[Dazuko-devel] Re: LSM of Dazuko on kernel 2.6.32

[errik]

Hi All,

    I have found a way to get the event type. I use file_permission to replace inode_permission for the security hook point and use FMODE_EXEC & file->f_flags to get the event type.

    When a sys_execve is called, the open_exec will return a struct file * with file->f_flags set to FMODE_EXEC.

   

Thanks,

Errik

2011/2/18 errik <address@hidden>

Hi John,

    These days I am trying to find a way to do execve hook on 2.6.32 kernel.

    I  have tried dazukofs, it works with risk because we can't stop it after we mount a directory as dazukofs. The only way is to reboot the OS. If I mount watching directories to dazukofs, it has some potential impact to my server.

    Also I tried redirfs, it only supports open and close hook not support execve hook.

    At the end I tried to port Dazuko (LSM way) to kernel 2.6.32. The execve hook works fine with dazuko-LSM. But after I modify all the security APIs for 2.6.32, I found the kernel API  register_security is not exported event there is no kernel API unregister_security.

  

    So I hope I can get some suggestions from you:

    1. Is it possibile that I continue to use LSM on kernel 2.6.32? How can I do this? It seems kernel developers want to remove LSM from future kernel.

   

     2. Can Dazuko catch execve events with RedirFS on kernel 2.6.32?

 

     Looking forward to your suggestions.

 

Thanks a lot,

Errik