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 CEB863A7F72 for ; Thu, 4 Jun 2026 19:40:21 +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=1780602022; cv=none; b=hO4CImKdreNtKyQHyfv/iDpY/Tjf2O3omfPnZ5cnQmgXJj60+tAzSLAbznUONbsRz/cBGCN/f8/heSJy+f/VJqMztq+Yae207KvbIiWjt7qDVN3wL5FmsqqNejGvS9nNZKNSMi8Al3WyBY0F+98seegqRurhWxNw3kGZkgS4SXY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780602022; c=relaxed/simple; bh=/4xkadzyMpNBPh7LtuPXdwwOr29e8GS7U/YbxymPKT8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d8RC1VpvWpGFPsUQ5HXczIIinjzpQNuQoz/iVPhD3BLgQEnip8PAWafDR+VXcuXOP/oGEY1OpJa6wnAqN7ZvSMnRyplvqyTq7RYRDzM5BHuvyFkyUCSBkg3tUqNNiPOWZPzDyIbMAKDSQF6n+n29OD3p36dadJpqZdLAUtsRoLI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S33BFZ03; 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="S33BFZ03" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 100F71F00898; Thu, 4 Jun 2026 19:40:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780602021; bh=FdtEjzAPyzaRGmptOScglPtFP6cN3p8luNKvRDfaCZc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=S33BFZ03hNPbei+PYI00eLFMIZhAAtBAisj1JCw9Amv+gsCyRhjeET8KjkAXqfi/m pcuNElpS3VrWPuXXQnG9VnG+2xQRGupX4q10R8J0Cf902iOJmDz0FXrbEO8DV6uxcd t6EJh/Rn9vG4kiWLh+BKKfOZEMAFFSTAUhe3oYrHp1pME8OpMU/9veWFGJL76WA/Oy nk2b/8yBfo5Yi7wo/XB+GJfl2+ai5B8fNO19p8El9zDInbaBXGSwpFdLBAB+yA76Sx LRnwQMj1YB9f4m1/V5OO7JQDxpKGOUwSJxt+xvcVuKnmr9ziHOcR5JJv83bLJUY0/9 byU2wP45JbGog== From: Sasha Levin To: stable@vger.kernel.org Cc: Antoniu Miclaus , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 5.15.y 2/2] iio: chemical: scd30: fix division by zero in write_raw Date: Thu, 4 Jun 2026 15:40:17 -0400 Message-ID: <20260604194017.889785-2-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260604194017.889785-1-sashal@kernel.org> References: <2026060457-coastal-washable-cab4@gregkh> <20260604194017.889785-1-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 a0a1f89deba913..26216154c8591b 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