From: Stephen Hemminger <stephen@networkplumber.org>
To: netdev@vger.kernel.org
Subject: Fw: [Bug 195647] New: Slab corruption with network packet poison data
Date: Wed, 3 May 2017 15:54:54 -0700 [thread overview]
Message-ID: <20170503155454.3ae7df69@xeon-e3> (raw)
Begin forwarded message:
Date: Wed, 03 May 2017 13:37:39 +0000
From: bugzilla-daemon@bugzilla.kernel.org
To: stephen@networkplumber.org
Subject: [Bug 195647] New: Slab corruption with network packet poison data
https://bugzilla.kernel.org/show_bug.cgi?id=195647
Bug ID: 195647
Summary: Slab corruption with network packet poison data
Product: Networking
Version: 2.5
Kernel Version: 4.11.0-rc8+
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: IPV4
Assignee: stephen@networkplumber.org
Reporter: imre.deak@intel.com
Regression: No
Created attachment 256177
--> https://bugzilla.kernel.org/attachment.cgi?id=256177&action=edit
dmesg
During CI testing on a KBL machine we got the slab corruption below. Not sure
if it's really a network problem or which part of the network stack it would
originate from.
I attached the full dmesg. The poison data without the first 4 bytes looks like
an Ethernet packet containing a DHCP ACK message shown as such by WireShark if
imported as a hex dump.
[ 536.637685]
=============================================================================
[ 536.637703] BUG kmalloc-4096 (Tainted: G U W ): Poison overwritten
[ 536.637714]
-----------------------------------------------------------------------------
[ 536.637730] Disabling lock debugging due to kernel taint
[ 536.637731] INFO: 0xffff880264921198-0xffff8802649212f1. First byte 0x56
instead of 0x6b
[ 536.637740] INFO: Allocated in kernfs_iop_get_link+0x3e/0x1e0 age=4142 cpu=2
pid=9676
[ 536.637748] ___slab_alloc.constprop.28+0x38f/0x3d0
[ 536.637753] __slab_alloc.isra.22.constprop.27+0x43/0x80
[ 536.637758] kmem_cache_alloc_trace+0x237/0x2e0
[ 536.637762] kernfs_iop_get_link+0x3e/0x1e0
[ 536.637768] trailing_symlink+0x1e5/0x230
[ 536.637772] path_lookupat+0x5b/0x100
[ 536.637776] filename_lookup+0xa0/0x120
[ 536.637781] user_path_at_empty+0x31/0x40
[ 536.637785] SyS_faccessat+0xa6/0x210
[ 536.637789] SyS_access+0x13/0x20
[ 536.637793] entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 536.637799] INFO: Freed in kfree_link+0x9/0x10 age=4142 cpu=2 pid=9676
[ 536.637804] __slab_free+0x3cb/0x580
[ 536.637808] kfree+0x266/0x2e0
[ 536.637812] kfree_link+0x9/0x10
[ 536.637816] walk_component+0xc4/0x2d0
[ 536.637820] path_lookupat+0x4f/0x100
[ 536.637824] filename_lookup+0xa0/0x120
[ 536.637828] user_path_at_empty+0x31/0x40
[ 536.637833] SyS_faccessat+0xa6/0x210
[ 536.637836] SyS_access+0x13/0x20
[ 536.637840] entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 536.637846] INFO: Slab 0xffffea0009924800 objects=7 used=7 fp=0x
(null) flags=0x8000000000008100
[ 536.637854] INFO: Object 0xffff880264921158 @offset=4440
fp=0xffff8802649267e8
[ 536.637863] Redzone ffff880264921150: bb bb bb bb bb bb bb bb
........
[ 536.637870] Object ffff880264921158: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.637877] Object ffff880264921168: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.637885] Object ffff880264921178: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.637892] Object ffff880264921188: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.637899] Object ffff880264921198: 56 01 a9 fe 00 10 60 31 d6 53 68 05 ca
2f 15 dd V.....`1.Sh../..
[ 536.637907] Object ffff8802649211a8: 08 00 45 10 01 48 00 00 00 00 80 11 b6
29 c0 a8 ..E..H.......)..
[ 536.637914] Object ffff8802649211b8: 01 01 c0 a8 01 1a 00 43 00 44 01 34 2d
a0 02 01 .......C.D.4-...
[ 536.637921] Object ffff8802649211c8: 06 00 bf be 60 1b 00 00 00 00 00 00 00
00 c0 a8 ....`...........
