Re: [PATCH] mtd: rawnand: atmel: Annotate struct atmel_nand with __counted_by
On 9/15/23 14:12, Kees Cook wrote: 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-...@lists.infradead.org Cc: linux-arm-ker...@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo --- 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 3f494f7c7ecb..4cb478bbee4a 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)
[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-...@lists.infradead.org Cc: linux-arm-ker...@lists.infradead.org Signed-off-by: Kees Cook --- 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 3f494f7c7ecb..4cb478bbee4a 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) -- 2.34.1