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iio: chemical: scd30: fix division by zero in write_raw

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Add a zero check for val2 before using it as a divisor when setting the
sampling frequency. A user writing a zero fractional part to the
sampling_frequency sysfs attribute triggers a division by zero in the
kernel.

Fixes: 64b3d8b1b0 ("iio: chemical: scd30: add core driver")
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Antoniu Miclaus 2026-04-01 14:08:29 +03:00 committed by Jonathan Cameron
parent 0d42e2c0bd
commit 5aba4f94b2
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/chemical/scd30_core.c
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@ -256,7 +256,7 @@ static int scd30_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const
guard(mutex)(&state->lock);
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
if (val)
if (val || !val2)
return -EINVAL;
val = 1000000000 / val2;