From owner-cvs-all  Thu Apr 12 15:46:12 2001
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From: Robert Watson <rwatson@FreeBSD.org>
Date: Thu, 12 Apr 2001 15:46:07 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern kern_prot.c
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rwatson     2001/04/12 15:46:07 PDT

  Modified files:
    sys/kern             kern_prot.c 
  Log:
  o Disable two "allow this" exceptions in p_cansched()m retricting the
    ability of unprivileged processes to modify the scheduling properties
    of daemons temporarily taking on unprivileged effective credentials.
    These cases (p1->p_cred->p_ruid == p2->p_ucred->cr_uid) and
    (p1->p_ucred->cr_uid == p2->p_ucred->cr_uid), respectively permitting
    a subject process to influence the scheduling of a daemon if the subject
    process has the same real uid or effective uid as the daemon's effective
    uid.  This removes a number of the warning cases identified by the
    proc_to_proc iner-process authorization regression test.
  o As these are new restrictions, we'll have to watch out carefully for
    possible side effects on running code: they seem reasonable to me,
    but it's possible this change might have to be backed out if problems
    are experienced.
  
  Reported by:	src/tools/regression/security/proc_to_proc/testuid
  Obtained from:	TrustedBSD Project
  
  Revision  Changes    Path
  1.82      +5 -2      src/sys/kern/kern_prot.c


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