From a1b8188791004839aa985b18bb3b265875ff8073 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Wed, 23 Sep 2026 04:28:25 +0000 Subject: [PATCH] iio: add __counted_by_ptr attribute to channels in struct iio_dev 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 Reviewed-by: Gustavo A. R. Silva Signed-off-by: Jonathan Cameron --- include/linux/iio/iio.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 7c751e117ccc..4b16049e615a 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -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;