From: Kees Cook <keescook@chromium.org>
To: Marc Zyngier <maz@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
linux-hardening@vger.kernel.org
Subject: [PATCH] irqdomain: Annotate struct irq_domain with __counted_by
Date: Fri, 22 Sep 2023 10:51:27 -0700 [thread overview]
Message-ID: <20230922175127.work.214-kees@kernel.org> (raw)
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
Cc: Marc Zyngier <maz@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
include/linux/irqdomain.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 51c254b7fec2..ee0a82c60508 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 */
--
2.34.1
next reply other threads:[~2023-09-22 17:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 17:51 Kees Cook [this message]
2023-09-23 16:32 ` [PATCH] irqdomain: Annotate struct irq_domain with __counted_by Gustavo A. R. Silva
2023-09-28 10:32 ` [tip: irq/core] " tip-bot2 for Kees Cook
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