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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id f10-20020a9d6c0a000000b006e454aa54d1sm806213otq.56.2024.03.01.12.25.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 12:25:49 -0800 (PST) From: David Lechner To: Mark Brown Cc: David Lechner , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Kees Cook , "Gustavo A. R. Silva" , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH 1/3] spi: axi-spi-engine: remove p from struct spi_engine_message_state Date: Fri, 1 Mar 2024 14:25:18 -0600 Message-ID: <20240301-mainline-axi-spi-engine-small-cleanups-v1-1-241dfd2a79f7@baylibre.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> References: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mailer: b4 0.12.4 The program pointer p in struct spi_engine_message_state in the AXI SPI Engine controller driver was assigned but never read so it can be removed. Signed-off-by: David Lechner Reviewed-by: Kees Cook --- drivers/spi/spi-axi-spi-engine.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index 6177c1a8d56e..d89f75170c9e 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -82,8 +82,6 @@ struct spi_engine_program { * struct spi_engine_message_state - SPI engine per-message state */ struct spi_engine_message_state { - /** @p: Instructions for executing this message. */ - struct spi_engine_program *p; /** @cmd_length: Number of elements in cmd_buf array. */ unsigned cmd_length; /** @cmd_buf: Array of commands not yet written to CMD FIFO. */ @@ -543,7 +541,6 @@ static int spi_engine_transfer_one_message(struct spi_controller *host, /* reinitialize message state for this transfer */ memset(st, 0, sizeof(*st)); - st->p = p; st->cmd_buf = p->instructions; st->cmd_length = p->length; msg->state = st; From patchwork Fri Mar 1 20:25:19 2024 Content-Type: text/plain; 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[98.183.112.25]) by smtp.gmail.com with ESMTPSA id f10-20020a9d6c0a000000b006e454aa54d1sm806213otq.56.2024.03.01.12.25.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 12:25:49 -0800 (PST) From: David Lechner To: Mark Brown Cc: David Lechner , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Kees Cook , "Gustavo A. R. Silva" , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH 2/3] spi: axi-spi-engine: use __counted_by() attribute Date: Fri, 1 Mar 2024 14:25:19 -0600 Message-ID: <20240301-mainline-axi-spi-engine-small-cleanups-v1-2-241dfd2a79f7@baylibre.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> References: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mailer: b4 0.12.4 This adds the __counted_by() attribute to the flex array at the end of struct spi_engine_program in the AXI SPI Engine controller driver. Suggested-by: Nuno Sá Signed-off-by: David Lechner --- drivers/spi/spi-axi-spi-engine.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index d89f75170c9e..e801eed820df 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -75,7 +75,7 @@ struct spi_engine_program { unsigned int length; - uint16_t instructions[]; + uint16_t instructions[] __counted_by(length); }; /** From patchwork Fri Mar 1 20:25:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 13579067 Received: from mail-ot1-f48.google.com (mail-ot1-f48.google.com [209.85.210.48]) (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 04D683C68A for ; Fri, 1 Mar 2024 20:25:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709324754; cv=none; b=E6xrXoBCQ1GFPVCDD26tfsBgj/jrPL9QKOsJiOhXn39rugjI/A6GHKbb8QTJwHQI95wVX2iCZH9y35npMifnmya/PKn07uoCDIYoB8b4Y56AHLmhjFBj0PoYKUIrmKkNGpFfRTnCUy0yA6gH8QIXlHcfSvbf0Jls0ybWIUl9oZU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709324754; c=relaxed/simple; bh=r0GlreGLsYtbA/Nea/FJMUIpPOXUZxD98Y/U+q/kZ/k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=PfCfDLDZfotglILhsJx7wZL34bnDOLpoMFYhJ/h17TWFTf+0JRs8Jqt1jWOYcsOspSAe/Y8jLBdznz107AC5Wjvvsm3FGjGvciR7Ah7yK1vr1k2chnqYTZCB5ZkEvVQblqRScmaaXlISEjWtndk00OUb7tOsDnjoc5Xl+KC7uTA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=i6GOcPL8; arc=none smtp.client-ip=209.85.210.