From: Gabriel Barazer <gabriel@oxeva.fr>
Subject: Re: mountd randomly crash and panic the server
Date: Mon, 16 Apr 2007 16:07:09 +0200
Message-ID: <4623830D.7040108@oxeva.fr>
References: <461CFABE.9050301@barazer.net>	<46234130.5020502@oxeva.fr>
	<17955.21572.383131.837268@notabene.brown>
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Cc: nfs@lists.sourceforge.net
To: Neil Brown <neilb@suse.de>
In-Reply-To: <17955.21572.383131.837268@notabene.brown>
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On 04/16/2007 12:47:32 +0200, Neil Brown <neilb@suse.de> wrote:

> On Monday April 16, gabriel@oxeva.fr wrote:

>>
>> Is this related to the kernel cache_clean function in net/sunrpc/cache.c ?
> 
> Yes.  It is crashing at:
> 		for (; ch; cp= & ch->next, ch= *cp) {
> 			if (current_detail->nextcheck > ch->expiry_time)
>                                                         ^^^^^^
> 				current_detail->nextcheck = ch->expiry_time+1;
> 			if (ch->expiry_time >= get_seconds()
> 
> ch has a garbage value (0001e71926010009), presumable because a
> previous cp had been corrupted, most likely by being freed while still
> in use.
> 

Maybe this can helps : I never encountered the problem with kernel 
2.6.18, maybe this can restrict the scope for where is this corruption 
happening ?

> Bother.
> 
> I'll see if I can figure out what is happening.
> 
> Thanks for the report.
> 
> NeilBrown

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