From 787650cc335201a0489905c5504a9179470ebc51 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 13 Oct 2023 20:04:12 -0700 Subject: [PATCH] Input: Annotate struct ff_device 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 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 ff_device. Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20231006201739.work.350-kees@kernel.org Signed-off-by: Dmitry Torokhov --- include/linux/input.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/input.h b/include/linux/input.h index 49790c1bd2c4..de6503c0edb8 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -562,7 +562,7 @@ struct ff_device { int max_effects; struct ff_effect *effects; - struct file *effect_owners[]; + struct file *effect_owners[] __counted_by(max_effects); }; int input_ff_create(struct input_dev *dev, unsigned int max_effects);