From: Kees Cook Date: Fri, 22 Sep 2023 17:51:27 +0000 (-0700) Subject: irqdomain: Annotate struct irq_domain with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6260ecd04594360ae2af104fb2641317728a66e4;p=linux.git 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: Kees Cook Signed-off-by: Thomas Gleixner Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230922175127.work.214-kees@kernel.org --- diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 51c254b7fec27..ee0a82c605083 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -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 */