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Wed, 11 Feb 2026 22:31:12 -0800 (PST) From: Yasin Lee Date: Thu, 12 Feb 2026 14:26:52 +0800 Subject: [PATCH v2 1/4] iio: proximity: hx9023s: fix out-of-bounds access when copying firmware 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: <20260212-upstream-20260219-v2-1-2b28fce5d09e@gmail.com> References: <20260212-upstream-20260219-v2-0-2b28fce5d09e@gmail.com> In-Reply-To: <20260212-upstream-20260219-v2-0-2b28fce5d09e@gmail.com> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , yasin.lee.x@outlook.com Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Yasin Lee X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1033; i=yasin.lee.x@gmail.com; h=from:subject:message-id; bh=EBFLOEJADpoTiNro5GpxLUVSOG8AoEttij+vms0hlDo=; b=owGbwMvMwCEYyfeRr6Zs90zG02pJDJm9xUtLXksv4T6UWGju81bUMdpsZvnHnP/TLqxU/R0id pyDO76ro5SFQZCDQVZMkeXM6zes+aoP9wT/ds2AmcPKBDKEgYtTACbifIzhr/hdDZc09XkaghM2 qiQvt8+2Y08S27zMauPMbLdp5zWL1jEyNPPxmy+w+TdF68KOeXqzc6wb718R/fRxrYjyn8dSvb9 ZXgMA X-Developer-Key: i=yasin.lee.x@gmail.com; a=openpgp; fpr=CCEBEC056F25E1BC53FB4568590EF10E7C76BB99 Initialize fw_size before copying firmware data into the flexible array member to match the __counted_by() annotation. This fixes a potential out-of-bounds access that could lead to a kernel crash. Fixes: e9ed97be4fcc ("iio: proximity: hx9023s: Added firmware file parsing = functionality") Signed-off-by: Yasin Lee Reviewed-by: Andy Shevchenko --- drivers/iio/proximity/hx9023s.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/iio/proximity/hx9023s.c b/drivers/iio/proximity/hx9023= s.c index 2918dfc0df54..ad839db6b326 100644 --- a/drivers/iio/proximity/hx9023s.c +++ b/drivers/iio/proximity/hx9023s.c @@ -1034,9 +1034,8 @@ static int hx9023s_send_cfg(const struct firmware *fw= , struct hx9023s_data *data if (!bin) return -ENOMEM; =20 - memcpy(bin->data, fw->data, fw->size); - bin->fw_size =3D fw->size; + memcpy(bin->data, fw->data, bin->fw_size); bin->fw_ver =3D bin->data[FW_VER_OFFSET]; bin->reg_count =3D get_unaligned_le16(bin->data + FW_REG_CNT_OFFSET); =20 --=20 2.43.0 From nobody Sat Apr 18 01:57:39 2026 Received: from mail-dy1-f173.google.com (mail-dy1-f173.google.com [74.125.82.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2887829DB6A for ; 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a=openpgp-sha256; l=1101; i=yasin.lee.x@gmail.com; h=from:subject:message-id; bh=Cwukr+asA9q81opMyHdC2mH8rdLJNfh+2ybtKX0oQjI=; b=owGbwMvMwCEYyfeRr6Zs90zG02pJDJm9xUv3Fbw7OM2UdZHq3f1/nSuOZxhNDl6hGqn6r+74+ zWlYmV3O0pZGAQ5GGTFFFnOvH7Dmq/6cE/wb9cMmDmsTCBDGLg4BWAiK/gYGebGVTctVqyfdy65 OcVsQ5qbk5KAv/Gls1uyFuUw7p6p/JOR4XzdzdQ1tvZXu32Wy6lcunP2463oFa+/ST3srFNMm22 qGg4A X-Developer-Key: i=yasin.lee.x@gmail.com; a=openpgp; fpr=CCEBEC056F25E1BC53FB4568590EF10E7C76BB99 Avoid division by zero when sampling frequency is unspecified by falling back to a default 100ms sampling period. Fixes: 60df548277b7 ("iio: proximity: Add driver support for TYHX's HX9023S= capacitive proximity sensor") Signed-off-by: Yasin Lee --- drivers/iio/proximity/hx9023s.