0x210 [i915] age=128 cpu=0 pid=2338
<3> [144.802532] 	kmem_cache_alloc+0x21c/0x280
<3> [144.802614] 	i915_gem_object_create.part.33+0x26/0x210 [i915]
<3> [144.802698] 	i915_gem_create+0x64/0xc0 [i915]
<3> [144.802714] 	drm_ioctl_kernel+0x81/0xf0
<3> [144.802726] 	drm_ioctl+0x2f3/0x3b0
<3> [144.802738] 	do_vfs_ioctl+0xa0/0x6e0
<3> [144.802749] 	ksys_ioctl+0x35/0x60
<3> [144.802760] 	__x64_sys_ioctl+0x11/0x20
<3> [144.802773] 	do_syscall_64+0x55/0x190
<3> [144.802787] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [144.802871] INFO: Freed in __i915_gem_free_objects+0x3f3/0x720 [i915] age=124 cpu=0 pid=2338
<3> [144.802961] 	__i915_gem_free_objects+0x3f3/0x720 [i915]
<3> [144.803045] 	i915_gem_create_ioctl+0x75/0x80 [i915]
<3> [144.803059] 	drm_ioctl_kernel+0x81/0xf0
<3> [144.803071] 	drm_ioctl+0x2f3/0x3b0
<3> [144.803083] 	do_vfs_ioctl+0xa0/0x6e0
<3> [144.803094] 	ksys_ioctl+0x35/0x60
<3> [144.803105] 	__x64_sys_ioctl+0x11/0x20
<3> [144.803117] 	do_syscall_64+0x55/0x190
<3> [144.803129] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [144.803144] INFO: Slab 0x000000002520201e objects=20 used=20 fp=0x          (null) flags=0x8000000000010200
<3> [144.803168] INFO: Object 0x00000000cbbed793 @offset=64 fp=0x0000000070f88982

