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 63B2E492E5C; Wed, 23 Sep 2026 14:53:26 +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=1790175207; cv=none; b=JBDJEccFjKm0wBcRp4+u/4BlaqeiAKNxzXNpi2IAkIj32BD19n2KPewqMqEs45EROvceHBZoqs+expSTq2XxWrjvWxV7G5RX3v/YIsg+E2Wrb6pjmbYQtmXU+eswYoBfLtzx3uKyxkqMqdje0uwVwGKk0oKDCbs1G+79enBhnNw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790175207; c=relaxed/simple; bh=ImP73V65SZhKOJbhCaLcOJ50la53WdDwPXvrhZuZm3k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fJvsM+qVptJeWe3vrfw4JdstSQdNGjOWhOWfExNe7Fx3Qk8u5WaopS6EM6TFYFJI2PPnklicZKCMF1q0C+2mJh+jxXZ8oK3Lj3PwcA9ovj7HaohFcwtTsnMMv+gKi4PxNYYyA9PZNgGCqGPdBQgod28DzC4pm/gUy8Ab2YrMTsc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rsJj1Rb+; 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="rsJj1Rb+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84B001F000FF; Wed, 23 Sep 2026 14:53:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790175206; bh=4G6hb9bzFoSQyVgOp87Q+wV8Qfl6MbY/sDJ1buZlyrM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rsJj1Rb+icNLR6RP0FwcHFzAelp8fYzAZqRTwZqzxrWnU1bEvzjEgj3qwr2lna2hT rDTSFilyN5n3rq9yS62h2bdjtH2YJ95FJsdKdJTMpHKa/5Px0DcVa3eaHHToBlX8A3 787F2qAfJp7jWEJ49FRnuLn85Ib0KsIrlJNhEmWw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tzung-Bi Shih , Guenter Roeck Subject: [PATCH 6.18 319/398] watchdog: rtd119x: Avoid division by zero Date: Wed, 23 Sep 2026 16:06:33 +0200 Message-ID: <20260923140651.689569969@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140643.441954610@linuxfoundation.org> References: <20260923140643.441954610@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tzung-Bi Shih commit 5af7d2cbd20f893def03c8310a460ade66a5d822 upstream. clk_get_rate() could return 0. Avoid a division by zero panic. Fixes: 2bdf6acbfead ("watchdog: Add Realtek RTD1295") Cc: stable@vger.kernel.org Signed-off-by: Tzung-Bi Shih Link: https://patch.msgid.link/20260913064851.8239-3-tzungbi@kernel.org Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/watchdog/rtd119x_wdt.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/drivers/watchdog/rtd119x_wdt.c +++ b/drivers/watchdog/rtd119x_wdt.c @@ -98,6 +98,7 @@ static int rtd119x_wdt_probe(struct plat { struct device *dev = &pdev->dev; struct rtd119x_watchdog_device *data; + unsigned long rate; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) @@ -111,10 +112,14 @@ static int rtd119x_wdt_probe(struct plat if (IS_ERR(data->clk)) return PTR_ERR(data->clk); + rate = clk_get_rate(data->clk); + if (!rate) + return -EINVAL; + data->wdt_dev.info = &rtd119x_wdt_info; data->wdt_dev.ops = &rtd119x_wdt_ops; data->wdt_dev.timeout = 120; - data->wdt_dev.max_timeout = 0xffffffff / clk_get_rate(data->clk); + data->wdt_dev.max_timeout = 0xffffffff / rate; data->wdt_dev.min_timeout = 1; data->wdt_dev.parent = dev;