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Sat, 27 Dec 2025 02:28:40 -0800 (PST) Received: from localhost.localdomain ([176.33.65.121]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-59b2958aae1sm3054055e87.41.2025.12.27.02.28.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 27 Dec 2025 02:28:38 -0800 (PST) From: Alper Ak To: hverkuil@kernel.org, mchehab@kernel.org Cc: Alper Ak , Robert Foss , Todor Tomov , "Bryan O'Donoghue" , Vladimir Zapolskiy , Jonathan Marek , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update() Date: Sat, 27 Dec 2025 13:24:41 +0300 Message-ID: <20251227102442.44989-1-alperyasinak1@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" vfe_isr() iterates using MSM_VFE_IMAGE_MASTERS_NUM(7) as the loop bound and passes the index to vfe_isr_reg_update(). However, vfe->line[] array is defined with VFE_LINE_NUM_MAX(4): struct vfe_line line[VFE_LINE_NUM_MAX]; When index is 4, 5, 6, the access to vfe->line[line_id] exceeds the array bounds and resulting in out-of-bounds memory access. Add a bounds check to ensure line_id is within valid range before accessing the array. Fixes: 4edc8eae715c ("media: camss: Add initial support for VFE hardware ve= rsion Titan 480") Signed-off-by: Alper Ak --- drivers/media/platform/qcom/camss/camss-vfe-480.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/platform/qcom/camss/camss-vfe-480.c b/drivers/me= dia/platform/qcom/camss/camss-vfe-480.c index 4feea590a47b..fac111135c78 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe-480.c +++ b/drivers/media/platform/qcom/camss/camss-vfe-480.c @@ -237,6 +237,9 @@ static void vfe_isr_reg_update(struct vfe_device *vfe, = enum vfe_line_id line_id) struct vfe_output *output; unsigned long flags; =20 + if (line_id >=3D VFE_LINE_NUM_MAX) + return; + spin_lock_irqsave(&vfe->output_lock, flags); vfe_reg_update_clear(vfe, line_id); =20 --=20 2.43.0