<3> [144.803191] Redzone 000000009eded464: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [144.803215] Redzone 0000000036cd78df: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [144.803238] Redzone 0000000099980aeb: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [144.803260] Redzone 000000005f66abb7: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
<3> [144.803283] Object 00000000cbbed793: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803306] Object 0000000046587375: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803329] Object 000000009bd0a43f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803352] Object 000000009d449fa7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803374] Object 000000007bd073a5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803397] Object 0000000025cc8ff6: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803420] Object 00000000e1c61883: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803443] Object 00000000ee0dbbdd: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803465] Object 00000000b40db93e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803488] Object 00000000fe35f8c3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803511] Object 0000000032774172: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803533] Object 00000000fb5da270: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803556] Object 00000000c7c39b91: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803579] Object 00000000292693c4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803601] Object 00000000016fd1d6: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803624] Object 00000000c958d430: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803647] Object 000000000be2847c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803669] Object 00000000c8886479: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803692] Object 00000000debc851e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803715] Object 00000000761bfed3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803738] Object 0000000039f913e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803760] Object 00000000b5f39823: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803783] Object 000000007ee3019b: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803806] Object 00000000d564258c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.803828] Object 000000009be72ef2: 56 01 a9 fe ff ff ff ff ff ff 90 49 fa 02 b0 5f  V..........I..._
<3> [144.803851] Object 00000000618391a0: 08 00 45 10 01 48 00 00 00 00 80 11 39 96 00 00  ..E..H......9...
<3> [144.803874] Object 00000000904bc189: 00 00 ff ff ff ff 00 44 00 43 01 34 8b d2 01 01  .......D.C.4....
<3> [144.803897] Object 00000000b8bf1b7f: 06 00 ed ad 34 68 00 03 00 00 00 00 00 00 00 00  ....4h..........
<3> [144.803919] Object 0000000064b8f0d2: 00 00 00 00 00 00 00 00 00 00 90 49 fa 02 b0 5f  ...........I..._
<3> [144.803942] Object 00000000174d9dad: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.803965] Object 000000004a1bad07: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.803987] Object 0000000070b03f0d: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804010] Object 00000000d5b4fc65: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804033] Object 00000000ff5ed598: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804055] Object 000000003d951f20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804078] Object 00000000eaca5eef: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804101] Object 00000000be680658: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804124] Object 000000000e7fbf2b: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804146] Object 00000000b093cac8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804169] Object 000000000509a6a1: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804192] Object 00000000e509b017: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [144.804214] Object 0000000041d7f45b: 00 00 00 00 00 00 00 00 00 00 63 82 53 63 35 01  ..........c.Sc5.
<3> [144.804237] Object 00000000b87375ad: 03 32 04 c0 a8 01 0a 0c 07 67 6c 6b 2d 64 73 69  .2.......glk-dsi
<3> [144.804260] Object 000000009ea5e15a: 37 10 01 1c 02 03 0f 06 77 0c 2c 2f 1a 79 2a f9  7.......w.,/.y*.
<3> [144.804282] Object 00000000a8a32f51: 21 fc ff 00 00 00 00 00 00 00 00 00 00 00 00 00  !...............
<3> [144.804305] Object 00000000c10a825d: 00 00 00 00 00 00 00 00 00 00 6b 6b 6b 6b 6b 6b  ..........kkkkkk
