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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id j19-20020a62b613000000b00686dd062207sm303138pff.150.2023.08.17.16.59.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 16:59:03 -0700 (PDT) From: Kees Cook To: Vinod Koul Cc: Kees Cook , Green Wan , dmaengine@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 , Orson Zhai , Baolin Wang , Chunyan Zhang , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , 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, linux-tegra@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 09/21] dmaengine: sf-pdma: Annotate struct sf_pdma with __counted_by Date: Thu, 17 Aug 2023 16:58:46 -0700 Message-Id: <20230817235859.49846-9-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=1179; i=keescook@chromium.org; h=from:subject; bh=dwauH20Q6xP+4LjfvKyJpROFf0PoQOEsyr9XswCqTTo=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3rRAkodXaKGN3V1cUAy87CQjDpadxCYl1kOBd DBX6VSqtKqJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN60QAAKCRCJcvTf3G3A JhaWD/0XQBG0IAu8uYIo6t2lBljNvRssqu8rPbwygr+clzyF6mT4ykHSqyehzafLdrnxfXUPnQy 7BXo7qTX/oOe1mMmwnZYjE73otVC/9AG7HD+0i1rpKjSIX1y0le1b27SkDT1VdkFNlTusQCkHFg N3qVIdjMWBWwJkTzFR9rfsDQ6XzoTOw905VArPKp6G9jxz7DuCezAKXTuv4BpHoiKAZDDh2vuLz enaGQRuFi2KS4XamCm/yHnJAuch2CCUiMdV67KWMK21AjDP+MBiMpySm50hyDgoa+xj7Luu0FFE qsPtCNeN4wS0lLVMcqh7o8Trt0KEmujaOHtO7RTEoaMPkF5tDXDbc6VRyZTmQ6mtSfZ7nwzqhCi 1PW3zrheQxQAES85LM8xFRwN9g+ziQ36L5iJzjYXN0KBMovPVI0h7NiFtKGVCh7ky3Jljdi9Ukv Alk4rWFr8Za6dePWPce8DRR6N5QhqfRajF8DekFiE3w38UdfEjjTY1xybDZ2AogeV7rkyLtxPyc 3a6W2kiYw8Z7qmcKgsC5yF//aE5NhmtceubIVx0OhZwyljwhIJfjee+SSLqXrFmkeyn42jMoxKx Pa7DzAc6Kq8z1tUF8leTymViabKoo6SP81mWA3tXaPNpW0RNU6FkA5BfjD1MQgRH4Y3D0t14ieo fgf64ePLeCeyjxg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-hardening@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 sf_pdma. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Green Wan Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- drivers/dma/sf-pdma/sf-pdma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/sf-pdma/sf-pdma.h b/drivers/dma/sf-pdma/sf-pdma.h index 5c398a83b491..d05772b5d8d3 100644 --- a/drivers/dma/sf-pdma/sf-pdma.h +++ b/drivers/dma/sf-pdma/sf-pdma.h @@ -113,7 +113,7 @@ struct sf_pdma { void __iomem *membase; void __iomem *mappedbase; u32 n_chans; - struct sf_pdma_chan chans[]; + struct sf_pdma_chan chans[] __counted_by(n_chans); }; #endif /* _SF_PDMA_H */