From: Kees Cook Date: Fri, 23 Feb 2024 17:29:39 +0000 (-0800) Subject: iio: pressure: dlhl60d: Initialize empty DLH bytes X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a1c9f508db2543aae59ea2378b07a026f6c917cf;p=linux.git iio: pressure: dlhl60d: Initialize empty DLH bytes 3 bytes were being read but 4 were being written. Explicitly initialize the unused bytes to 0 and refactor the loop to use direct array indexing, which appears to silence a Clang false positive warning[1]. Indent improvement included for readability of the fixed code. Link: https://github.com/ClangBuiltLinux/linux/issues/2000 [1] Fixes: ac78c6aa4a5d ("iio: pressure: Add driver for DLH pressure sensors") Signed-off-by: Kees Cook Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20240223172936.it.875-kees@kernel.org Cc: Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/pressure/dlhl60d.c b/drivers/iio/pressure/dlhl60d.c index 28c8269ba65d3..0bba4c5a8d405 100644 --- a/drivers/iio/pressure/dlhl60d.c +++ b/drivers/iio/pressure/dlhl60d.c @@ -250,18 +250,17 @@ static irqreturn_t dlh_trigger_handler(int irq, void *private) struct dlh_state *st = iio_priv(indio_dev); int ret; unsigned int chn, i = 0; - __be32 tmp_buf[2]; + __be32 tmp_buf[2] = { }; ret = dlh_start_capture_and_read(st); if (ret) goto out; for_each_set_bit(chn, indio_dev->active_scan_mask, - indio_dev->masklength) { - memcpy(tmp_buf + i, + indio_dev->masklength) { + memcpy(&tmp_buf[i++], &st->rx_buf[1] + chn * DLH_NUM_DATA_BYTES, DLH_NUM_DATA_BYTES); - i++; } iio_push_to_buffers(indio_dev, tmp_buf);