<3> [144.804328] Object 00000000ce4acdc9: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804351] Object 00000000eae9b5aa: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804373] Object 000000004c50a015: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804396] Object 00000000a0092720: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804419] Object 0000000053a3aac8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804441] Object 000000001eecc9d5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804464] Object 00000000b996616b: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804487] Object 00000000757bfbc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804509] Object 000000004d99c552: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804532] Object 00000000c89fc843: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804555] Object 00000000f235748d: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804578] Object 00000000542995a2: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804600] Object 000000006b41e8f4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804623] Object 00000000a26cb611: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804646] Object 000000000f541a10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804668] Object 000000000cd69fe5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804691] Object 000000002429b1f5: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804714] Object 00000000a7954a3c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804736] Object 00000000ab10882a: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804759] Object 00000000a6544ada: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804782] Object 00000000b1f8f83a: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804805] Object 0000000059124ac9: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804827] Object 00000000fa21b721: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804850] Object 00000000a78ef152: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804873] Object 000000006d9bb674: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804895] Object 000000008ed3c15e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [144.804918] Object 00000000ecf85cb7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
<3> [144.804941] Redzone 00000000400ac936: bb bb bb bb bb bb bb bb                          ........
<3> [144.804963] Padding 0000000057f8ef7d: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [144.804986] Padding 000000004eec6f3f: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<3> [144.805008] Padding 000000008f3c1691: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
<4> [144.805034] CPU: 0 PID: 2338 Comm: gem_exec_suspen Tainted: G    BU            5.0.0-rc1-CI-CI_DRM_5378+ #1
<4> [144.805036] Hardware name: GOOGLE Kefka/Kefka, BIOS MrChromebox 02/04/2018
<4> [144.805038] Call Trace:
<4> [144.805046]  dump_stack+0x67/0x9b
<4> [144.805052]  check_bytes_and_report+0xbd/0x100
<4> [144.805058]  check_object+0x237/0x280
<4> [144.805133]  ? i915_gem_object_create.part.33+0x26/0x210 [i915]
<4> [144.805137]  alloc_debug_processing+0x183/0x190
<4> [144.805143]  ___slab_alloc.constprop.34+0x355/0x380
<4> [144.805215]  ? i915_gem_object_create.part.33+0x26/0x210 [i915]
<4> [144.805222]  ? lock_acquire+0xa6/0x1c0
<4> [144.805296]  ? i915_gem_object_create.part.33+0x26/0x210 [i915]
<4> [144.805301]  ? __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [144.805304]  __slab_alloc.isra.27.constprop.33+0x3d/0x70
<4> [144.805378]  ? i915_gem_object_create.part.33+0x26/0x210 [i915]
<4> [144.805382]  kmem_cache_alloc+0x21c/0x280
<4> [144.805455]  ? i915_gem_dumb_create+0x30/0x30 [i915]
<4> [144.805528]  i915_gem_object_create.part.33+0x26/0x210 [i915]
<4> [144.805603]  i915_gem_create+0x64/0xc0 [i915]
<4> [144.805609]  drm_ioctl_kernel+0x81/0xf0
<4> [144.805615]  drm_ioctl+0x2f3/0x3b0
<4> [144.805689]  ? i915_gem_dumb_create+0x30/0x30 [i915]
<4> [144.805697]  ? _raw_spin_unlock_irqrestore+0x39/0x60
<4> [144.805704]  do_vfs_ioctl+0xa0/0x6e0
<4> [144.805708]  ? task_work_run+0x6e/0xb0
<4> [144.805712]  ? lockdep_hardirqs_on+0xe0/0x1b0
<4> [144.805715]  ? _raw_spin_unlock_irq+0x24/0x50
<4> [144.805721]  ksys_ioctl+0x35/0x60
<4> [144.805727]  __x64_sys_ioctl+0x11/0x20
<4> [144.805730]  do_syscall_64+0x55/0x190
<4> [144.805734]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [144.805737] RIP: 0033:0x7f506dbf05d7
<4> [144.805741] Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48
<4> [144.805744] RSP: 002b:00007ffec5fc0798 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
<4> [144.805748] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f506dbf05d7
<4> [144.805750] RDX: 00007ffec5fc0800 RSI: 00000000c010645b RDI: 0000000000000005
<4> [144.805752] RBP: 00007ffec5fc0800 R08: 00007f506dec51c8 R09: 00007f506dec5240
<4> [144.805754] R10: 00000000ffffffc6 R11: 0000000000000246 R12: 00000000c010645b
<4> [144.805756] R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000000
<3> [144.805767] FIX drm_i915_gem_object: Restoring 0x000000009be72ef2-0x000000003b2c63f1=0x6b

