Re: Data Corruption using cryptsetup luks on ARM arch

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On Mon, Sep 14, 2009 at 06:25:10AM -0300, Salatiel Filho wrote:
> On Mon, Sep 14, 2009 at 00:35, Arno Wagner <arno@xxxxxxxxxxx> wrote:
> > On Sun, Sep 13, 2009 at 07:19:00PM -0300, Salatiel Filho wrote:
> >> Where should i report that i get lots of corruption when using
> >> cryptsetup on arm architecture ?
> >>
> >> - Can not use crypted swap , cause page allocator will fail and my
> >> programs will start to seg fault.
> >> - Some files just get corrupted on copying...
> >>
> >> Anyone can help me ?debug it , so i can report ?developers and they
> >> can fix this.
> >
> > If it generally works, but sometimes corrupts, then this
> > very likely has nothing to to with dm-crypt. In fact it
> > sounds like you have defective hardware, but more detail
> > is needed for even a rough guess.
> >
> I do not think  it is a hardware problem since the disk is  fine and
> it works fine in other architectures with no corruption at all. And
> the page allocator failure always happens when using crypted swap but
> there is no problem when using uncrypted swap.

Determine the exact nature of the corruption. It is really
a waste of time to speculate before you have that. Best 
option is a binary compare of a corrupted file with the 
uncorrupted version. Use something like

cmp -b -l <file1> <file2>


Arno
-- 
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@xxxxxxxxxxx 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 
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