Re: glibc 2.14-4 eats my data (Re: F15 ext3, eCryptfs + samba = data corruption (Re: F15 "Error mounting eCryptfs: [-5] Input/output error" on different disks))

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On 07/11/2011 05:40 PM, Michał Piotrowski wrote:
> Hi,
>
> W dniu 11 lipca 2011 17:09 użytkownik Michal Hlavinka
> <mhlavink@xxxxxxxxxx>  napisał:
>> ok, complain about memcpy in ecryptfs-utils is gone. I've checked all of
>> them and I think I've fixed those which needed it. I was not able to
>> reproduce original problem nor valgrind complaint, so please test if
>> following package produces memcpy complain in valgrind output or not:
>>
>> http://kojipkgs.fedoraproject.org/scratch/mhlavink/task_3190860/
>
> Your mtab handling patch fixed both issues - mount warning and data
> corruption :) Huge thanks!

I can't imagine *how* it could affect this, so I'd advice to monitor it 
carefully if it is fixed for real. Btw, there is not only mtab patch, 
but 2x memcpy -> memmove too, just not all of them as in previous test 
package (which did not help).

>> Could you describe your environment in more details so we can try to
>> reproduce it? For example what ecryptfs options you use (including fstab
>> line if you have any), samba configuration etc...
>
> I do not think that it had any significance - it seems to me that
> these options are pretty standard
> mount -t ecryptfs /home/$SHARE/ /home/$SHARE/ -o
> key=passphrase,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_passthrough=n,ecryptfs_fnek_sig=some_value
>
> It's a little strange that you could not reproduce that mount warning.

AFAIK that memcpy warning from valgrind gets triggered only if you use 
"correct" -o ... option

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