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iio: bmp280: zero-init buffer

Zero-initialize the buffer used with iio_push_to_buffers_with_ts(). The
struct used for the buffer has holes in it, so we need to make sure that
the holes are zeroed out rather than containing uninitialized data from
the stack.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-iio/aBoBR5D1UMjsSUfZ@stanley.mountain/
Fixes: 872c8014e05e ("iio: pressure: bmp280: drop sensor_data array")
Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250506-iio-pressure-bmp280-zero-init-buffer-v1-1-0935c31558ac@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

authored by

David Lechner and committed by
Jonathan Cameron 018f5090 ed7a1e88

+3
+3
drivers/iio/pressure/bmp280-core.c
··· 1237 1237 } buffer; 1238 1238 int ret; 1239 1239 1240 + /* Don't leak uninitialized stack to userspace. */ 1241 + memset(&buffer, 0, sizeof(buffer)); 1242 + 1240 1243 guard(mutex)(&data->lock); 1241 1244 1242 1245 /* Burst read data registers */