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iio/proximity/hx9023s.c b/drivers/iio/proximity/hx9023= s.c index ad839db6b326..e714fe00a44e 100644 --- a/drivers/iio/proximity/hx9023s.c +++ b/drivers/iio/proximity/hx9023s.c @@ -719,7 +719,11 @@ static int hx9023s_set_samp_freq(struct hx9023s_data *= data, int val, int val2) struct device *dev =3D regmap_get_device(data->regmap); unsigned int i, period_ms; =20 - period_ms =3D div_u64(NANO, (val * MEGA + val2)); + if (val || val2) + period_ms =3D div_u64(NANO, (val * MEGA + val2)); + else + /* Fallback to a safe default sampling period */ + period_ms =3D 100; =20 for (i =3D 0; i < ARRAY_SIZE(hx9023s_samp_freq_table); i++) { if (period_ms =3D=3D hx9023s_samp_freq_table[i]) --=20 2.43.0 From nobody Sat Apr 18 01:57:39 2026 Received: from mail-dy1-f173.google.com (mail-dy1-f173.google.com [74.125.82.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B412A2BD580 for ; 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Signed-off-by: Yasin Lee --- Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.y= aml b/Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.yaml index 64ce8bc8bd36..cc5b5284c267 100644 --- a/Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.yaml +++ b/Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.yaml @@ -28,6 +28,9 @@ properties: =20 vdd-supply: true =20 + firmware-name: + maxItems: 1 + "#address-cells": const: 1 =20 @@ -65,6 +68,7 @@ examples: interrupt-parent =3D <&pio>; interrupts =3D <16 IRQ_TYPE_EDGE_FALLING>; vdd-supply =3D <&pp1800_prox>; + firmware-name =3D "hx9023s.bin"; =20 #address-cells =3D <1>; #size-cells =3D <0>; --=20 2.43.0 From nobody Sat Apr 18 01:57:39 2026 Received: from mail-dl1-f49.google.com (mail-dl1-f49.google.com [74.125.82.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6A5F329E0E9 for ; 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a=openpgp-sha256; l=1281; i=yasin.lee.x@gmail.com; h=from:subject:message-id; bh=LvjRu9H6aYvcvN+agPz5TpvyB/4Y1E3sFD81yavDq00=; b=owGbwMvMwCEYyfeRr6Zs90zG02pJDJm9xcuOyho8sWh98m25+tXUiz5VN7+t2Bbp4aedlxMcX m87U+VYRykLgyAHg6yYIsuZ129Y81Uf7gn+7ZoBM4eVCWQIAxenAExkExMjw4Ilc3Wvp2e8LTmt cP356+zn9jJTK7bxPL+2Y7XY6X1/V3xiZHiyIWCz6BPnozs22/x3fKvBzzbvlr+m9hHO1W2TJVn sL5QBAA== X-Developer-Key: i=yasin.lee.x@gmail.com; a=openpgp; fpr=CCEBEC056F25E1BC53FB4568590EF10E7C76BB99 Add an optional firmware-name property to specify the firmware file. If not provided, the driver falls back to the default firmware name. Signed-off-by: Yasin Lee Reviewed-by: Andy Shevchenko --- drivers/iio/proximity/hx9023s.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iio/proximity/hx9023s.c b/drivers/iio/proximity/hx9023= s.c index e714fe00a44e..b2cd0759fec2 100644 --- a/drivers/iio/proximity/hx9023s.c +++ b/drivers/iio/proximity/hx9023s.c @@ -1089,6 +1089,7 @@ static int hx9023s_probe(struct i2c_client *client) struct device *dev =3D &client->dev; struct iio_dev *indio_dev; struct hx9023s_data *data; + const char *fw_name; int ret; =20 indio_dev =3D devm_iio_device_alloc(dev, sizeof(*data)); @@ -1126,7 +1127,9 @@ static int hx9023s_probe(struct i2c_client *client) if (ret) return dev_err_probe(dev, ret, "channel config failed\n"); =20 - ret =3D request_firmware_nowait(THIS_MODULE, true, "hx9023s.bin", dev, + fw_name =3D "hx9023s.bin"; + device_property_read_string(dev, "firmware-name", &fw_name); + ret =3D request_firmware_nowait(THIS_MODULE, true, fw_name, dev, GFP_KERNEL, data, hx9023s_cfg_update); if (ret) return dev_err_probe(dev, ret, "reg config failed\n"); --=20 2.43.0