linux-kernel - Re: Crash in v2.6.30-rc3 (regression from 30-rc2)

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Message-Id: <20090422222031.17d9d72e.akpm@linux-foundation.org>
Date:	Wed, 22 Apr 2009 22:20:31 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Gregory Haskins <ghaskins@...ell.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Crash in v2.6.30-rc3 (regression from 30-rc2)

On Wed, 22 Apr 2009 22:29:56 -0400 Gregory Haskins <ghaskins@...ell.com> wrote:

> Hi All,
> 
>  FYI: I am seeing this when moving from 30-rc2 to 30-rc3 on a 4-way
> x86_64 box.
> 
> I have since reverted back to rc2, but can easily spin up the new kernel
> again to decode more info or try a fix, if desired.
> 
> One data point I do have is that the box seemed to have booted when I
> forgot to add console=ttyS0 to the kernel args.  I suspect the serial
> console is just changing timing, but its 100% reproducible in this setup.
> 
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP: [<ffffffff803863f8>] rb_erase+0x132/0x28c
> PGD 13a11e067 PUD 13dd1d067 PMD 0
> Oops: 0000 [#1] SMP
> last sysfs file:
> /sys/devices/pci0000:00/0000:00:1f.1/host6/target6:0:0/6:0:0:0/type
> CPU 0
> Modules linked in: i5000_edac shpchp rtc_core soundcore thermal sr_mod
> parport_pc processor button libphy natsemi cdrom i2c_core edac_core
> parport snd_page_alloc pcspkr serio_raw pci_hotplug rtc_lib kvm_intel sg
> joydev kvm usbhid hid linear ehci_hcd uhci_hcd sd_mod crc_t10dif usbcore
> dm_snapshot edd fan thermal_sys hwmon dm_mod ext3 mbcache jbd
> ide_pci_generic piix ide_core ata_generic ata_piix ahci libata scsi_mod
> Pid: 1561, comm: vgchange Not tainted 2.6.30-rc3-vbus #30 Precision
> WorkStation 490   
> RIP: 0010:[<ffffffff803863f8>]  [<ffffffff803863f8>] rb_erase+0x132/0x28c

I believe this is being worked on over in the thread titled "[BUG]
rbtree bug with mmotm 2009-04-14-17-24".

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