Commit a48e1f65 authored by Kees Cook's avatar Kees Cook
Browse files

KVM: Annotate struct kvm_irq_routing_table 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 kvm_irq_routing_table.

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



Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Reviewed-by: default avatar"Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922175121.work.660-kees@kernel.org


Signed-off-by: default avatarKees Cook <keescook@chromium.org>
parent 51a71ab2

include/linux/kvm_host.h

+1 −1
Original line number Diff line number Diff line
@@ -664,7 +664,7 @@ struct kvm_irq_routing_table { 
	 * Array indexed by gsi. Each entry contains list of irq chips

	 * the gsi is connected to.

	 */

	struct hlist_head map[];

	struct hlist_head map[] __counted_by(nr_rt_entries);

};

#endif