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[213.98.130.118]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43cf21e9e18sm9945848f8f.9.2026.03.29.02.21.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 02:21:55 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: mripard@kernel.org, Pengpeng Hou Cc: paulk@sys-base.io, mchehab@kernel.org, gregkh@linuxfoundation.org, wens@kernel.org, samuel@sholland.org, nicolas.dufresne@collabora.com, linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, pengpeng@iscas.ac.cn Subject: Re: [PATCH] media: cedrus: skip invalid H.264 reference list entries Date: Sun, 29 Mar 2026 11:21:53 +0200 Message-ID: <2823210.mvXUDI8C0e@jernej-laptop> In-Reply-To: <20260324080856.56787-1-pengpeng@iscas.ac.cn> References: <20260324080856.56787-1-pengpeng@iscas.ac.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260329_022158_400217_81BDFDBF X-CRM114-Status: UNSURE ( 8.23 ) X-CRM114-Notice: Please train this message. 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 Dne torek, 24. marec 2026 ob 09:08:56 Srednjeevropski poletni =C4=8Das je P= engpeng Hou napisal(a): > Cedrus consumes H.264 ref_pic_list0/ref_pic_list1 entries from the > stateless slice control and later uses their indices to look up > decode->dpb[] in _cedrus_write_ref_list(). >=20 > Rejecting such controls in cedrus_try_ctrl() would break existing > userspace, since stateless H.264 reference lists may legitimately carry > out-of-range indices for missing references. Instead, guard the actual > DPB lookup in Cedrus and skip entries whose indices do not fit the fixed > V4L2_H264_NUM_DPB_ENTRIES array. >=20 > This keeps the fix local to the driver use site and avoids out-of-bounds > reads from malformed or unsupported reference list entries. >=20 > Signed-off-by: Pengpeng Hou Acked-by: Jernej Skrabec Best regards, Jernej