Re: [RFC] 2.4.11-pre4 patch

From: Chris Wright (chrisat_private)
Date: Mon Oct 08 2001 - 14:04:31 PDT

  • Next message: jmjonesat_private: "Re: [RFC] 2.4.11-pre4 patch"

    * jmjonesat_private (jmjonesat_private) wrote:
    > 
    > I still don't think it's necessary to be able to extricate LSM *if* it is
    > part of the actual kernel tree.  The cost for the dummy calls is just not
    > that high (a sign, IMHO, that the "minimal impact" objective has been well
    > addressed.)  They also are located in many interesting spots, and may have
    > uses other than the claimed purpose.
    
    you can be sure some people will complain about any negative impact.  we may
    be sold that lsm overhead is not unreasonable, but if the overhead
    becomes an issue for acceptance we will have to address it.
    
    > On a more hopefully helpful note, would it be acceptable to build a
    > conditional that converts the hooks containing logic in the dummy/capable
    > module to direct calls to the relocated code in one swoop DIRECTLY,
    > without the indirection of the security_ops structure, or is it
    > necessary to put that logic BACK on the "flip of a switch."?
    > 
    > #ifndef LSM_OUT
    > #then
    >   hook(...)
    > #else
    >   cap_hook(...)
    > #endif
    
    this is what i was talking about.  this is less trivial than lsm on/off
    because it has dependencies on the capabilities module code.  it isn't
    the end of the world, it's just more difficult to get right, that's all.
    ;-)
    
    -chris
    
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