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Date: Sun, 06 Jun 2010 14:06:32 -0700
From: "Justin P. Mattock" <justinmattock@...il.com>
To: Jiri Slaby <jirislaby@...il.com>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
the arch/x86 maintainers <x86@...nel.org>,
linux-video@...ey.karlin.mff.cuni.cz, frankpzh@...il.com
Subject: Re: BUG kmalloc-4096: Poison overwritten
On 06/05/2010 11:27 PM, Jiri Slaby wrote:
> On 06/06/2010 08:12 AM, Justin P. Mattock wrote:
>> =============================================================================
>>
>> [ 0.002046] BUG kmalloc-4096: Poison overwritten
>> [ 0.002051]
>> -----------------------------------------------------------------------------
>>
>> [ 0.002052]
>> [ 0.002063] INFO: 0xffff88003ec09e00-0xffff88003ec09e9f. First byte
>> 0x20 instead of 0x6b
>> [ 0.002073] INFO: Slab 0xffffea0000dba1c0 objects=7 used=1
>> fp=0xffff88003ec09048 flags=0x40000000000040c3
>> [ 0.002082] INFO: Object 0xffff88003ec09048 @offset=4168
>> fp=0xffff88003ec0a090
>> [ 0.002083]
>> [ 0.002093] Bytes b4 0xffff88003ec09038: 00 00 00 00 00 00 00 00 5a
>> 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
>> [ 0.002114] Object 0xffff88003ec09048: 6b 6b 6b 6b 6b 6b 6b 6b 6b
>> 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
> ...
>> 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
>> [ 0.002999] Object 0xffff88003ec09df8: 6b 6b 6b 6b 6b 6b 6b 6b 20
>> 07 20 07 20 07 20 07 kkkkkkkk........
>> [ 0.002999] Object 0xffff88003ec09e08: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e18: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e28: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e38: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e48: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e58: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e68: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e78: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e88: 20 07 20 07 20 07 20 07 20
>> 07 20 07 20 07 20 07 ................
>> [ 0.002999] Object 0xffff88003ec09e98: 20 07 20 07 20 07 20 07 6b
>> 6b 6b 6b 6b 6b 6b 6b ........kkkkkkkk
>> [ 0.002999] Object 0xffff88003ec09ea8: 6b 6b 6b 6b 6b 6b 6b 6b 6b
>
> Just guessing, grey spaces which should go to video ram?
>
o.k. I bisected this down to this commit:
962400e8fd29
reverting gets dmesg to not
have a Poison overwritten..
as for the screen blankness I think this
did cause it..keep in mind the blankness(black)
is not everytime(every so often)
here's some images of it:
http://www.flickr.com/photos/44066293@N08/4676350524/
http://www.flickr.com/photos/44066293@N08/4676350016/
(and some other images of frisco for your enjoyment!!)
Justin P. Mattock
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