On Wed, 23 Sep 2026 19:24:50 +0000 Bill Wendling <[email protected]> wrote:
> The compiler attribute __counted_by_ptr can be used by KASAN and UBSAN > to detect out-of-bounds accesses to pointer fields in structs where a > corresponding element count field is available. > > In "struct iio_gts", there are multiple pointer fields associated with > an element count. This patch annotates these pointer fields with > "__counted_by_ptr" to improve runtime safety: > > - 'hwgain_table': counted by 'num_hwgain' > - 'itime_table': counted by 'num_itime' > - 'per_time_avail_scale_tables': counted by 'num_itime' > - 'avail_all_scales_table': counted by 'num_avail_all_scales' > - 'avail_time_tables': counted by 'num_avail_time_tables' > > To ensure that the count is set correctly before any pointer is > accessed or assigned, we update "iio_init_iio_gts()" to set the counts > prior to assigning the pointers. > > Cc: [email protected] > Assisted-by: LLM > Signed-off-by: Bill Wendling <[email protected]> > Acked-by: Matti Vaittinen <[email protected]> > Reviewed-by: Gustavo A. R. Silva <[email protected]> Applied to the testing branch of iio.git. So effectively queued for 7.4 merge window. Thanks, Jonathan
