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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id b2-20020a63a102000000b005637030d00csm1917249pgf.30.2023.10.03.16.28.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 16:28:02 -0700 (PDT) From: Kees Cook To: Vinod Koul Cc: Kees Cook , dmaengine@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] dmaengine: fsl-edma: Annotate struct struct fsl_edma_engine with __counted_by Date: Tue, 3 Oct 2023 16:27:56 -0700 Message-Id: <20231003232704.work.596-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1156; i=keescook@chromium.org; h=from:subject:message-id; bh=s8UpsNSdXXPa2sG80VKv45a8RFcNlzZa7z4+aE1gKZA=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlHKN8cBMJPNyzXXuGAC8pBAjZvNoG6NrfePoLd C9D5gSb26qJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRyjfAAKCRCJcvTf3G3A JuEJD/9v/LCGJzv4Rw87JT1vYJVt0ykGcqLmnwnqOBGGZsqevqD+b7qp14+O1Q8lnIkI4W33lG2 WbeXUWN6tcTbe2U5IZqKbtksxWFE9qY5jG44U0LWuYDitzIy3zpXoUzf9KKtH0MFHEZgbdcWT+v advfP2YT7lRageoZr5YdGugHBpNZ/jaZEB75Sbmm6rfce8egfMISd/JvRWzu5Vk1EszldbP1i9b X0VVdfiA4Ip9o7U//FK/Qhh+dHVNCeAxH8tjonoTn8VmX9dVq9kEIIlNdqdakhQ0cqotn8K+UUz TEg4oOAtEvyQFwLSSFJOWWrbwtEsZt/hyQKAZg0s7KrNXDkaRw2QJ+HfpOmnWnrZIEIcSeVSYxl ZG7UCCXQkpA+wJQ7/w/j53k+5e+LHjmnZgv9fkU9QVQs/NUCWMvaldXHJnVsUBfJ2Wsl464Pd6Q VDhJzr/ZMMATrkL4cRoZCmPBuJHtTFPoUDIiMmnFlZab82OB2xZ02UKYagv77ZurGq/O9vmzYdl 6D8O7BYvb1dlOYv/uEpQHR3PaTu2k+nq1RXhNk3opBHUl1hrke7gJEcsFF6ehvPQY2fvHgESw04 RR7Lmu9tmg7ilcDwH1bO92ixNm7NP1P8B30siaG24HjWBbalKHnxhHyQaO60ldjhBdlBVJ0wRGl /fnpHhl RpJmix4Q== 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 struct fsl_edma_en= gine. Cc: Vinod Koul Cc: dmaengine@vger.kernel.org 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 --- drivers/dma/fsl-edma-common.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h index 40d50cc3d75a..bb5221158a77 100644 --- a/drivers/dma/fsl-edma-common.h +++ b/drivers/dma/fsl-edma-common.h @@ -225,7 +225,7 @@ struct fsl_edma_engine { bool big_endian; struct edma_regs regs; u64 chan_masked; - struct fsl_edma_chan chans[]; + struct fsl_edma_chan chans[] __counted_by(n_chans); }; =20 #define edma_read_tcdreg(chan, __name) \ --=20 2.34.1