linux-kernel - Re: BUG kmalloc-4096: Poison overwritten

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Date:	Sun, 06 Jun 2010 08:27:43 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	"Justin P. Mattock" <justinmattock@...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
Subject: Re: BUG kmalloc-4096: Poison overwritten

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?

-- 
js
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