[ 536.637929] Object ffff8802649211d8: 01 1a 00 00 00 00 00 00 00 00 00 10 60
31 d6 53 ............`1.S
[ 536.637936] Object ffff8802649211e8: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637943] Object ffff8802649211f8: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637951] Object ffff880264921208: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637958] Object ffff880264921218: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637965] Object ffff880264921228: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637973] Object ffff880264921238: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637980] Object ffff880264921248: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637987] Object ffff880264921258: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.637995] Object ffff880264921268: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.638002] Object ffff880264921278: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.638009] Object ffff880264921288: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.638017] Object ffff880264921298: 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 ................
[ 536.638024] Object ffff8802649212a8: 00 00 00 00 00 00 00 00 00 00 63 82 53
63 35 01 ..........c.Sc5.
[ 536.638031] Object ffff8802649212b8: 05 36 04 c0 a8 01 01 33 04 00 00 0e 10
01 04 ff .6.....3........
[ 536.638039] Object ffff8802649212c8: ff ff 00 03 04 c0 a8 01 01 0f 0c 66 69
2e 69 6e ...........fi.in
[ 536.638046] Object ffff8802649212d8: 74 65 6c 2e 63 6f 6d 06 0c 0a f8 02 01
a3 21 fd tel.com.......!.
[ 536.638053] Object ffff8802649212e8: 4c 0a b8 09 09 ff 00 00 00 00 6b 6b 6b
6b 6b 6b L.........kkkkkk
[ 536.638061] Object ffff8802649212f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638068] Object ffff880264921308: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638075] Object ffff880264921318: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638083] Object ffff880264921328: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638090] Object ffff880264921338: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638097] Object ffff880264921348: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638105] Object ffff880264921358: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638112] Object ffff880264921368: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638119] Object ffff880264921378: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638127] Object ffff880264921388: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638134] Object ffff880264921398: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638141] Object ffff8802649213a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638149] Object ffff8802649213b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638156] Object ffff8802649213c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638163] Object ffff8802649213d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638171] Object ffff8802649213e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638178] Object ffff8802649213f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638186] Object ffff880264921408: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638193] Object ffff880264921418: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638200] Object ffff880264921428: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638208] Object ffff880264921438: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638215] Object ffff880264921448: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638222] Object ffff880264921458: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638229] Object ffff880264921468: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638237] Object ffff880264921478: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638244] Object ffff880264921488: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638252] Object ffff880264921498: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638259] Object ffff8802649214a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638266] Object ffff8802649214b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638274] Object ffff8802649214c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638281] Object ffff8802649214d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638288] Object ffff8802649214e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638296] Object ffff8802649214f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638303] Object ffff880264921508: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638310] Object ffff880264921518: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638318] Object ffff880264921528: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638325] Object ffff880264921538: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638332] Object ffff880264921548: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638340] Object ffff880264921558: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638347] Object ffff880264921568: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638354] Object ffff880264921578: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638362] Object ffff880264921588: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638369] Object ffff880264921598: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638376] Object ffff8802649215a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638384] Object ffff8802649215b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638391] Object ffff8802649215c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638398] Object ffff8802649215d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638406] Object ffff8802649215e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638413] Object ffff8802649215f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638420] Object ffff880264921608: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638428] Object ffff880264921618: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638435] Object ffff880264921628: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638443] Object ffff880264921638: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638450] Object ffff880264921648: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638457] Object ffff880264921658: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638465] Object ffff880264921668: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638472] Object ffff880264921678: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638479] Object ffff880264921688: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638487] Object ffff880264921698: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638494] Object ffff8802649216a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638501] Object ffff8802649216b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638509] Object ffff8802649216c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638516] Object ffff8802649216d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638523] Object ffff8802649216e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638531] Object ffff8802649216f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638538] Object ffff880264921708: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638545] Object ffff880264921718: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638553] Object ffff880264921728: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638560] Object ffff880264921738: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638567] Object ffff880264921748: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638574] Object ffff880264921758: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638582] Object ffff880264921768: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638589] Object ffff880264921778: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638597] Object ffff880264921788: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638604] Object ffff880264921798: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638611] Object ffff8802649217a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638619] Object ffff8802649217b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638626] Object ffff8802649217c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638633] Object ffff8802649217d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638640] Object ffff8802649217e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638648] Object ffff8802649217f8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638655] Object ffff880264921808: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638662] Object ffff880264921818: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638670] Object ffff880264921828: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638677] Object ffff880264921838: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638684] Object ffff880264921848: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638692] Object ffff880264921858: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638699] Object ffff880264921868: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638707] Object ffff880264921878: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638714] Object ffff880264921888: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638721] Object ffff880264921898: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638729] Object ffff8802649218a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638736] Object ffff8802649218b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638760] Object ffff8802649218c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.638768] Object ffff8802649218d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
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6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.639790] Object ffff880264922128: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.639797] Object ffff880264922138: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b 6b kkkkkkkkkkkkkkkk
[ 536.639804] Object ffff880264922148: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
6b 6b a5 kkkkkkkkkkkkkkk.
