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b=I53C4YQbxRQ0OusH7DKek5u5dZjp7zmIp91H4S8/acKLFFXG8INbdrfH31MXscm5eUvMCM28mQFO4m6XS/k5F7FpeQsl0rQbTYoYG1Jblce3z6JkBkVpOvzwBDS4nNA8pI1qKedeIVMeavhS80SqJwYzU8uYKJ7hgP9Xp/E64hstYltxW/HBOOk82Eowj3Nch98E7gljSah2zvUlklGUyCFFb17hT5PFruhI9HoY+Hog4db+oAKoHiQCMhfP8JUJtlVI9tSeLlG7r5px8Q2AzqzqJb25elRqarE44AXR4RshqxI4u/KNkhu7hL0hilypR+zw5dp0PWMkZKOmIcGnZw== From: Oleksii Moisieiev To: "xen-devel@lists.xenproject.org" CC: Dario Faggioli , George Dunlap , Juergen Gross , Meng Xu , Oleksii Moisieiev Subject: [PATCH] xen/sched: validate RTDS putinfo period and budget Thread-Topic: [PATCH] xen/sched: validate RTDS putinfo period and budget Thread-Index: AQHcvDvK8gNVwMujB0ygdi3PmK3CFw== Date: Wed, 25 Mar 2026 09:43:10 +0000 Message-ID: <1a235cca6f37ee3d3f03132675247edfc19953cd.1774431761.git.oleksii_moisieiev@epam.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=epam.com; 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charset="utf-8" The RTDS domain-wide XEN_DOMCTL_SCHEDOP_putinfo path only checks for zero values before applying period and budget to all vCPUs in the domain. This is weaker than the per-vCPU XEN_DOMCTL_SCHEDOP_putvcpuinfo path, which already rejects values below the minimum, above the maximum, and cases where budget exceeds period. Use the same validation rules for putinfo as for putvcpuinfo, so invalid domain-wide updates are rejected with -EINVAL instead of being applied inconsistently. Signed-off-by: Oleksii Moisieiev --- xen/common/sched/rt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/xen/common/sched/rt.c b/xen/common/sched/rt.c index 7b1f64a779..62188f37c6 100644 --- a/xen/common/sched/rt.c +++ b/xen/common/sched/rt.c @@ -1388,7 +1388,10 @@ rt_dom_cntl( op->u.rtds.budget =3D RTDS_DEFAULT_BUDGET / MICROSECS(1); break; case XEN_DOMCTL_SCHEDOP_putinfo: - if ( op->u.rtds.period =3D=3D 0 || op->u.rtds.budget =3D=3D 0 ) + if ( op->u.rtds.period > RTDS_MAX_PERIOD || + op->u.rtds.budget < RTDS_MIN_BUDGET || + op->u.rtds.budget > op->u.rtds.period || + op->u.rtds.period < RTDS_MIN_PERIOD ) { rc =3D -EINVAL; break; --=20 2.43.0 base-commit: a7bf8ff218ca05eb3674fdfd2817f6cff471e96a branch: amoi_rtds_SCHEDOP_putinfo