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

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Date:	Sun, 26 Apr 2009 08:36:15 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Gregory Haskins <ghaskins@...ell.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Crash in v2.6.30-rc3 (regression from 30-rc2)

On Wed, Apr 22 2009, Andrew Morton wrote:
> 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".

It is, it is also fixed and in -git since yesterday (or friday, I
forget). The commit is:

3ac6c9f8a66726745136e46f63600550c3eb6cec

-- 
Jens Axboe

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