From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f174.google.com (mail-oi1-f174.google.com [209.85.167.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ABFDD3F4A3 for ; Tue, 3 Oct 2023 23:28:03 +0000 (UTC) Received: by mail-oi1-f174.google.com with SMTP id 5614622812f47-3ae5ce4a4ceso1004700b6e.1 for ; Tue, 03 Oct 2023 16:28:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1696375682; x=1696980482; darn=lists.linux.dev; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=l1cocEZekiORqignw5iQ3QnO8ZAEe34D0CJMf8KTzIs=; b=YEtEXOdwLyAJBAW7p4D/s5VQ+DRdXxbCEZzLtYvZxb8jd2iI0/sN8VOUyb00pQrvnp ehHz0iRDE7jR8npyIJS8w25QazMurTW2PQO/InJtWOp2pDcRIed64PeTrM37UGt/erOp s4b49FE1fYFmf24LxCedTaLySsYDO0b7EUFME= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696375682; x=1696980482; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=l1cocEZekiORqignw5iQ3QnO8ZAEe34D0CJMf8KTzIs=; b=vvCK3btRfuDqwtlOwbxVl2sKmvf2uMuwtgCXQUZJV0B9gdtF3ZUHuoVtGpr3Y6YinT 1C9+mfVYZrUuFMQwUx2/BR6oqbeOaGEOqU+9dJt+2s/XANw6kY+LRM+3nKjBxFhe0uiD S0903TeZwctIuLU5lH/NQQwsbS0kzwn/Ur/FghLQgJWuWLR34nG8U2qzl9TilvP1shgI tB2zWDKCR25j+4IRX9xjfbK7YqKEI/ysibzo+1tkE1YPZyyW0TxnDKHb3m+5rYzuv/21 B57L288nD8qfv8Wv209XG9z/+Y6EKsR9haReA2wSqdpqc5HU6qYXiS1+ceEnBy7s/Www Kksg== X-Gm-Message-State: AOJu0Ywb/SvsIRCRS7imm7ITDzSKk+T/akDX0adUEi4TJnrm3zN/gN0O v+/hZlkDztX/6tghcxph4/FfnQ== X-Google-Smtp-Source: AGHT+IGcDZsz8I7q8HeOw+zAOiVjTbrdYbyOyLeLVe3dMszaNS4gWaQkf5NPvjAd8b8Ijnz9eccivg== X-Received: by 2002:a05:6808:1386:b0:3ab:83fe:e18f with SMTP id c6-20020a056808138600b003ab83fee18fmr1040629oiw.35.1696375682763; Tue, 03 Oct 2023 16:28:02 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [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 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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: 8bit 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_engine. Cc: Vinod Koul Cc: dmaengine@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook --- 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); }; #define edma_read_tcdreg(chan, __name) \ -- 2.34.1