From: Carlos Laviola <claviola@ajato.com.br>
To: linux-kernel@vger.kernel.org
Subject: Re: Weird bug in kernel (invalid operand?)
Date: Tue, 22 May 2001 23:39:47 -0300 [thread overview]
Message-ID: <20010522233947.4426a82d.claviola@ajato.com.br> (raw)
In-Reply-To: <3B0A611F.B0A554AA@uow.edu.au>
In-Reply-To: <20010521171108.2fe854ab.claviola@ajato.com.br> <3B0A611F.B0A554AA@uow.edu.au>
On Tue, 22 May 2001 22:52:47 +1000, Andrew Morton <andrewm@uow.edu.au> wrote:
> Carlos Laviola wrote:
> >
> > invalid operand: 0000
[ ... oops here ... ]
> > Segmentation fault
> >
> > This seems to be a bug in the kernel, maybe because the file is too big,
> > and VFAT partitions don't like that.
>
> It used to be that fatfs would hit the second BUG() in fat_get_block()
> when a file reaches two gig. But I can't make that happen in testing,
> because the s_maxbytes stuff restricts it to 2gig-1. What you *should*
> have seen was `wget' locking up because of a different bug :)
>
> Are you sure you got this with 2.4.4? If so, please run the
> output through
>
> ksymoops -m System.map < oops-text
Well, in fact, I was using 2.4.5-pre1 when I had this problem. However, since
it doesn't seem like anything within the VFAT subsystem has changed from 2.4.4
to 2.4.5-pre1, 2.4.4 is probably buggy too. The relevant output from ksymoops
is below.
>>EIP; c48fb709 <[fat]fat_get_block+5d/dc> <=====
Code; c48fb709 <[fat]fat_get_block+5d/dc>
00000000 <_EIP>:
Code; c48fb709 <[fat]fat_get_block+5d/dc> <=====
0: 0f 0b ud2a <=====
Code; c48fb70b <[fat]fat_get_block+5f/dc>
2: 83 c4 0c add $0xc,%esp
Code; c48fb70e <[fat]fat_get_block+62/dc>
5: b8 fb ff ff ff mov $0xfffffffb,%eax
Code; c48fb713 <[fat]fat_get_block+67/dc>
a: eb 6d jmp 79 <_EIP+0x79> c48fb782 <[fat]fat_get_block+d6/dc>
Code; c48fb715 <[fat]fat_get_block+69/dc>
c: 8b 87 8c 00 00 00 mov 0x8c(%edi),%eax
Code; c48fb71b <[fat]fat_get_block+6f/dc>
12: 0f b7 00 movzwl (%eax),%eax
Thanks,
Carlos.
--
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prev parent reply other threads:[~2001-05-23 2:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-21 20:11 Carlos Laviola
2001-05-22 12:52 ` Andrew Morton
2001-05-23 2:39 ` Carlos Laviola [this message]
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