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 CD84123D2B1 for ; Thu, 4 Jun 2026 23:49:03 +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=1780616944; cv=none; b=EO+02dse74H93RtSjUVurd94WC8SfVdaWT4fkgBQBOfphwVxOmW6WXBLXuZ0VhJpbPFfJ3uJPpOYCfQ7+/RiEDDjOa48jSY0uMxiObrqUORHGOn9nPADFIR6Frwo93QNabOsKt/HnLEuYJKRhioDLIAsA8hj8qG7RuRkQqPgwdU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780616944; c=relaxed/simple; bh=O4PDZbDnXWuNAYquRFCuqIe7IszbssvURL9HaT1KG5Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DWoI935rs31bJe5ZBlcYIImKcnsfRLn8nhtutteKiYDVt1ksnRe5KJM6E+01Hy8+W48kHRqUgoEdbt2/iLMydUmECkna8KbR5Sl4AM3v9K1+SZNg9jgfHqCLXvusHk6MvCSZsFCXHiVJoluJSo8b49QuIm7BXU9xCyS2pi2csyc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QC7xqhSH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QC7xqhSH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 283441F00898; Thu, 4 Jun 2026 23:49:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780616943; bh=gAtqo9cjLqEFmXHTps0e0su8tHFGAIt/h9zkXch/fZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=QC7xqhSHUKFWEhSOoa+kMJ+KcU1MtGyRGcMLOtq4rCuu6tWByr3Vc3/J8RIr95GhY foXZGnYpImoOGVKMbSqyHrHRzZVJoNvjHy+7nUG8uRgFtS2pjhXaviyApiH4T3qiYb WSdpCFdBK1OkPY4Fw8zzsIQ6UNIwiVZfXS0lMXKuwc71Mck0+jLwF5GKkRZ4R6ZJwQ R9peAA5PyirYpQU6RRzLNS2ENCQygWk4FCccOOeV/UFbAR6tp3+frvfeIXZ3tuPSCU KcgeFr4Cm29b/GDnLehuPPT1fp4YYEktWmHCWSMhFo5guXmqBdFuV0hDj/IBaNiyV9 WGzBnL5AEuqWQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Antoniu Miclaus , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 5.10.y 2/2] iio: chemical: scd30: fix division by zero in write_raw Date: Thu, 4 Jun 2026 19:49:00 -0400 Message-ID: <20260604234900.2467781-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260604234900.2467781-1-sashal@kernel.org> References: <2026060457-rubdown-rival-345e@gregkh> <20260604234900.2467781-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Antoniu Miclaus [ Upstream commit 5aba4f94b225617a55fed442a70329b2ee19c0a5 ] Add a zero check for val2 before using it as a divisor when setting the sampling frequency. A user writing a zero fractional part to the sampling_frequency sysfs attribute triggers a division by zero in the kernel. Fixes: 64b3d8b1b0f5 ("iio: chemical: scd30: add core driver") Signed-off-by: Antoniu Miclaus Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/chemical/scd30_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c index 10d44a14ac62f8..1f1b93f722cd2d 100644 --- a/drivers/iio/chemical/scd30_core.c +++ b/drivers/iio/chemical/scd30_core.c @@ -257,7 +257,7 @@ static int scd30_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const guard(mutex)(&state->lock); switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: - if (val) + if (val || !val2) return -EINVAL; val = 1000000000 / val2; -- 2.53.0