Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] KVM: Annotate struct kvm_irq_routing_table with __counted_by | Date | Fri, 22 Sep 2023 10:51:21 -0700 |
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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 Signed-off-by: Kees Cook <keescook@chromium.org> --- include/linux/kvm_host.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index fb6c6109fdca..4944136efaa2 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 -- 2.34.1
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