linux-kernel - Re: 2.6.22-rc2-mm1

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Date:	Thu, 24 May 2007 15:35:45 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.22-rc2-mm1

On Thu, 24 May 2007, Randy Dunlap wrote:

> This is pretty-printing.  and creature-feep.
> But lib/hexdump.c can probably do this if we add a "prefix/tag" string
> parameter to it.
> 
> Hugh D. wants it to print 32-bit quantities, not just bytes.
> Yet another parameter.
> 
> I'll look into these unless Christoph et al does so first.

I'd appreciate if you could do this. I just added a call to the function 
in hexdump.c and got this ugly output. I think we need

1. byte output

2. A way to specify the width of the description.


BUG kmalloc-16: Redzone corrupted. Expected 0xcc at 0xffff81000235ff30 but 
found 0x12
INFO: Last alloc: slab_sysfs_init+0xe1/0x280 jiffies_ago=0 cpu=0 pid=1
INFO: Object=0xffff81000235ff20 slab=0xffff81000107bcc8 offset=3872
INFO: flags=0x4000000000000082 inuse=45 freelist=0xffff81000235ff78
Bytes b4ffff81000235ff10: 00000000 00000000 5a5a5a5a 5a5a5a5a  ........ZZZZZZZZ
Objectffff81000235ff20: 00000000 00000000 00000000 00000000  ................
Redzoneffff81000235ff30: 12cccccc cccccccc  .IIIIIII
FreePointer 0xffff81000235ff38 -> 0xffff81000235ff78
Fillerffff81000235ff70: 5a5a5a5a 5a5a5a5a  ZZZZZZZZ

Call Trace:
 [<ffffffff8026d2af>] check_bytes_and_report+0x7f/0xe0
 [<ffffffff8026d573>] check_object+0x63/0x260
 [<ffffffff8026fd75>] validate_slab+0x175/0x1b0
 [<ffffffff8026fdc9>] validate_slab_slab+0x19/0x70
 [<ffffffff8026fe76>] validate_slab_cache+0x56/0x110
 [<ffffffff805d2466>] slab_sysfs_init+0x106/0x280
 [<ffffffff805c3624>] kernel_init+0xb4/0x290
 [<ffffffff8020a218>] child_rip+0xa/0x12
 [<ffffffff8038dd68>] acpi_ds_init_one_object+0x0/0x7c
 [<ffffffff805c3570>] kernel_init+0x0/0x290
 [<ffffffff8020a20e>] child_rip+0x0/0x12

FIX kmalloc-16: Restoring Redzone (0xcc) from 0xffff81000235ff30-0xffff81000235ff30


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