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Tue, 05 Nov 2024 08:55:43 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4A58tg6M001158 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 5 Nov 2024 08:55:42 GMT Received: from hu-vgarodia-hyd.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 5 Nov 2024 00:55:39 -0800 From: Vikash Garodia Date: Tue, 5 Nov 2024 14:24:55 +0530 Subject: [PATCH 2/4] media: venus: hfi_parser: avoid OOB access beyond payload word count 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: quoted-printable Message-ID: <20241105-venus_oob-v1-2-8d4feedfe2bb@quicinc.com> References: <20241105-venus_oob-v1-0-8d4feedfe2bb@quicinc.com> In-Reply-To: <20241105-venus_oob-v1-0-8d4feedfe2bb@quicinc.com> To: Stanimir Varbanov , Bryan O'Donoghue , Mauro Carvalho Chehab CC: , , , Vikash Garodia , X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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When words_count reaches last word, data can access memory beyond the total payload. Avoid this case by not allowing the loop for the last word count. Cc: stable@vger.kernel.org Fixes: 1a73374a04e5 ("media: venus: hfi_parser: add common capability parse= r") Signed-off-by: Vikash Garodia --- drivers/media/platform/qcom/venus/hfi_parser.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/qcom/venus/hfi_parser.c b/drivers/media= /platform/qcom/venus/hfi_parser.c index 27d0172294d5154f4839e8cef172f9a619dfa305..20d9ea3626e9c4468d5f7dbd678= 743135f027c86 100644 --- a/drivers/media/platform/qcom/venus/hfi_parser.c +++ b/drivers/media/platform/qcom/venus/hfi_parser.c @@ -303,7 +303,7 @@ u32 hfi_parser(struct venus_core *core, struct venus_in= st *inst, void *buf, memset(core->caps, 0, sizeof(core->caps)); } =20 - while (words_count) { + while (words_count > 1) { data =3D word + 1; =20 switch (*word) { --=20 2.34.1