linux-kernel - Re: 2.6.21.14 NFS related oops

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Date:	Sat, 16 Jun 2007 11:26:09 +0200
From:	Maciej Sołtysiak <solt2@....toxicfilms.tv>
To:	"Trond Myklebust" <trond.myklebust@....uio.no>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: 2.6.21.14 NFS related oops

>>  =======================
>> Code: 10 89 5c 24 10 89 c3 89 7c 24 18 89 d7 89 74 24 14 8b 70 28 75 1a 
>> 8b
>> 4e 08 89 fa 89 d8 ff 51 18 8b 5c 24 10 83 74 24 14 8b 7c 24 <18> 83 c4 1c 
>> c3
>> 89 74 24 0c 8b 40 10 8b 40 24 8b 40 10 8b 40 08 EIP: [<f0a93c94>]
>> rpcauth_checkverf+0x34/0x70 [sunrpc] SS:ESP 0068:e64b5eec
>
> At a first guess, it looks as though something has scribbled over your
> credential. Have you tried running this kernel with slab debugging
> enabled?

I'm running 2.6.21.5 now with slab debugging on, here's what I got about
slab corruption:

Slab corruption: skbuff_head_cache start=ef287b78, len=164
Redzone: 0x5a2cf071/0x5a2cf071.
Last user: [<c031710c>](kfree_skbmem+0x3c/0x90)
090: 6b 6b 6b 6b 6b 63 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b
Single bit error detected. Probably bad RAM.
Run memtest86+ or a similar memory test tool.
Prev obj: start=ef287ac8, len=164
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c031798b>](__alloc_skb+0x2b/0x100)
000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
010: 00 00 00 00 e0 71 e6 ef 00 00 00 00 00 00 00 00
Next obj: start=ef287c28, len=164
Redzone: 0x170fc2a5/0x170fc2a5.
Last user: [<c031798b>](__alloc_skb+0x2b/0x100)
000: 84 d0 85 c5 84 d0 85 c5 04 d0 85 c5 2c 0a 73 46
010: 6f cd 09 00 00 00 00 00 01 00 00 00 08 e5 72 ee

How probable is that it is really a bad memory issue?
Does this report say anything about which RAM chip I should
investigate/replace ? I have 1x512MB+1x256MB

Best Regards,
Maciej

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