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 denali_chip. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Miquel Raynal <miquel.ray...@bootlin.com> Cc: Richard Weinberger <rich...@nod.at> Cc: Vignesh Raghavendra <vigne...@ti.com> Cc: linux-...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/mtd/nand/raw/denali.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/denali.h b/drivers/mtd/nand/raw/denali.h index ac46eb7956ce..5f2fab022fc5 100644 --- a/drivers/mtd/nand/raw/denali.h +++ b/drivers/mtd/nand/raw/denali.h @@ -328,7 +328,7 @@ struct denali_chip { struct nand_chip chip; struct list_head node; unsigned int nsels; - struct denali_chip_sel sels[]; + struct denali_chip_sel sels[] __counted_by(nsels); }; /** -- 2.34.1
