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Thread: Re: Mmap of shared file Operation not permitted
Re: Mmap of shared file Operation not permitted
country flaguser name
United States		 2007-08-27 09:11:32 

  


  

    >> Mmap of shared file /tmp/catapult/session_data failed: 
>> Operation not permitted at /usr/lib/perl5/Cache/FastMmap.pm line 496.

Yousef Alhashemi:
> Did you switch between the development server and some other 
> server, like apache/fastcgi? If so, you can either chown 
> /tmp/catapult (and all of its contents) to the appropriate 
> user (e.g. apache or your username), or delete /tmp/catapult 
> and the server you're currently using will just (re)create it
> and be able to read/write to it (but you'll lose your session data).

This may be at OS level; I have a hosted app that suddenly 
stopped working. It's pw protected, alpha, I'm doing local
mods, so didn't spend any time on it. But decided this weekend
to attack it. 

I had not changed anything on the hosted site, but noticed the
apache2 error log statement. I upgraded the OS -- debian etch --
upgraded all perl modules, noticed I
 could not install 
Catalyst-Plugin-Session-Store-FastMmap as root using CPAN.pm. 
I got same error as above:

t/basic............ok 1/20Mmap of shared file /tmp/sessionstoretest/session_data failed: Operation not permitted at /usr/lib/perl5/Cache/FastMmap.pm line 496.

I installed the debian package for c-p-session-store-FastMmap,
but am still getting the error on startup attempt for my app.

Yes, I also chowned /tmp/catapult/session_data file, that did not work.
I tried deleting  the file, deleted the /tmp/catapult directory, on startup the module successfully recreates the dir and file, but then bombs out. 
I've tried running the app by way of apache2, as well as using the catalyst server both as the app user (www-data) as well as root; "Operation not permitted."

I'll switch to another news group if need be, but I wanted to
first check this list. I am not (yet) well-schooled on just
how Cache/FastMmap works, or why he's
 not allowed to do that 
operation. 

/dennis



  

  
  
   
     
    

  

    Re:  Mmap of shared file Operation not
permitted
  


  

     country flaguser name
Romania		
     2007-08-27 09:36:41
  


  

    
Dennis Daupert wrote:
> I had not changed anything on the hosted site, but
noticed the
> apache2 error log statement. I upgraded the OS --
debian etch --
> upgraded all perl modules, noticed I could not install
> Catalyst-Plugin-Session-Store-FastMmap as root using
CPAN.pm.
> I got same error as above:
>
> t/basic............ok 1/20Mmap of shared file
> /tmp/sessionstoretest/session_data failed: Operation
not permitted at
> /usr/lib/perl5/Cache/FastMmap.pm line 496.
>
> I'll switch to another news group if need be, but I
wanted to
> first check this list. I am not (yet) well-schooled on
just
> how Cache/FastMmap works, or why he's not allowed to do
that
> operation.

If /tmp is mounted with the 'noexec' option, a mmap with
PROT_EXEC will
fail with EPERM which translates to the above error message.
Dunno, if
that's the case for Cache::FastMmap but I would still check
mount
options for /tmp


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