git: 1ee910875cd0 - releng/13.3 - sched_setscheduler(2): Change realtime privilege check
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Date: Wed, 14 Feb 2024 18:21:06 UTC
The branch releng/13.3 has been updated by olce: URL: https://cgit.FreeBSD.org/src/commit/?id=1ee910875cd00c6f86f3f64dbc1686ec6d52ab11 commit 1ee910875cd00c6f86f3f64dbc1686ec6d52ab11 Author: Florian Walpen <dev@submerge.ch> AuthorDate: 2024-02-14 13:50:44 +0000 Commit: Olivier Certner <olce@FreeBSD.org> CommitDate: 2024-02-14 18:19:04 +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) (cherry picked from commit 8ff01d01f2e8894bbac9f179f1ab0e83a8160384) Approved by: emaste (mentor) Approved by: re (cperciva) --- sys/kern/p1003_1b.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/kern/p1003_1b.c b/sys/kern/p1003_1b.c index 21c9e3a27039..6259f7092487 100644 --- a/sys/kern/p1003_1b.c +++ b/sys/kern/p1003_1b.c @@ -233,8 +233,8 @@ kern_sched_setscheduler(struct thread *td, struct thread *targettd, targetp = targettd->td_proc; PROC_LOCK_ASSERT(targetp, MA_OWNED); - /* Don't allow non root user to set a scheduler policy. */ - error = priv_check(td, PRIV_SCHED_SET); + /* Only privileged users are allowed to set a scheduler policy. */ + error = priv_check(td, PRIV_SCHED_SETPOLICY); if (error) return (error);