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From: Kees Cook <keescook@chromium.org>
To: Jakub Kicinski <kuba@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org,
	linux-hardening@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Dan Williams <dan.j.williams@intel.com>,
	Keith Packard <keithp@keithp.com>,
	Miguel Ojeda <ojeda@kernel.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Dmitry Antipov <dmantipov@yandex.ru>,
	Nathan Chancellor <nathan@kernel.org>,
	kernel test robot <lkp@intel.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/2] net/ipv4: Annotate imsf_slist_flex with __counted_by(imsf_numsrc)
Date: Tue, 13 Feb 2024 15:42:11 -0800
Message-Id: <20240213234212.3766256-2-keescook@chromium.org>
In-Reply-To: <20240213234023.it.219-kees@kernel.org>
References: <20240213234023.it.219-kees@kernel.org>
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The size of the imsf_slist_flex member is determined by imsf_numsrc, so
annotate it as such.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org
Cc: linux-hardening@vger.kernel.org
Acked-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 include/uapi/linux/in.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
index e682ab628dfa..2f0c4d40bc7b 100644
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -199,7 +199,8 @@ struct ip_msfilter {
 	__u32		imsf_numsrc;
 	union {
 		__be32		imsf_slist[1];
-		__DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex);
+		__DECLARE_FLEX_ARRAY(__be32, imsf_slist_flex,
+				     __counted_by(imsf_numsrc));
 	};
 };
 
-- 
2.34.1