From mboxrd@z Thu Jan 1 00:00:00 1970 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 2AAF6309DB1; Mon, 13 Oct 2025 15:40:55 +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=1760370055; cv=none; b=aPeFJSzkdLCDLrBmGrmif3NyjDWeM/gHcTNvsjFQTC+j60qyiMSBMSJoB5YCgxsaSs3wCXugsBw26tU6L+d6Y4O65JKMBXj/g61GOtVQPAGegScI4o9oVL4uepA4lR3gFTn/s0+CS2wQ0SOFHpOX1U/K1x6IZxj611UJNC/Kti4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760370055; c=relaxed/simple; bh=zPYV66mS7tlXCF7pzFMhB6IL8MR5DHrwhtND5FWHOvU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=prd8vAaaOrFygZEFrgbN45X1gFkqYi7xPf7QoJXedvCA+BrUsiE36RVSg4klRCnuiAYjebW6m8d9wimhqM7q+yVDXIpwY3utl9LbjHr0X/s8R1hmb1KCr6TZZWmGUXc6RolvsuNosJqadfMDAg+lqv8m3SOqyF7KIfDdwXqLkT8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=moGhovak; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="moGhovak" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A532C4CEE7; Mon, 13 Oct 2025 15:40:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760370055; bh=zPYV66mS7tlXCF7pzFMhB6IL8MR5DHrwhtND5FWHOvU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=moGhovakGqLWMOXaGGzm1Out98oNY+8heFmKkzWc1RDyijfVcZJeYxX7K7fV3rUQ/ 6vP9PaN+B5NwQF+VGTxbTj2C7Q1jFnKe8szDgBUeck3ekHQmzxnXZDSGdTXt2YgqO5 aG+XbUDgH7nEwxctJjke2TzE6sN5J9kNFPo3ekGA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nishanth Menon , Alexander Sverdlin , Herbert Xu , Sasha Levin Subject: [PATCH 6.17 463/563] hwrng: ks-sa - fix division by zero in ks_sa_rng_init Date: Mon, 13 Oct 2025 16:45:24 +0200 Message-ID: <20251013144428.056692839@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144411.274874080@linuxfoundation.org> References: <20251013144411.274874080@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 6.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nishanth Menon [ Upstream commit 612b1dfeb414dfa780a6316014ceddf9a74ff5c0 ] Fix division by zero in ks_sa_rng_init caused by missing clock pointer initialization. The clk_get_rate() call is performed on an uninitialized clk pointer, resulting in division by zero when calculating delay values. Add clock initialization code before using the clock. Fixes: 6d01d8511dce ("hwrng: ks-sa - Add minimum sleep time before ready-polling") Signed-off-by: Nishanth Menon drivers/char/hw_random/ks-sa-rng.c | 7 +++++++ 1 file changed, 7 insertions(+) Reviewed-by: Alexander Sverdlin Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/char/hw_random/ks-sa-rng.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c index d8fd8a3544828..9e408144a10c1 100644 --- a/drivers/char/hw_random/ks-sa-rng.c +++ b/drivers/char/hw_random/ks-sa-rng.c @@ -231,6 +231,10 @@ static int ks_sa_rng_probe(struct platform_device *pdev) if (IS_ERR(ks_sa_rng->regmap_cfg)) return dev_err_probe(dev, -EINVAL, "syscon_node_to_regmap failed\n"); + ks_sa_rng->clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(ks_sa_rng->clk)) + return dev_err_probe(dev, PTR_ERR(ks_sa_rng->clk), "Failed to get clock\n"); + pm_runtime_enable(dev); ret = pm_runtime_resume_and_get(dev); if (ret < 0) { -- 2.51.0