linux-kernel - [cpuid4_cache_sysfs_exit] BUG kmalloc-512 (Not tainted): Poison overwritten

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Date:	Tue, 27 Aug 2013 09:23:38 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Russell King <rmk+kernel@....linux.org.uk>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Mike Travis <travis@....com>, Ingo Molnar <mingo@...nel.org>,
	linux-kernel@...r.kernel.org, fengguang.wu@...el.com
Subject: [cpuid4_cache_sysfs_exit] BUG kmalloc-512 (Not tainted): Poison
 overwritten

Hi Russell,

You commit is so good at catching errors!

commit c817a67ecba7c3c2aaa104796d78f160af60920d
Author: Russell King <rmk+kernel@....linux.org.uk>
Date:   Thu Jun 27 15:06:14 2013 +0100

    kobject: delayed kobject release: help find buggy drivers
    

Here is another one, full dmesg attached.

modprobe: FATAL: Could not load /lib/modules/3.11.0-rc6-next-20130822-07070-g245f086/modules.dep: No such file or directory
[    4.993719] =============================================================================
[    4.994014] BUG kmalloc-512 (Not tainted): Poison overwritten
[    4.994014] -----------------------------------------------------------------------------
[    4.994014]
[    4.994014] Disabling lock debugging due to kernel taint
[    4.994014] INFO: 0x78094c00-0x78094c03. First byte 0x68 instead of 0x6b
[    4.994014] INFO: Allocated in kzalloc.constprop.12+0xd/0xf age=888 cpu=0 pid=1
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014] INFO: Freed in cpuid4_cache_sysfs_exit+0x30/0x8c age=223 cpu=1 pid=1
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014]
[    4.994014] INFO: Slab 0x866a0720 objects=23 used=23 fp=0x  (null) flags=0x4080
[    4.994014] INFO: Object 0x78094ac0 @offset=2752 fp=0x  (null)


git bisect start 5e8d1acd05687720cbb0b08975eacb7588fdfc42 v3.10 --
git bisect good 8cbd0eefcaf8cc32ded2bf229f0fc379b2ad69f2  # 13:42     55+  Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
git bisect good 60a2b977533c312d271563d955ef7b8e35a6aa38  # 14:47     55+  Merge remote-tracking branch 'infiniband/for-next'
git bisect  bad 4a225b466e040a70e7d12b159d2a36da1c2ef7dc  # 14:57      0-  next-20130821/driver-core
git bisect good 98246c1ae6f18fe1b710cdff687b6b7077f739c9  # 15:27     55+  Merge remote-tracking branch 'virtio/virtio-next'
git bisect good 38136c1f1471c7dcbe889beb790cc4d331e9d3ad  # 18:45     55+  Merge remote-tracking branch 'spi/for-next'
git bisect good f07762be3b9222a7649cb29a3f5b959204d40446  # 19:17     55+  Merge branch 'x86/asmlinkage'
git bisect good 93d6294dfcdff81194086ed9bd6ceca3bc5e5863  # 22:17     55+  Merge remote-tracking branch 'kvm-ppc/kvm-ppc-next'
git bisect good c57e8c89b271af4ef914c439effffed53c39434c  # 01:28     55+  Merge remote-tracking branch 'leds/for-next'
git bisect  bad 76f411fb3a62711de7f59e0f4c56456fe356675a  # 01:40      0-  x86 / cpu topology: remove the stale macro arch_provides_topology_pointers
git bisect  bad ea1bb7064fd6972ef00a93ba882a2f38450b273e  # 01:47      0-  video: backlight: convert class code to use dev_groups
git bisect good e56341ad380114454119ac043e6d710ddbbb7710  # 09:41     55+  staging: comedi: convert class code to use dev_groups
git bisect  bad c817a67ecba7c3c2aaa104796d78f160af60920d  # 10:20      0-  kobject: delayed kobject release: help find buggy drivers
git bisect good 7c42721fe0c58a848849b43ff558cf2fb86aa35a  # 13:57     55+  char: tile-srom: fix build error
git bisect good 7c42721fe0c58a848849b43ff558cf2fb86aa35a  # 17:36    165+  char: tile-srom: fix build error
git bisect  bad 245f08699d5320f021070ed8698ac89ebf2f0670  # 17:36      0-  Add linux-next specific files for 20130822
git bisect good 754ad8d4fe504c68d209749f5c49b578d68a0106  # 18:42    165+  Revert "kobject: delayed kobject release: help find buggy drivers"
git bisect good d8dfad3876e4386666b759da3c833d62fb8b2267  # 03:59    165+  Linux 3.11-rc7
git bisect  bad 245f08699d5320f021070ed8698ac89ebf2f0670  # 03:59      0-  Add linux-next specific files for 20130822

Thanks,
Fengguang

View attachment "dmesg-kvm-bens-3174-20130825060922-3.11.0-rc6-next-20130822-07070-g245f086-1" of type "text/plain" (50833 bytes)

Download attachment "bisect-245f08699d5320f021070ed8698ac89ebf2f0670-i386-randconfig-j7-08250355-BUG-kmalloc-2052.log" of type "application/octet-stream" (43449 bytes)

View attachment "config-3.11.0-rc6-next-20130822-07070-g245f086" of type "text/plain" (85369 bytes)