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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id m1-20020a170902d18100b001b8b1f6619asm17332300plb.75.2023.09.29.11.07.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Sep 2023 11:07:47 -0700 (PDT) From: Kees Cook To: Ido Schimmel Cc: Kees Cook , Petr Machata , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, "Gustavo A. R. Silva" , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH 3/5] mlxsw: spectrum: Annotate struct mlxsw_sp_counter_pool with __counted_by Date: Fri, 29 Sep 2023 11:07:42 -0700 Message-Id: <20230929180746.3005922-3-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230929180611.work.870-kees@kernel.org> References: <20230929180611.work.870-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1611; i=keescook@chromium.org; h=from:subject; bh=+RWfw0GyGwLXMxH+fSx74341Dume6vULCGctkWzJyII=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlFxJvQ2MJX5MIYubHbp+JLru78XV8PSD9HfCip MzkMrfhDwOJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRcSbwAKCRCJcvTf3G3A JnRLD/9EGd9KZ/Tj7Icy70EINkAG/rdfxW+EXWV6I9tI7aqUVeByxYSzHqj8FOidkSGNCh4jARc +uXnybahYfPpBWVV41kZfAhAIpxzSoq6s8NuNmkX6T8LHkps1oWxj6pDoKaoFfCMdsAhNUK1xcK UiU2qHZHzc1qKNWo1sAcHnPjme+swZST7xHSQ8SF2E13eDaQvKKEpdPeGtSNgPEV8yLj58EN7a0 iP8n1qZPDs7IoEuCGekv4cGmTTaSzUDc0R7Za2m+3bdHl4DcF9E+nOig6tbTybEZi1aNNjPdNL+ s+j9/MzDWmw9GMUxIetw7H9laEtIav7YYaf6G8aRv+wTndvPDcfVqBcvfdYnZNx0/rgJSm4e1K+ QhoQGun8o9/gzP/Y0vAq9j6Fqo2XYbAy9jfvjwol3QlvCJMu54iuM/U5nr6GkAWJ4k7d9jZiVFx W2aBOpvnHsbXQd8exwGC8sDd5XFNezCGfQ+qK0pWvD3xzZtJ8mgiQFrhnx7KZDh2+fYU33Hzy8K 6beObhLWjwE4DYbXYUH8YXOE31yPMSY5K6435NP9Zhlwr4oB1bNxjmDgCqJC73O+PFfJuj6UzKl fpEuOHPJVmLtuWUTjz2a/oXMxNT4xkygpO3lIq/qJUoDhiJqrHWI4WM1E4GV4EiRdSAkrIFp856 Z9rPTNG+P+HSMvw== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 mlxsw_sp_counter_p= ool. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/cou= nted_by.cocci Cc: Ido Schimmel Cc: Petr Machata Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Ido Schimmel Reviewed-by: Justin Stitt --- drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.c b/drivers/n= et/ethernet/mellanox/mlxsw/spectrum_cnt.c index ee59c79156e4..50e591420bd9 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_cnt.c @@ -24,7 +24,7 @@ struct mlxsw_sp_counter_pool { spinlock_t counter_pool_lock; /* Protects counter pool allocations */ atomic_t active_entries_count; unsigned int sub_pools_count; - struct mlxsw_sp_counter_sub_pool sub_pools[]; + struct mlxsw_sp_counter_sub_pool sub_pools[] __counted_by(sub_pools_count= ); }; =20 static const struct mlxsw_sp_counter_sub_pool mlxsw_sp_counter_sub_pools[]= =3D { --=20 2.34.1