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="i6GOcPL8" Received: by mail-ot1-f48.google.com with SMTP id 46e09a7af769-6e4a803c72aso1285348a34.3 for ; Fri, 01 Mar 2024 12:25:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1709324751; x=1709929551; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=r4uxZbt0qin0Wn8Pr+rE6EDCFD41pXx3sQye6WwUWzw=; b=i6GOcPL8AT1LAVXkhE7YUVgaLtFy2ynvq0/1YkUBJArcYTcaZkv6pMXSXoHiagensk G7h0+i4TW0z6uNSqwrp4tX9krzlD9+3ppTYXmQR/1JpwqCD12PfGhwNaUdutGJN4pgzl oHC062+S1jK8DA2IZkB7H4dyLthluYAr/0PeoJAXJ2Be+HfbQ8DIw75OiqUsjPSp/g3x VerqdUwMuORqDfOwFkzqDZEcb475OVihaVC7rlNkaewqViRLEhR7z4CnljE4t7A+FEsJ wx4grYg7cNZwWKhhdjmcf0pNG5MiMWDuw88f5zbt1wMcDGtzxxAsByD8KEXwuX60Edmq z21Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709324751; x=1709929551; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=r4uxZbt0qin0Wn8Pr+rE6EDCFD41pXx3sQye6WwUWzw=; b=PYFKRsgeMggY4C6I5crigsXHmjoX0n0b2PDFmklXlsXqOg9bSVzFgBGRgfJg3OS+2W dr2lyWX5iKCOpcFUIUjI0IXadzmWJt54trAUcA1JILvnmYA2tFNE5xTc4Zs+BqpOCB1b ++/mAIsIM3ozCq1efkQSC2nV8u6vY4cHWxbBvRGhTA+yJ2RR8kmYnWZkqfoqDRAt29OZ 0gOQNfZuKRCCrV9MFFRssfnB1A+STi7wNCsNOc7J/x1JIbQi3Iv6naCneJsY4+PcGwhK dRipg/bzSy5xAwPxXsFv9Q8T5UYciGtUB7UKBzQ05xL/yu380Y27zMToDe5zfbGXEERU Ls3A== X-Forwarded-Encrypted: i=1; AJvYcCXiR5fYjkusTWWoDHABIU+FbUdBNQJZV24jYLJRE/vpLn9pXxUhi0MPkBE8re+I8LQqN8s+JDjQKXIe6EtjFECQA/3KPVb3ZY1NmXOtGU7x X-Gm-Message-State: AOJu0Yz1QgKh0W1IWzcY2zZNwFHwdHJdFFKJrjwM3/7b/SM3+5k3cXL7 UvPpOSHFIETIJtYypjRXmLL9hJeytZFUEtGecdAoRx+4xbFA2NdOjdJrQqiz8jc= X-Google-Smtp-Source: AGHT+IGOIf9N2e0j0sOh4gWwieqF/orAK7lWNJdnsL4VsiGKxZBiUNq+AipTLP8PSCm9ay/w98JPVg== X-Received: by 2002:a9d:6215:0:b0:6e2:baa2:42c8 with SMTP id g21-20020a9d6215000000b006e2baa242c8mr2925611otj.28.1709324751180; Fri, 01 Mar 2024 12:25:51 -0800 (PST) Received: from freyr.lechnology.com (ip98-183-112-25.ok.ok.cox.net. [98.183.112.25]) by smtp.gmail.com with ESMTPSA id f10-20020a9d6c0a000000b006e454aa54d1sm806213otq.56.2024.03.01.12.25.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Mar 2024 12:25:50 -0800 (PST) From: David Lechner To: Mark Brown Cc: David Lechner , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Kees Cook , "Gustavo A. R. Silva" , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Christophe JAILLET Subject: [PATCH 3/3] spi: axi-spi-engine: use struct_size() macro Date: Fri, 1 Mar 2024 14:25:20 -0600 Message-ID: <20240301-mainline-axi-spi-engine-small-cleanups-v1-3-241dfd2a79f7@baylibre.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> References: <20240301-mainline-axi-spi-engine-small-cleanups-v1-0-241dfd2a79f7@baylibre.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mailer: b4 0.12.4 This makes use of the struct_size() macro to calculate the size of the struct axi_spi_engine when allocating it. Suggested-by: Christophe JAILLET Signed-off-by: David Lechner Reviewed-by: Kees Cook --- drivers/spi/spi-axi-spi-engine.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index e801eed820df..9646764b0042 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -501,15 +502,13 @@ static irqreturn_t spi_engine_irq(int irq, void *devid) static int spi_engine_optimize_message(struct spi_message *msg) { struct spi_engine_program p_dry, *p; - size_t size; spi_engine_precompile_message(msg); p_dry.length = 0; spi_engine_compile_message(msg, true, &p_dry); - size = sizeof(*p->instructions) * (p_dry.length + 1); - p = kzalloc(sizeof(*p) + size, GFP_KERNEL); + p = kzalloc(struct_size(p, instructions, p_dry.length + 1), GFP_KERNEL); if (!p) return -ENOMEM;