Comment 6 Chris Wilson 2019-01-11 19:01:16 UTC

Fwiw, it's a nasty bug (stray write) that could cause a lot of hard to diagnose issues in any test. It's definitely a use-after-free of some skb/pkt, so reporting to netdev?

Comment 7 Francesco Balestrieri 2019-04-11 07:57:15 UTC

*** Bug 110352 has been marked as a duplicate of this bug. ***

Comment 8 CI Bug Log 2019-08-23 08:10:25 UTC

A CI Bug Log filter associated to this bug has been updated:

{- BSW: igt@runner@aborted - fail - Previous test: gem_flink_basic \(bad-open\) -}
{+ BSW: igt@runner@aborted - fail - Previous test: gem_flink_basic +}

New failures caught by the filter:

  * https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6761/fi-bsw-kefka/igt@runner@aborted.html

Comment 9 Martin Peres 2019-08-23 08:12:00 UTC

It happened again, on the same test: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6761/fi-bsw-kefka/igt@gem_flink_basic@bad-flink.html

<3> [115.741875] =============================================================================
<3> [115.742788] BUG kmalloc-4k (Tainted: G     U           ): Poison overwritten
<3> [115.742900] -----------------------------------------------------------------------------

<4> [115.743041] Disabling lock debugging due to kernel taint
<3> [115.743047] INFO: 0x00000000e0c9f1d9-0x0000000062ba1a19. First byte 0x56 instead of 0x6b
<3> [115.743142] INFO: Allocated in kernfs_iop_get_link+0x3b/0x1d0 age=2791 cpu=1 pid=2273
<3> [115.743229] 	__slab_alloc.isra.28.constprop.33+0x3d/0x70
<3> [115.743288] 	kmem_cache_alloc_trace+0x295/0x300
<3> [115.743340] 	kernfs_iop_get_link+0x3b/0x1d0
<3> [115.743389] 	vfs_readlink+0x60/0x110
<3> [115.743432] 	do_readlinkat+0xa7/0x110
<3> [115.743476] 	__x64_sys_readlinkat+0x15/0x20
<3> [115.743524] 	do_syscall_64+0x55/0x1c0
<3> [115.743568] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [115.743625] INFO: Freed in vfs_readlink+0x8e/0x110 age=2791 cpu=1 pid=2273
<3> [115.743699] 	vfs_readlink+0x8e/0x110
<3> [115.743741] 	do_readlinkat+0xa7/0x110
<3> [115.743785] 	__x64_sys_readlinkat+0x15/0x20
<3> [115.743832] 	do_syscall_64+0x55/0x1c0
<3> [115.743876] 	entry_SYSCALL_64_after_hwframe+0x49/0xbe
<3> [115.743933] INFO: Slab 0x00000000db7c62d1 objects=7 used=7 fp=0x00000000072b2163 flags=0x8000000000010200
<3> [115.744033] INFO: Object 0x000000006219221b @offset=8 fp=0x00000000072b2163

