From: Kees Cook Date: Fri, 22 Sep 2023 17:51:21 +0000 (-0700) Subject: KVM: Annotate struct kvm_irq_routing_table with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a48e1f656b3c9b8192b6ca6fc92ef4daa30535fb;p=linux.git 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 Cc: kvm@vger.kernel.org Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230922175121.work.660-kees@kernel.org Signed-off-by: Kees Cook --- diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index fb6c6109fdcad..4944136efaa22 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -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