[ 536.639812] Redzone ffff880264922158: bb bb bb bb bb bb bb bb
........
[ 536.639819] Padding ffff880264922298: 5a 5a 5a 5a 5a 5a 5a 5a
ZZZZZZZZ
[ 536.639826] CPU: 1 PID: 9693 Comm: kms_setmode Tainted: G BU W
4.11.0-rc8-CI-Patchwork_4598+ #1
[ 536.639827] Hardware name: Dell Inc. XPS 13 9360/093TW6, BIOS 1.3.2
01/18/2017
[ 536.639828] Call Trace:
[ 536.639831] dump_stack+0x67/0x92
[ 536.639832] print_trailer+0x14b/0x230
[ 536.639834] check_bytes_and_report+0xc0/0x100
[ 536.639835] check_object+0x261/0x2b0
[ 536.639855] ? __pdp_init.isra.4+0x44/0x90 [i915]
[ 536.639857] alloc_debug_processing+0x199/0x1b0
[ 536.639858] ___slab_alloc.constprop.28+0x38f/0x3d0
[ 536.639871] ? __pdp_init.isra.4+0x44/0x90 [i915]
[ 536.639872] ? ___slab_alloc.constprop.28+0x2ab/0x3d0
[ 536.639874] ? ___slab_alloc.constprop.28+0x2ab/0x3d0
[ 536.639885] ? alloc_pdp+0x3a/0xd0 [i915]
[ 536.639887] ? save_stack.isra.2+0x53/0xa0
[ 536.639899] ? __pdp_init.isra.4+0x44/0x90 [i915]
[ 536.639900] __slab_alloc.isra.22.constprop.27+0x43/0x80
[ 536.639902] ? __slab_alloc.isra.22.constprop.27+0x43/0x80
[ 536.639903] __kmalloc+0x288/0x330
[ 536.639914] __pdp_init.isra.4+0x44/0x90 [i915]
[ 536.639925] alloc_pdp+0x62/0xd0 [i915]
[ 536.639935] gen8_ppgtt_alloc_4lvl+0xba/0x150 [i915]
[ 536.639946] ppgtt_bind_vma+0x2c/0x80 [i915]
[ 536.639959] i915_vma_bind+0xb9/0x240 [i915]
[ 536.639972] __i915_vma_do_pin+0x404/0x6b0 [i915]
[ 536.639983] i915_gem_execbuffer_reserve_vma.isra.9+0xc3/0x240 [i915]
[ 536.639994] i915_gem_execbuffer_reserve.isra.10+0x43e/0x470 [i915]
[ 536.640005] i915_gem_do_execbuffer.isra.16+0x639/0x1b80 [i915]
[ 536.640007] ? __lock_acquire+0x484/0x1ac0
[ 536.640019] i915_gem_execbuffer2+0xb5/0x220 [i915]
[ 536.640021] drm_ioctl+0x1f4/0x480
[ 536.640031] ? i915_gem_execbuffer+0x330/0x330 [i915]
[ 536.640034] do_vfs_ioctl+0x90/0x6e0
[ 536.640035] ? entry_SYSCALL_64_fastpath+0x5/0xb1
[ 536.640038] ? __this_cpu_preempt_check+0x13/0x20
[ 536.640039] ? trace_hardirqs_on_caller+0xe7/0x200
[ 536.640041] SyS_ioctl+0x3c/0x70
[ 536.640042] entry_SYSCALL_64_fastpath+0x1c/0xb1
[ 536.640044] RIP: 0033:0x7f002a137357
[ 536.640045] RSP: 002b:00007fffb9318468 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[ 536.640046] RAX: ffffffffffffffda RBX: ffffffff8147cea3 RCX:
00007f002a137357
[ 536.640047] RDX: 00007fffb9318500 RSI: 0000000040406469 RDI:
0000000000000004
[ 536.640047] RBP: ffffc900003d7f88 R08: 0000000000000008 R09:
0000000000000000
[ 536.640048] R10: 000000000000001f R11: 0000000000000246 R12:
0000000000000000
[ 536.640049] R13: 0000000000000004 R14: 0000000040406469 R15:
0000000000000001
[ 536.640051] ? __this_cpu_preempt_check+0x13/0x20
[ 536.640052] FIX kmalloc-4096: Restoring
0xffff880264921198-0xffff8802649212f1=0x6b
[ 536.640061] FIX kmalloc-4096: Marking all objects used
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