5.15-stable review patch. If anyone has any objections, please let me know.
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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... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Stable-dep-of: 466f7a2fef2a ("iio: imu: inv_icm42600: Avoid configuring if already pm_runtime suspended") 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 @@ -749,7 +749,8 @@ 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) { @@ -768,8 +769,6 @@ int inv_icm42600_accel_parse_fifo(struct inv_icm42600_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 @@ -761,7 +761,8 @@ 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) { @@ -780,8 +781,6 @@ int inv_icm42600_gyro_parse_fifo(struct inv_icm42600_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;