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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id b1-20020aa78701000000b0068895d26b79sm330575pfo.10.2023.08.17.16.59.01 (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 , Andy Gross , Bjorn Andersson , Konrad Dybcio , linux-arm-msm@vger.kernel.org, dmaengine@vger.kernel.org, Hector Martin , Sven Peter , Alyssa Rosenzweig , Ludovic Desroches , Tudor Ambarus , Lars-Peter Clausen , Zhou Wang , Jie Hai , Green Wan , 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-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 07/21] dmaengine: qcom: bam_dma: Annotate struct bam_async_desc with __counted_by Date: Thu, 17 Aug 2023 16:58:44 -0700 Message-Id: <20230817235859.49846-7-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=1277; i=keescook@chromium.org; h=from:subject; bh=EQ7cpalnAKUyzLqTacn9WNqARa63ulJkEyu4D2Ryyyc=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3rRAitRrc5HSuDDp9nSRHlzoamdndhZaOduWN UM/7/lcEfqJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN60QAAKCRCJcvTf3G3A JqFGEACsptEBgA3lauCtB5TOKqtQKh3P+mbX/mtGO8a9W0CiYk5jSkW8FeW+uEEu9jqPlOe2zp6 VSn60+wScZZEY+K3j1v/qMyWWXD45XjY50dVtFHtTJRPTWyVPBQ26JpXBlcUIxJWVXE+qEqu8xs nM9fAd0Q4raL9j6gTyl4Q/H57pFGmekGp6X011FxYjG06ztC8X1kYIpW+n5spozri+LKhexD5l+ 7n6syLTt5CG3eI4MTbgFf8b9KsEIvIWoY1Xf5nTs2KenjD0o0oNK4KkAX788uTSFtpS3uXYjuXU cUTm2k9PIAJsA1uPnVdTPyJwq3oFeBvteGhQS+eNCYOjz7Q8uncrDTyrjgfhAx5cgVXDD9iXEPW 14ufmJkFuOH7MBsTRhtKaPqnoDu8zW+Cxh7oaKTqN3nGiXHq9Dx0kckpHyQNC+Tr/NsEfp+KGA7 iZgUEQZJRnMlRXZUj7gHdrvhU2nXB4JCmDY2wDoJBkNJzMCKFpGtaCDFxsaS9VOyd8o6SdV+ek4 gQxjEcG6VcYNhBec8cPzkPHJRX52CUyMWCs9+V/DOtst7ojlX1ZxoNbO+fFYC9vpV3qMFhsDshK xwSv51OKzq3KOFZdMPD0yf7xcDItQXPgtLzfS2NeB6hSlD07ZusYdvsF/hh2k9j9TYtPAgKyHl+ /onf0nURDF25ejQ== 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 bam_async_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Andy Gross Cc: Bjorn Andersson Cc: Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- drivers/dma/qcom/bam_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 4c3eb972039d..65b89bb7a56b 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -74,7 +74,7 @@ struct bam_async_desc { struct list_head desc_node; enum dma_transfer_direction dir; size_t length; - struct bam_desc_hw desc[]; + struct bam_desc_hw desc[] __counted_by(num_desc); }; enum bam_reg {