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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id rm10-20020a17090b3eca00b0026d214a2b33sm131393pjb.7.2023.10.03.16.18.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 16:18:41 -0700 (PDT) From: Kees Cook To: Tony Nguyen Cc: Kees Cook , Shiraz Saleem , Jakub Kicinski , Jesse Brandeburg , Gurucharan G , "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] i40e: Annotate struct i40e_qvlist_info with __counted_by Date: Tue, 3 Oct 2023 16:18:38 -0700 Message-Id: <20231003231838.work.510-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1338; i=keescook@chromium.org; h=from:subject:message-id; bh=XJmzLNCWCq9YJs2cHWDwGPsTN/+2AuiJN1wF3YGzDV0=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlHKFOp5cWExP0FGb1XOfa88nHjK8wg6ypG15KM sMyDpMQtHCJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRyhTgAKCRCJcvTf3G3A Jk2cD/0X92kJJBn7TO38jm2i1YhnSulInssq7vfXn13tXcHB299D7h/dNsj2MS45px/FmCwSHbL O8Gt4OGxRF6xt8udrKExaljjXh9erDJMgs/pvTdQZakYtRpZqizAN34S0sXXjEYaGHR74sAziqf LeMGpPzsQoC8RjpdiJGpClQSAjkk2ms/ZkQW8ClLsCmgRcpslZmZifY3UhW7KBKsYZMLCVRp07k 7/dWHhYhNT0i5GSnU1eCTTjvPk8tCY7suSKbBw40JmMsZ6W34OdUhAKUUBPvCHt+RoY7olPaPvT cXtC8x8tjREOv/pP7lMLDdXxsD9y2qIdimDNoaVRispFjidmNbqgybVPS2ksQtpMxQ3bQR1uy4p ZqZ792mGi2W+YH6Hxkf2/Sh9XmFSwMwPmYfcI3z8SyqN3tJJGoZKTebTK+R9tKkgzkrJtT1FrPB Yz7ggeiZ1v3Vod+Y1aYyEpHvHJBpRkGKHOT1pbKihy1e14srFxJ+2u/sSx43Tha58iNTERjaIwh Hn44PyNLQDfiSS3P155/ty3NdovaUsvTC6pPGBqAk0OU8AUSoaha+EcIJnU4yxLsWNxt171z082 CgdMMNgYFnZ6eBo7ETY54sYXh1/rzDPF1CqFF8sc6Fb5uN4jYQPSUdNZQGc3d3mW6vuwRMtTFcZ DdbEI8a HM7vhe5A== 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 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 i40e_qvlist_info. Cc: Tony Nguyen Cc: Shiraz Saleem Cc: Jakub Kicinski Cc: Jesse Brandeburg Cc: Gurucharan G Cc: "Gustavo A. R. Silva" Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/c= ounted_by.cocci [1] Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- include/linux/net/intel/i40e_client.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/net/intel/i40e_client.h b/include/linux/net/inte= l/i40e_client.h index ed42bd5f639f..0aa4411528fc 100644 --- a/include/linux/net/intel/i40e_client.h +++ b/include/linux/net/intel/i40e_client.h @@ -45,7 +45,7 @@ struct i40e_qv_info { =20 struct i40e_qvlist_info { u32 num_vectors; - struct i40e_qv_info qv_info[]; + struct i40e_qv_info qv_info[] __counted_by(num_vectors); }; =20 =20 --=20 2.34.1