[Bug 276962] mac_priority(4) doesn't affect sched_setscheduler(2)

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 14 Feb 2024 18:19:01 UTC

--- Comment #4 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:


commit 8ff01d01f2e8894bbac9f179f1ab0e83a8160384
Author:     Florian Walpen <dev@submerge.ch>
AuthorDate: 2024-02-14 13:50:44 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2024-02-14 18:17:14 +0000

    sched_setscheduler(2): Change realtime privilege check

    Check for privilege PRIV_SCHED_SETPOLICY instead of PRIV_SCHED_SET, to
    at least make it coherent with what is done at thread creation when
    a realtime policy is requested, and have users authorized by
    mac_priority(4) pass it.

    This change is good enough in practice since it only allows 'root' (as
    before) and mac_priority(4)'s authorized users in (the point of this
    change), without other side effects.  More changes in this area, to
    generally ensure that all privilege checks are consistent, are going to
    come as olce's priority revamp project lands.

    (olce: Expanded the explanations.)

    PR:                     276962
    Reported by:            jbeich
    Reviewed by:            olce
    Approved by:            emaste (mentor)
    MFC after:              3 days
    Differential Revision:  https://reviews.freebsd.org/D43835

    (cherry picked from commit 2198221bd9df0ceb69945120bc477309a5729241)

    Approved by:            emaste (mentor)
    Approved by:            re (cperciva)

 sys/kern/p1003_1b.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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