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Subject[PATCH] mtd: rawnand: renesas: Annotate struct rnand_chip with __counted_by
Date
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 rnand_chip.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-mtd@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/mtd/nand/raw/renesas-nand-controller.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/renesas-nand-controller.c b/drivers/mtd/nand/raw/renesas-nand-controller.c
index 589021ea9eb2..c9a01feff8df 100644
--- a/drivers/mtd/nand/raw/renesas-nand-controller.c
+++ b/drivers/mtd/nand/raw/renesas-nand-controller.c
@@ -210,7 +210,7 @@ struct rnand_chip {
u32 tim_gen_seq1;
u32 tim_gen_seq2;
u32 tim_gen_seq3;
- struct rnand_chip_sel sels[];
+ struct rnand_chip_sel sels[] __counted_by(nsels);
};

struct rnandc {
--
2.34.1
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