From 69c3f9154553c22066108427eb24d94f1645551b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:53:38 -0700 Subject: [PATCH] mfd: iqs62x: Annotate struct iqs62x_fw_blk 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 iqs62x_fw_blk. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230922175337.work.150-kees@kernel.org Signed-off-by: Lee Jones --- drivers/mfd/iqs62x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/iqs62x.c b/drivers/mfd/iqs62x.c index e03b4d38fbb0a..1b465590567cf 100644 --- a/drivers/mfd/iqs62x.c +++ b/drivers/mfd/iqs62x.c @@ -96,7 +96,7 @@ struct iqs62x_fw_blk { u8 addr; u8 mask; u8 len; - u8 data[]; + u8 data[] __counted_by(len); }; struct iqs62x_info { -- 2.30.2