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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id j1-20020a170902c3c100b001bc18e579aesm11121886plj.101.2023.09.29.11.11.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Sep 2023 11:11:53 -0700 (PDT) From: Kees Cook To: Raju Rangoju Cc: Kees Cook , "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 5/5] cxgb4: Annotate struct smt_data with __counted_by Date: Fri, 29 Sep 2023 11:11:49 -0700 Message-Id: <20230929181149.3006432-5-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230929181042.work.990-kees@kernel.org> References: <20230929181042.work.990-kees@kernel.org> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1333; i=keescook@chromium.org; h=from:subject; bh=JLyOuNbsppgNQ4E7t00aHIOLLwYOPNO4180/z7PYk3s=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlFxNkFhFFrPwEa/QR03Eug35cqUa66za8zL4Yc tXAGq5NrJKJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRcTZAAKCRCJcvTf3G3A JhyfEACGOow2LuF71Rl2/1+567N4njI1FCgglmine5Smin9dsg3gXEI6wm5z9CqGgrQaAxNKx4C zmoIQ01iI7Dv13ajsqLxuuxhsDJJi33Q5MjAQ6XbWMCN0LDUIiu2pR1Kfv9XKAWxKV7qn/Oahln sryf9SDc7OSHj/Wou2usLanxazxvNzODnuZReRlw705m4BdnO7+yoLKCd981sdmOohczCfAyMaA oq2HA/pt2OaGJpZg2cOkDnndqDHgTmlwxYRg0Q8EUMa1h7eclM4/txL2VR1E0E9Spgv5lPy3iIh 3rT+0yAVFoS8jrHSxABKSgNMRRP8AMKK3PkL5oHS1mqJDFYcbFBgjuKj6sKIbea4RtS0cYek06M hQv1Rk9XX6y//jV7kU22s0/ms+WqRZcuSyVxxmYgk+jwnAmAG3oONUwdDKAmPdMrChdWi+Vin4i 5OAqx9x/Eq7456qC3yfH/YvEbpgKV1sMnxV3Q8GGgxw0rrrhY2tk99LzQ1S/WTU0x5s4ke3c2t8 Siui7ik4Owf/oSeTLtn0yvCObp0kqkPgm/SpI/ZFoRDeudgpA51AFk4mvoy4fWw7de2TLJv9xqE KgbrKJRdrPpV7PEwtt/iay1GE7okgsjLZngWqD5ddaUA0tA5o/C1aDYkNpJJyXLkAW8ZADALiFl qSiszCEru7ozwrA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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 smt_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Raju Rangoju 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: Gustavo A. R. Silva --- drivers/net/ethernet/chelsio/cxgb4/smt.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/smt.h b/drivers/net/ethernet/chelsio/cxgb4/smt.h index 541249d78914..109c1dff563a 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/smt.h +++ b/drivers/net/ethernet/chelsio/cxgb4/smt.h @@ -66,7 +66,7 @@ struct smt_entry { struct smt_data { unsigned int smt_size; rwlock_t lock; - struct smt_entry smtab[]; + struct smt_entry smtab[] __counted_by(smt_size); }; struct smt_data *t4_init_smt(void);