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 70DFC497B76; Wed, 23 Sep 2026 14:31:32 +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=1790173893; cv=none; b=HurZdr+cGkwklHtqZDhOZWhLNzKVkQgi4FOyfAcHubUIvR+kTWdt3HVSkKPvfKQ0DKl/RHgPl6Y4pXTRvG2BhRTBJriQEVg/JwqbQe2oBER/u8FxcAKYKct2S6EGRchzTd+P5OkPk5fWU2e+3KVlHidUj6LqC7HWMc+iIxmcM24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790173893; c=relaxed/simple; bh=EZDQxlY8nBRsnbUeAtAWk9Bx4SdU036Imp3PZbky254=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iX65fhwrOaqabIWLy+Ak7NOZKsDZh2lPxJRYYKdCymMeBRal227eXLDSyp9Sc1maRdqW9NYTsE5Ph0UGkdSHyxIofByJE0TnXDZeeuR0HyTFnspLGCdvxWShpD250JDhykKIsGdQm23GzB/qr4MJ6R+pcvLgr+KbVtsskohr//M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lVj3iHaD; 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="lVj3iHaD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA05B1F000FF; Wed, 23 Sep 2026 14:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790173892; bh=GP6s44sND9OP4lf9+wwxEoLgp8OXQXpeXUp7Wos6YVM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lVj3iHaD3LA0ynHQfT+wQCnnnzTfszxC/6HIvzI6KAy6Yy2ZX7T7OQOW6lWpdVWdn 0+yiTMRrvnjtAGaG+IYvawtYOwQGsNjcMl/vCwRPojX6RMD8rWUc7MN7lgC2f++8QT vAs8nVN0KOTXKt2zpHjV3hUT7Ig4BfPbSSZiZwE4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tzung-Bi Shih , Guenter Roeck Subject: [PATCH 7.2 378/438] watchdog: rtd119x: Avoid division by zero Date: Wed, 23 Sep 2026 16:06:39 +0200 Message-ID: <20260923140654.662856112@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140644.756254324@linuxfoundation.org> References: <20260923140644.756254324@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 7.2-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;