Re: Possible system call interface for LSM

From: Stephen Smalley (sdsat_private)
Date: Fri Aug 10 2001 - 05:36:44 PDT

  • Next message: Stephen Smalley: "Re: Possible system call interface for LSM"

    On Thu, 9 Aug 2001, richard offer wrote:
    
    > Its only common for those policies like SELinux that use system call
    > interposition. How common is this method ? I don't know.
    
    Just to clarify, it isn't precisely system call interposition -
    we aren't interposing on the existing system calls, but we
    are re-using the implementations of those calls to implement
    new system calls with enhanced functionality for security-aware
    applications.  Providing calls like stat_secure, mkdir_secure,
    execve_secure, ... allows for applications to be easily changed
    to explicitly specify security labels when desired (although
    default behaviors are defined when the ordinary calls are used,
    naturally).
    
    --
    Stephen D. Smalley, NAI Labs
    ssmalleyat_private
    
    
    
    
    
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