PERFORCE change 15347 for review

[Brian F. Feldman]

John Baldwin <jhb at FreeBSD.org> wrote:
> 
> On 31-Jul-2002 Brian Feldman wrote:
> > http://people.freebsd.org/~peter/p4db/chv.cgi?CH=15347
> > 
> > Change 15347 by green at green_laptop_2 on 2002/07/31 14:31:24
> > 
> >       mac_cred_canexec() no longer exists; use mac_check_vnode_exec().
> 
> Dropping the proc lock invalidates the credential changes and any
> earlier credential changes you just made unless you ensure that the
> process is single threaded before you do any of the credential
> checks and before you get here.

This is something that needs to be fixed by people that understand teh KSE 
stuff by, like you said, ensuring that the process is single-threaded here.  
That should be the very first thing exec does...  I personally had no idea 
whether it should return an error, destroy all the other threads, fork off a 
new process surreptititiously (eek!), or whatever else could possibly be the 
answer for it.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org  <> bfeldman at tislabs.com      \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\


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