netdev - Re: RT patches expose netdev race [was Re: [RFC] [patch 2/2] powerpc 2.6.21-rt1: fix kernel hang and/or panic

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Message-ID: <yyi4pmaofps.wl@toshiba.co.jp>
Date:	Fri, 18 May 2007 14:36:47 +0900
From:	Tsutomu OWA <tsutomu.owa@...hiba.co.jp>
To:	linas@...tin.ibm.com (Linas Vepstas)
Cc:	David Miller <davem@...emloft.net>, benh@...nel.crashing.org,
	linuxppc-dev@...abs.org, mingo@...e.hu, tglx@...utronix.de,
	netdev@...r.kernel.org
Subject: Re: RT patches expose netdev race [was Re: [RFC] [patch 2/2] powerpc 2.6.21-rt1: fix kernel hang and/or panic


At Thu, 17 May 2007 18:52:47 -0500, Linas Vepstas wrote:
> The stack trace from Owa-san showed a null pointer deref at 
> ip_hdr(skb)->protocol for an skb passed in via hard_start_xmit()
> 
> I dunno, memory corruption?

  It turns out that there was a mistake in my report, sorry.
The error occurs on 2.6.21-rc5 + patch-2.6.21-rc5-rt12 + my patches,
but it does not on 2.6.21 + patch-2.6.21-rt1 + my patches (except spindernet one).

  I thought I had checked it before sending the patch, but looks like I didn't.

  My appologies...

-- owa
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