queue-6.6/iio-imu-inv_icm42600-use-instead-of-memset.patch

From stable+bounces-172741-greg=kroah.com@vger.kernel.org Sun Aug 24 15:53:39 2025
From: Sasha Levin <sashal@kernel.org>
Date: Sun, 24 Aug 2025 09:53:25 -0400
Subject: iio: imu: inv_icm42600: use = { } instead of memset()
To: stable@vger.kernel.org
Cc: "David Lechner" <dlechner@baylibre.com>, "Nuno Sá" <nuno.sa@analog.com>, "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>, "Jonathan Cameron" <Jonathan.Cameron@huawei.com>, "Sasha Levin" <sashal@kernel.org>
Message-ID: <20250824135327.2919985-2-sashal@kernel.org>

From: David Lechner <dlechner@baylibre.com>

[ Upstream commit 352112e2d9aab6a156c2803ae14eb89a9fd93b7d ]

Use { } instead of memset() to zero-initialize stack memory to simplify
the code.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-zero-init-stack-with-instead-of-memset-v1-16-ebb2d0a24302@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Stable-dep-of: dfdc31e7ccf3 ("iio: imu: inv_icm42600: change invalid data error to -EBUSY")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c |    5 ++---
 drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c  |    5 ++---
 2 files changed, 4 insertions(+), 6 deletions(-)

--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_accel.c
@@ -755,7 +755,8 @@ int inv_icm42600_accel_parse_fifo(struct
 	const int8_t *temp;
 	unsigned int odr;
 	int64_t ts_val;
-	struct inv_icm42600_accel_buffer buffer;
+	/* buffer is copied to userspace, zeroing it to avoid any data leak */
+	struct inv_icm42600_accel_buffer buffer = { };
 
 	/* parse all fifo packets */
 	for (i = 0, no = 0; i < st->fifo.count; i += size, ++no) {
@@ -774,8 +775,6 @@ int inv_icm42600_accel_parse_fifo(struct
 			inv_sensors_timestamp_apply_odr(ts, st->fifo.period,
 							st->fifo.nb.total, no);
 
-		/* buffer is copied to userspace, zeroing it to avoid any data leak */
-		memset(&buffer, 0, sizeof(buffer));
 		memcpy(&buffer.accel, accel, sizeof(buffer.accel));
 		/* convert 8 bits FIFO temperature in high resolution format */
 		buffer.temp = temp ? (*temp * 64) : 0;
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_gyro.c
@@ -767,7 +767,8 @@ int inv_icm42600_gyro_parse_fifo(struct
 	const int8_t *temp;
 	unsigned int odr;
 	int64_t ts_val;
-	struct inv_icm42600_gyro_buffer buffer;
+	/* buffer is copied to userspace, zeroing it to avoid any data leak */
+	struct inv_icm42600_gyro_buffer buffer = { };
 
 	/* parse all fifo packets */
 	for (i = 0, no = 0; i < st->fifo.count; i += size, ++no) {
@@ -786,8 +787,6 @@ int inv_icm42600_gyro_parse_fifo(struct
 			inv_sensors_timestamp_apply_odr(ts, st->fifo.period,
 							st->fifo.nb.total, no);
 
-		/* buffer is copied to userspace, zeroing it to avoid any data leak */
-		memset(&buffer, 0, sizeof(buffer));
 		memcpy(&buffer.gyro, gyro, sizeof(buffer.gyro));
 		/* convert 8 bits FIFO temperature in high resolution format */
 		buffer.temp = temp ? (*temp * 64) : 0;