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Fri, 28 Aug 2026 09:14:05 -0700 Date: Fri, 28 Aug 2026 09:14:06 -0700 From: Nicolin Chen To: Mostafa Saleh CC: , , , , , , , Subject: Re: [PATCH 6/7] iommu/arm-smmu-v3-test: Fix OOB in arm_smmu_v3_invs_test_verify() Message-ID: References: <20260828125409.1921538-1-smostafa@google.com> <20260828125409.1921538-7-smostafa@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20260828125409.1921538-7-smostafa@google.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002BA4E:EE_|SN7PR12MB6958:EE_ X-MS-Office365-Filtering-Correlation-Id: 440d5c61-1f3f-4c24-f744-08df051f73b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|36860700016|23010399003|18002099003|56012099006|10067099003|6133799003|22082099003|11063799006|4143699003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(82310400026)(376014)(36860700016)(23010399003)(18002099003)(56012099006)(10067099003)(6133799003)(22082099003)(11063799006)(4143699003);DIR:OUT;SFP:1101; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Aug 28, 2026 at 12:53:41PM +0000, Mostafa Saleh wrote: > arm_smmu_v3_invs_test_verify() validates the array bounds using > KUNIT_EXPECT_EQ(), which triggers a failure and continues execution. > If invs->num_invs was smaller than expected, the next loop over > num_invs would blindly read past the end of the invs->inv[] array. > Switch to KUNIT_ASSERT_EQ() to fail and stop the test on bound errors. > > Fixes: 15a2a5645ad7 ("iommu/arm-smmu-v3: Introduce a per-domain arm_smmu_invs array") > Reported-by: Sashiko <> > Signed-off-by: Mostafa Saleh Reviewed-by: Nicolin Chen