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Message-ID: <6bffcb0e0608181549o3034398fob3763d3ce0869cfe@mail.gmail.com>
Date: Sat, 19 Aug 2006 00:49:50 +0200
From: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
To: "Catalin Marinas" <catalin.marinas@gmail.com>
Subject: Re: [PATCH 2.6.18-rc4 00/10] Kernel memory leak detector 0.9
Cc: linux-kernel@vger.kernel.org
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On 18/08/06, Catalin Marinas <catalin.marinas@gmail.com> wrote:
> On 18/08/06, Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote:
> > cat /sys/kernel/debug/memleak + LTP + patching repo = oops?
> >
> > BUG: unable to handle kernel paging request at virtual address 6b6b6b6b
>
> I got this as well today on an 4-CPU ARM platform. I changed some list
> traversal to the RCU variants but forgot to change the list_del/add. I
> attach another patch which fixes this (haven't tested it extensively
> yet).

Thanks.

I just added your "Fix memory leak in vc_resize/vc_allocate" patch to
my series file.

orphan pointer 0xc6110000 (size 12288):
  c017480e: <__kmalloc>
  c024dda4: <vc_resize>
  c020ed9c: <fbcon_startup>
  c0251028: <register_con_driver>
  c02511e0: <take_over_console>
  c020e21e: <fbcon_takeover>
  c0212b08: <fbcon_fb_registered>
  c0212ce1: <fbcon_event_notify>
orphan pointer 0xf55b0000 (size 8208):
  c017480e: <__kmalloc>
  c0211bb8: <fbcon_set_font>
  c0251b17: <con_font_set>
  c0251c7b: <con_font_op>
  c0249a97: <vt_ioctl>
  c024432e: <tty_ioctl>
  c0189fd1: <do_ioctl>
  c018a269: <vfs_ioctl>

This is interesting. Is it too large?
orphan pointer 0xfe09f000 (size 4194304):
  c016cb9c: <__vmalloc_node>
  c016cbb2: <__vmalloc>
  c016cbc7: <vmalloc>
  fdd3bbe1: <txInit>
  fdd23b73: <init_jfs_fs>
  c0149fea: <sys_init_module>

A simple way to reproduce:

while true
do
sudo mount -o loop -t jfs /home/fs-farm/jfs.img /mnt/fs-farm/jfs/
sudo umount /mnt/fs-farm/jfs/
done

A large collection of false positives :)
http://www.stardust.webpages.pl/files/o_bugs/kmemleak-0.9/ml_collection/ml1.tar

>
> Thanks.
>
> --
> Catalin
>
>
>

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/wiki/)
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