From 48ec74fd8af6d94becf6b53af0c49c888511ec38 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 15 Sep 2023 13:12:28 -0700 Subject: [PATCH] mtd: rawnand: denali: Annotate struct denali_chip 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 denali_chip. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: linux-mtd@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230915201227.never.483-kees@kernel.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); }; /**