From patchwork Thu Apr 25 16:55:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nathan Chancellor X-Patchwork-Id: 13643563 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CC54131746; Thu, 25 Apr 2024 16:56:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714064184; cv=none; b=rizXfR5z/jih3+oXhCATha8ltO3BHmDAtNDymdVt76+7ZeJXM/iXk+lU89NOSAvZhBUvrYY4Ex5EVPkIK+yshORQ5K5xd6HeluICfJ+8YOFLjKWIynvWRHRNnBzWziFRUee1lLW/blC5VizRl+a1C8RFmMOk7q4OHI3x8OhQNGY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714064184; c=relaxed/simple; bh=xOZM1ewaEE8webcrxae6fRZ3lapbeFGOs6WCFr8o9mU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gxF35AdsrsXXz0H0t7cdXiR/0YoXhIQ8f90no21ZkbQBeyl4QDKvIxNaCBYeA2RytJebMLvRqjHdy6VhaegLU8GPz0jRoa2S8ucp3XwjSLGZ5dQuXgJVvzOJuqYP8+XkIOsHkaoj1sdZGjypcIK0pqEtYBUSAwKMzf5Cb83PwNU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aBmRapsv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aBmRapsv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86EC4C4AF0D; Thu, 25 Apr 2024 16:56:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714064184; bh=xOZM1ewaEE8webcrxae6fRZ3lapbeFGOs6WCFr8o9mU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=aBmRapsv6IaKBvdiQYhwCmEf62JM5xoaIdiZiuzQMg+cDdNZ5fUPBS0dvn02e3av9 zI2nOSy20qcJz3Vvu6so2xEacDjHl5ORFeYDK8ApeaQwQJkHbbQ8Bf4QDslxjjJv+Y oLDNM5DU10WXbvFj1NVqBfIxdsS7RjR25TBTrRN5h7Avx0QCbfSFuzbilZlZ3xr82q y13aputd6YFD4hjuFFtnmMn9BNWvTaMgZ6K+Y/I/ZlpdYlOhKVjAewRdxcu/yBXU+9 O2Ga2ovz2u7oU/CviciWQV/ZmGoZ6mwAqQnM6aHY3q94S0XD0Gwv4eKiMzUYVsLSgB c1kRGKIZXJn/Q== From: Nathan Chancellor Date: Thu, 25 Apr 2024 09:55:52 -0700 Subject: [PATCH 2/2] clk: bcm: rpi: Assign ->num before accessing ->hws Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240425-cbl-bcm-assign-counted-by-val-before-access-v1-2-e2db3b82d5ef@kernel.org> References: <20240425-cbl-bcm-assign-counted-by-val-before-access-v1-0-e2db3b82d5ef@kernel.org> In-Reply-To: <20240425-cbl-bcm-assign-counted-by-val-before-access-v1-0-e2db3b82d5ef@kernel.org> To: Michael Turquette , Stephen Boyd , Florian Fainelli Cc: Kees Cook , "Gustavo A. R. Silva" , bcm-kernel-feedback-list@broadcom.com, linux-clk@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, patches@lists.linux.dev, llvm@lists.linux.dev, stable@vger.kernel.org, Nathan Chancellor X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1678; i=nathan@kernel.org; h=from:subject:message-id; bh=xOZM1ewaEE8webcrxae6fRZ3lapbeFGOs6WCFr8o9mU=; b=owGbwMvMwCUmm602sfCA1DTG02pJDGla3abTn9y8tqDHMf/Qn/N85dnXVnov523rf7SlcaFbR 2b1jttqHaUsDGJcDLJiiizVj1WPGxrOOct449QkmDmsTCBDGLg4BWAiPKUM/1MLZtRPneq48r76 vu2NLyLVtxv1zLwQaPcvwZZv+ulgOV1GhgXn/XQKJgfuK7uWwHxp29VlqtZzb4XqTdmabG4lH3B DkwMA X-Developer-Key: i=nathan@kernel.org; a=openpgp; fpr=2437CB76E544CB6AB3D9DFD399739260CB6CB716 Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer about the number of elements in hws, so that it can warn when hws is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in raspberrypi_discover_clocks() due to ->num being assigned after ->hws has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4 index 3 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]') Move the ->num initialization to before the first access of ->hws, which clears up the warning. Cc: stable@vger.kernel.org Fixes: f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") Signed-off-by: Nathan Chancellor Reviewed-by: Kees Cook Reviewed-by: Florian Fainelli --- drivers/clk/bcm/clk-raspberrypi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c index 829406dc44a2..4d411408e4af 100644 --- a/drivers/clk/bcm/clk-raspberrypi.c +++ b/drivers/clk/bcm/clk-raspberrypi.c @@ -371,8 +371,8 @@ static int raspberrypi_discover_clocks(struct raspberrypi_clk *rpi, if (IS_ERR(hw)) return PTR_ERR(hw); - data->hws[clks->id] = hw; data->num = clks->id + 1; + data->hws[clks->id] = hw; } clks++;