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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39d98e60484sm19488728a91.4.2026.09.14.02.39.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2026 02:39:44 -0700 (PDT) From: Yin Li Date: Mon, 14 Sep 2026 17:37:49 +0800 Subject: [PATCH RFC v2 01/10] arm_mpam: Fix the RIS index range check in mpam_ris_create_locked Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260914-mpam-resctrl-dt-knp-support-v2-1-bf6645bb2f65@oss.qualcomm.com> References: <20260914-mpam-resctrl-dt-knp-support-v2-0-bf6645bb2f65@oss.qualcomm.com> In-Reply-To: <20260914-mpam-resctrl-dt-knp-support-v2-0-bf6645bb2f65@oss.qualcomm.com> To: James Morse , Rob Herring , Shanker Donthineni , Ben Horgan , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Greg Kroah-Hartman , "Rafael J. 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MPAM_MSC_MAX_NUM_RIS is defined as 16, so the check should use >= to reject index 16 and above. The previous > check incorrectly accepted index 16 as valid. Fixes: 01fb4b822472 ("arm_mpam: Add the class and component structures for firmware described ris") Signed-off-by: Yin Li Reviewed-by: Andre Przywara --- drivers/resctrl/mpam_devices.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c index dd422c56fbb1..6da217abf689 100644 --- a/drivers/resctrl/mpam_devices.c +++ b/drivers/resctrl/mpam_devices.c @@ -552,7 +552,7 @@ static int mpam_ris_create_locked(struct mpam_msc *msc, u8 ris_idx, lockdep_assert_held(&mpam_list_lock); - if (ris_idx > MPAM_MSC_MAX_NUM_RIS) + if (ris_idx >= MPAM_MSC_MAX_NUM_RIS) return -EINVAL; if (test_and_set_bit(ris_idx, &msc->ris_idxs)) -- 2.34.1