linux-kernel - Re: [crash, bisected] net, sky2: BUG: unable to handle kernel NULL pointer dereference, pci_vpd

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Message-ID: <20090406092517.GA4405@elte.hu>
Date:	Mon, 6 Apr 2009 11:25:17 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Stephen Hemminger <shemminger@...tta.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [crash, bisected] net, sky2: BUG: unable to handle kernel NULL
	pointer dereference, pci_vpd_truncate()


* Ingo Molnar <mingo@...e.hu> wrote:

> Not sure whether this has been reported before, but one of the 
> -tip testboxes started showing the boot crash attached below. 
> Reproduces with latest -git.
> 
> I have bisected it to:
> 
> | installing & booting kernel ... => good. (114 seconds)
> | 3834507d0c5480a0f05486c2fb57ed18fd179a83 is first bad commit
> | commit 3834507d0c5480a0f05486c2fb57ed18fd179a83
> | Author: Stephen Hemminger <shemminger@...tta.com>
> | Date:   Tue Feb 3 11:27:30 2009 +0000
> |
> |     sky2: set VPD size
> |    
> |     Read configuration register during probe and use it to size the
> |     available VPD. Move existing code using same register slightly
> |     earlier in probe handling.
> 
> [ I'm testing the straight revert currently. Can send more info if 
>   needed. ]

The revert solved the crash.

	Ingo
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