<3> [115.744123] Redzone 00000000: bb bb bb bb bb bb bb bb                          ........
<3> [115.744208] Object 00000000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.744297] Object 00000010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.744384] Object 00000020: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.744471] Object 00000030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.744562] Object 00000040: 56 01 a9 fe 00 50 b6 ca 22 31 68 05 ca 2f 15 dd  V....P.."1h../..
<3> [115.744652] Object 00000050: 08 00 45 10 01 48 00 00 00 00 80 11 b6 15 c0 a8  ..E..H..........
<3> [115.744742] Object 00000060: 01 01 c0 a8 01 2e 00 43 00 44 01 34 97 a5 02 01  .......C.D.4....
<3> [115.744833] Object 00000070: 06 00 28 de ea 17 00 00 00 00 00 00 00 00 c0 a8  ..(.............
<3> [115.744923] Object 00000080: 01 2e 00 00 00 00 00 00 00 00 00 50 b6 ca 22 31  ...........P.."1
<3> [115.745014] Object 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745104] Object 000000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745195] Object 000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745284] Object 000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745374] Object 000000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745465] Object 000000e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745555] Object 000000f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745646] Object 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745736] Object 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.745827] Object 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.747466] Object 00000130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.749085] Object 00000140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
<3> [115.750682] Object 00000150: 00 00 00 00 00 00 00 00 00 00 63 82 53 63 35 01  ..........c.Sc5.
<3> [115.752245] Object 00000160: 05 36 04 c0 a8 01 01 33 04 00 00 0e 10 01 04 ff  .6.....3........
<3> [115.753797] Object 00000170: ff ff 00 03 04 c0 a8 01 01 0f 0c 66 69 2e 69 6e  ...........fi.in
<3> [115.755330] Object 00000180: 74 65 6c 2e 63 6f 6d 06 0c 0a f8 02 01 a3 21 fd  tel.com.......!.
<3> [115.756858] Object 00000190: 4c 0a b8 09 09 ff 00 00 00 00 6b 6b 6b 6b 6b 6b  L.........kkkkkk
<3> [115.758379] Object 000001a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.759880] Object 000001b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.761332] Object 000001c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.762735] Object 000001d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.764092] Object 000001e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.765420] Object 000001f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.766730] Object 00000200: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.768019] Object 00000210: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.769290] Object 00000220: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.770544] Object 00000230: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.771783] Object 00000240: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.772994] Object 00000250: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.774165] Object 00000260: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.775299] Object 00000270: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.776415] Object 00000280: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.777515] Object 00000290: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.778594] Object 000002a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.779647] Object 000002b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.780641] Object 000002c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.781583] Object 000002d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.782486] Object 000002e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.783354] Object 000002f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.784172] Object 00000300: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.784991] Object 00000310: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.785812] Object 00000320: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.786629] Object 00000330: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.787401] Object 00000340: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.788135] Object 00000350: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.788832] Object 00000360: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.789493] Object 00000370: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.790129] Object 00000380: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.790746] Object 00000390: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.791364] Object 000003a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.791983] Object 000003b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.792601] Object 000003c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.793224] Object 000003d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.793848] Object 000003e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.794473] Object 000003f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.795096] Object 00000400: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.795722] Object 00000410: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.796346] Object 00000420: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.796970] Object 00000430: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.797594] Object 00000440: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.798202] Object 00000450: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.798769] Object 00000460: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.799300] Object 00000470: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.799782] Object 00000480: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.800221] Object 00000490: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.800634] Object 000004a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.801045] Object 000004b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.801455] Object 000004c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.801865] Object 000004d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.802273] Object 000004e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.802680] Object 000004f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.803086] Object 00000500: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.803493] Object 00000510: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.803900] Object 00000520: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.804305] Object 00000530: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.804711] Object 00000540: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.805116] Object 00000550: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.805521] Object 00000560: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.805926] Object 00000570: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.806328] Object 00000580: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.806734] Object 00000590: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.807139] Object 000005a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.807542] Object 000005b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.807946] Object 000005c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.808348] Object 000005d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.808749] Object 000005e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.809151] Object 000005f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.809553] Object 00000600: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.809955] Object 00000610: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.810355] Object 00000620: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.810756] Object 00000630: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.811156] Object 00000640: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.811553] Object 00000650: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.811952] Object 00000660: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.812351] Object 00000670: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.812748] Object 00000680: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.813146] Object 00000690: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.813544] Object 000006a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.813942] Object 000006b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.814340] Object 000006c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.814737] Object 000006d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.815134] Object 000006e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.815529] Object 000006f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.815925] Object 00000700: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.816322] Object 00000710: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.816719] Object 00000720: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.817118] Object 00000730: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.817514] Object 00000740: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.817913] Object 00000750: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.818308] Object 00000760: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.818706] Object 00000770: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.819100] Object 00000780: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.819498] Object 00000790: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.819893] Object 000007a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.820287] Object 000007b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.820684] Object 000007c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.821082] Object 000007d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.821480] Object 000007e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.821879] Object 000007f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.822275] Object 00000800: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.822673] Object 00000810: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.823070] Object 00000820: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.823468] Object 00000830: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.823866] Object 00000840: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.824263] Object 00000850: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.824662] Object 00000860: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.825061] Object 00000870: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.825461] Object 