Date: Thu, 12 Apr 2001 15:46:07 -0700 (PDT) From: Robert Watson <rwatson@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_prot.c Message-ID: <200104122246.f3CMk7158693@freefall.freebsd.org>
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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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