Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct st_fdma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul <vkoul@xxxxxxxxxx> Cc: Patrice Chotard <patrice.chotard@xxxxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: dmaengine@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/dma/st_fdma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h index fa15b97a3bab..f296412e96b6 100644 --- a/drivers/dma/st_fdma.h +++ b/drivers/dma/st_fdma.h @@ -97,7 +97,7 @@ struct st_fdma_desc { struct st_fdma_chan *fchan; bool iscyclic; unsigned int n_nodes; - struct st_fdma_sw_node node[]; + struct st_fdma_sw_node node[] __counted_by(n_nodes); }; enum st_fdma_type { -- 2.34.1
