Commit 6260ecd0 authored by Kees Cook's avatar Kees Cook Committed by Thomas Gleixner
Browse files

irqdomain: Annotate struct irq_domain 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 irq_domain.

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



Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922175127.work.214-kees@kernel.org
parent 0bb80ecc

include/linux/irqdomain.h

+1 −1
Original line number Diff line number Diff line
@@ -174,7 +174,7 @@ struct irq_domain { 
	irq_hw_number_t			hwirq_max;

	unsigned int			revmap_size;

	struct radix_tree_root		revmap_tree;

	struct irq_data __rcu		*revmap[];

	struct irq_data __rcu		*revmap[] __counted_by(revmap_size);

};



/* Irq domain flags */