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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id a22-20020a62e216000000b006875df4773fsm307299pfi.163.2023.08.17.16.59.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 16:59:12 -0700 (PDT) From: Kees Cook To: Vinod Koul Cc: Kees Cook , Laxman Dewangan , Jon Hunter , Thierry Reding , dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org, Hector Martin , Sven Peter , Alyssa Rosenzweig , Ludovic Desroches , Tudor Ambarus , Lars-Peter Clausen , Zhou Wang , Jie Hai , Andy Gross , Bjorn Andersson , Konrad Dybcio , Green Wan , Orson Zhai , Baolin Wang , Chunyan Zhang , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Peter Ujfalusi , Kunihiko Hayashi , Masami Hiramatsu , Yu Kuai , Greg Kroah-Hartman , Jordy Zomer , Jernej Skrabec , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 15/21] dmaengine: tegra: Annotate struct tegra_dma_desc with __counted_by Date: Thu, 17 Aug 2023 16:58:52 -0700 Message-Id: <20230817235859.49846-15-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817235428.never.111-kees@kernel.org> References: <20230817235428.never.111-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1306; i=keescook@chromium.org; h=from:subject; bh=IvCoDTUmPGIj+7qEwbz1ZUwbMaX1EfMB2pX6XS9uHHE=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3rRBfmj3qZYeUoE3VYSBxcgFtgqsG+6voaDsG dN7+tvlUR2JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN60QQAKCRCJcvTf3G3A Jg8fEACt1MzmrcCipsy/0n1aAT9hBbqUq5idN/BI2c3yHNHVpnIRI5GN1j7hOdImkZfcRTcOTFJ VUxhWitSM/ypDtTnX8pInDcpcIu9N4U+Uv2olN0raAq3sK4EZcADL/p0aPckt7B1JZjlIPD9F1Z OG+WAsV238be/ceJ4BkyWHI9QjMdcsxyLXZvv8kYFGxNbR+Q2BH33KwV39nvO/xtBtaxxMFkmMJ 3n8JUfQRVVjQmXT3b8UWREZN2S9RD7HaXr3QOVGM4KYaWc5vOPA410mtWrNpBmBUWLkcFraCJql BLUul3gf5WgSXSKOSBrzDFIkO9KIYxiRJ4HNItT5cRlbzW/IzY+cWiUwd0d0Z1HuLq2ualRyuM4 sJgnDenKCrbgN6BrNEzBLFutAuzp0x9KxrorooWOaCnulXSBpCQDM/L2DCoK6EsmSBAF7qEDp27 MOaEZlijjaJ4OMM0jgxuVCco5wpR9YTOPyPeESqX7QZUoCyGDBPVqPMg5SyBDL+5rStUEsW4riP jGHKZiuI0eaNMNa5VdHILPKgR/qXNZM6uNcfF9qgsUicTfY1ov8F+2CVIYB8e1Ka/Di+zeUra6o gyFd6zhW5eFnGFR90vPU3Gq/JAQmPESBS4YarQhrVCMJGZkllIB/I5nzaP9nIPCfsM9hTkcg81S asDsoiP0g9COZRQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org 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 tegra_dma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Laxman Dewangan Cc: Jon Hunter Cc: Thierry Reding Cc: dmaengine@vger.kernel.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- drivers/dma/tegra186-gpc-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index 33b101001100..5e3d5f5d1e20 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -221,7 +221,7 @@ struct tegra_dma_desc { unsigned int sg_count; struct virt_dma_desc vd; struct tegra_dma_channel *tdc; - struct tegra_dma_sg_req sg_req[]; + struct tegra_dma_sg_req sg_req[] __counted_by(sg_count); }; /*