00000880: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.825856] Object 00000890: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.826250] Object 000008a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.826648] Object 000008b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.827046] Object 000008c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.827443] Object 000008d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.827841] Object 000008e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.828237] Object 000008f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.828633] Object 00000900: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.829030] Object 00000910: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.829429] Object 00000920: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.829827] Object 00000930: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.830225] Object 00000940: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.830626] Object 00000950: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.831025] Object 00000960: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.831425] Object 00000970: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.831824] Object 00000980: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.832220] Object 00000990: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.832619] Object 000009a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.833020] Object 000009b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.833419] Object 000009c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.833817] Object 000009d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.834214] Object 000009e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.834614] Object 000009f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.835010] Object 00000a00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.835408] Object 00000a10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.835803] Object 00000a20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.836199] Object 00000a30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.836594] Object 00000a40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.836990] Object 00000a50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.837385] Object 00000a60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.837781] Object 00000a70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.838175] Object 00000a80: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.838573] Object 00000a90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.838969] Object 00000aa0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.839365] Object 00000ab0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.839760] Object 00000ac0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.840156] Object 00000ad0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.840550] Object 00000ae0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.840947] Object 00000af0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.841342] Object 00000b00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.841738] Object 00000b10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.842133] Object 00000b20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.842529] Object 00000b30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.842926] Object 00000b40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.843321] Object 00000b50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.843717] Object 00000b60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.844113] Object 00000b70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.844511] Object 00000b80: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.844908] Object 00000b90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.845304] Object 00000ba0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.845701] Object 00000bb0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.846098] Object 00000bc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.846495] Object 00000bd0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.846892] Object 00000be0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.847288] Object 00000bf0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.847684] Object 00000c00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.848079] Object 00000c10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.848476] Object 00000c20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.848873] Object 00000c30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.849269] Object 00000c40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.849665] Object 00000c50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.850061] Object 00000c60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.850459] Object 00000c70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.850856] Object 00000c80: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.851253] Object 00000c90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.851651] Object 00000ca0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.852048] Object 00000cb0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.852445] Object 00000cc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.852843] Object 00000cd0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.853239] Object 00000ce0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.853639] Object 00000cf0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.854033] Object 00000d00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.854431] Object 00000d10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.854829] Object 00000d20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.855226] Object 00000d30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.855625] Object 00000d40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.856022] Object 00000d50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.856420] Object 00000d60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.856817] Object 00000d70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.857215] Object 00000d80: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.857614] Object 00000d90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.858011] Object 00000da0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3> [115.858809] Object 00000dc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.859205] Object 00000dd0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3> [115.860002] Object 00000df0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.860399] Object 00000e00: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.860798] Object 00000e10: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.861196] Object 00000e20: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.861595] Object 00000e30: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.861994] Object 00000e40: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.862392] Object 00000e50: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.862792] Object 00000e60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.863189] Object 00000e70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3> [115.863981] Object 00000e90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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<3> [115.869129] Object 00000f60: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.869525] Object 00000f70: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.869920] Object 00000f80: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.870314] Object 00000f90: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.870710] Object 00000fa0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.871106] Object 00000fb0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.871502] Object 00000fc0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.871899] Object 00000fd0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.872295] Object 00000fe0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
<3> [115.872693] Object 00000ff0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
<3> [115.873093] Redzone 00000000: bb bb bb bb bb bb bb bb                          ........
<3> [115.873543] Padding 00000000: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
<4> [115.874022] CPU: 1 PID: 2279 Comm: gem_flink_basic Tainted: G    BU            5.3.0-rc5-CI-CI_DRM_6761+ #1
<4> [115.874024] Hardware name: GOOGLE Kefka/Kefka, BIOS MrChromebox 02/04/2018
<4> [115.874027] Call Trace:
<4> [115.874037]  dump_stack+0x67/0x9b
<4> [115.874043]  check_bytes_and_report+0xbd/0x100
<4> [115.874050]  check_object+0x237/0x280
<4> [115.874057]  ? seq_read+0x322/0x3c0
<4> [115.874061]  alloc_debug_processing+0x183/0x190
<4> [115.874067]  ___slab_alloc.constprop.34+0x355/0x380
<4> [115.874070]  ? seq_read+0x322/0x3c0
<4> [115.874080]  ? seq_read+0x322/0x3c0
<4> [115.874083]  ? seq_read+0x322/0x3c0
<4> [115.874087]  ? __slab_alloc.isra.28.constprop.33+0x3d/0x70
<4> [115.874091]  __slab_alloc.isra.28.constprop.33+0x3d/0x70
<4> [115.874096]  __kmalloc+0x318/0x350
<4> [115.874103]  seq_read+0x322/0x3c0
<4> [115.874109]  ? do_sys_open+0x13b/0x250
<4> [115.874115]  vfs_read+0x9e/0x160
<4> [115.874121]  ksys_read+0x8f/0xe0
<4> [115.874128]  do_syscall_64+0x55/0x1c0
<4> [115.874133]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [115.874138] RIP: 0033:0x7f729d806114
<4> [115.874142] Code: 89 02 48 c7 c0 ff ff ff ff c3 48 8b 15 6d ad 2d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 04 f3 c3 66 90 48 8b 15 41 ad 2d 00 f7 d8 64
<4> [115.874145] RSP: 002b:00007ffe8daf4ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
<4> [115.874148] RAX: ffffffffffffffda RBX: 00007ffe8daf6f98 RCX: 00007f729d806114
<4> [115.874150] RDX: 0000000000002000 RSI: 00007ffe8daf4f50 RDI: 0000000000000005
<4> [115.874153] RBP: 0000000000000000 R08: 00007ffe8daf6f50 R09: 00007ffe8daf6f98
<4> [115.874155] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe8daf6f50
<4> [115.874157] R13: 00007ffe8daf6f50 R14: 00007ffe8daf4f50 R15: 00007ffe8daf6f90
<3> [115.874171] FIX kmalloc-4k: Restoring 0x00000000e0c9f1d9-0x0000000062ba1a19=0x6b

Are you sure it is notourbug?

Comment 10 Chris Wilson 2019-08-29 19:23:42 UTC

The first one is very clear a use-after-free of the skb by the usbnet driver (if you want you can dig out the previous unresolved usbnet use-after-free bug). The last one has a similar struct written into the freed buffer, so likely to be the same culprit.

Comment 11 Francesco Balestrieri 2019-09-19 13:06:51 UTC

Resolving as NOTOURBUG again given Chris' latest comments.

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