From 79c610ab40ec57de5d36acc2b72d28f7d46cdbf8 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 15 Sep 2023 13:12:20 -0700 Subject: [PATCH] mtd: rawnand: atmel: Annotate struct atmel_nand with __counted_by 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 atmel_nand. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Tudor Ambarus Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: Nicolas Ferre Cc: Alexandre Belloni Cc: Claudiu Beznea Cc: linux-mtd@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Tudor Ambarus Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230915201219.never.352-kees@kernel.org --- drivers/mtd/nand/raw/atmel/nand-controller.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/atmel/nand-controller.c b/drivers/mtd/nand/raw/atmel/nand-controller.c index 3f494f7c7ecbd..4cb478bbee4a4 100644 --- a/drivers/mtd/nand/raw/atmel/nand-controller.c +++ b/drivers/mtd/nand/raw/atmel/nand-controller.c @@ -165,7 +165,7 @@ struct atmel_nand { struct atmel_pmecc_user *pmecc; struct gpio_desc *cdgpio; int numcs; - struct atmel_nand_cs cs[]; + struct atmel_nand_cs cs[] __counted_by(numcs); }; static inline struct atmel_nand *to_atmel_nand(struct nand_chip *chip) -- 2.30.2