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iio: add __counted_by_ptr attribute to channels in struct iio_dev

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In 'struct iio_dev', the 'channels' pointer refers to an array of IIO
channel specifications ('struct iio_chan_spec const'), and the size of
this array is tracked by the 'num_channels' field within the same
struct.

Applying the '__counted_by_ptr' attribute to 'channels' allows KASAN
and compiler-based bounds checkers to verify that accesses to 'channels'
remain within bounds at runtime.

Cc: codemender-patching+linux@google.com
Assisted-by: LLM
Signed-off-by: Bill Wendling <morbo@google.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Bill Wendling 2026-09-23 04:28:25 +00:00 committed by Jonathan Cameron
parent 525b772be2
commit a1b8188791
1 changed files with 1 additions and 1 deletions
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2
include/linux/iio/iio.h
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@ -660,7 +660,7 @@ struct iio_dev {
struct iio_poll_func *pollfunc;
struct iio_poll_func *pollfunc_event;
struct iio_chan_spec const *channels;
struct iio_chan_spec const *channels __counted_by_ptr(num_channels);
int num_channels;
const char *name;