From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 9FA7A3CB56A; Wed, 30 Sep 2026 19:18:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790795922; cv=none; b=hIOoi5vbuDsBbxx9NZx9KHUtui5CZ2mpV/4G6uKR0P4+qx1g/UCZSLhsYtqqj67bRSgYhpHdem+sQftGQz1n2eM80i0ktaa12bG6DFDKf/bjEsBdKaeJbvSJBNVQ3+aIb61f+kehr5uzhJV12YnmrRIkM0g+CmVEW1ZuSBapysM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790795922; c=relaxed/simple; bh=ylYiPMkUDV9Z+DnV5XoME3WOaJ9NOFpguwbClUSzsLw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=A7WVInnZuD+vRzPCxpjfR2MKAXSaw3V6Hfydd6odaXDfHHOuwtQZfU83XVQ7E6CikSqAh6m4Vge4A7rAptdfqgvTygtujlOeQG/qe0i8U5hK4ubWI4k2743oGyITSZgiFVRDrRilkjWS1rH6/byT4OGJM6u04IAoSguDMb3SfL0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zWbqYW9A; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="zWbqYW9A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 051031F00898; Wed, 30 Sep 2026 19:18:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790795921; bh=lbTNNbDibo34NoGKbbAuxJo8MWbseb5MuwGYBQ1qgB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=zWbqYW9AU/tYH3tM7jTCm3dCY8EhnbEQGD/8UctaWPYD5BxR2SxnK0FBrdGJy8PiU aO8sUKOnWk+Bv2lGNMbbQKYJwrRjkrduOJa3+alhvbwwKsMmkFEu5wwDnscDZDe9Bk oUIq1ikFsbNrist7pFZ9IhxylLEercvYlCQpg/5o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xixin Liu , Sudeep Holla , Sasha Levin Subject: [PATCH 6.6 0731/1193] clk: scpi: bound-check DVFS index in scpi_dvfs_recalc_rate Date: Wed, 30 Sep 2026 17:23:35 +0200 Message-ID: <20260930152450.492666887@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xixin Liu [ Upstream commit 70f4b78d560e592cbf3325b162424737d032fc1d ] dvfs_get_idx() may return an out-of-range index if the SCP firmware is buggy or returns a stale value. Only negative indexes were rejected, so a large index walked past info->opps and could treat garbage as a clock rate (KASAN OOB / wrong frequency to consumers). The missing upper bound dates back to the original SCPI clock driver. Treat indexes >= opp count as invalid and return 0, same as idx < 0. Fixes: cd52c2a4b5c4 ("clk: add support for clocks provided by SCP(System Control Processor)") Signed-off-by: Xixin Liu Link: https://patch.msgid.link/04f9ab766e07.v2.1785200642.git.liuxixin@kylinos.cn Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/clk/clk-scpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/clk-scpi.c b/drivers/clk/clk-scpi.c index 5ab46a537b5d3..71f1e6d61ece3 100644 --- a/drivers/clk/clk-scpi.c +++ b/drivers/clk/clk-scpi.c @@ -85,7 +85,7 @@ static unsigned long scpi_dvfs_recalc_rate(struct clk_hw *hw, int idx = clk->scpi_ops->dvfs_get_idx(clk->id); const struct scpi_opp *opp; - if (idx < 0) + if (idx < 0 || idx >= clk->info->count) return 0; opp = clk->info->opps + idx; -- 2.53.0