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 A19D635CB87; Tue, 16 Jun 2026 17:17:54 +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=1781630275; cv=none; b=V2dAay7IsfMMQsgzkPAOaXuJznUTU5PuHyy7Eb+4n5Cd7PCOeTw/3rc4Kqdq3/EUfwFE6JzD+Q44yKV+wDEz6QZQw2e3jOOrngnWgOKLd9EvNjoLShU6Ygvgu9v72PCEJtWu2mJWR6tOHc/veJtdu2VmtiGSya28ZXCn47LcPNc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781630275; c=relaxed/simple; bh=IqLDJ6oLuCzt0DnoP/Y5NVU1mf241zw52O6rpfpWUJY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eUn1H3izK8tQ7UZqjRABlKTQX9lcl0YcDDdQRRpq8pLnoAXDX0Qe7bJuHH8/+eSogCjqgnzMQ6A2IcHcuV7HtBrQL2upztQTEkz6bbgH8EQMjCzflOJNcwhHJprBvPX2f6FOb6NXZ3XHPSotshwz4PU9g0/zi1L0VqBdHz2qVnc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=f8cW8Bdf; 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="f8cW8Bdf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89D101F00A3A; Tue, 16 Jun 2026 17:17:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781630274; bh=k5mXf+v3MzIk0ieaMpn7c2+yPs2VnONd6e3NWIfW96Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=f8cW8BdfdDalrF8vNc0NOVL7LLmwnmWcbSDn/2v/xjcn0wsoHpurHML+uQabFJyAJ WK3qpcGW7hpY64aVdoSHRmg2nukCEcRGOS76Qlfm/gLTrp5TLjVfwsrVHhTx8bJvA3 b6Weg1MmDtXcsl+ecfrCvLzylMfNmIWj1y5/Wkho= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Antoniu Miclaus , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 6.6 411/452] iio: chemical: scd30: fix division by zero in write_raw Date: Tue, 16 Jun 2026 20:30:38 +0530 Message-ID: <20260616145138.378526863@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145117.796205997@linuxfoundation.org> References: <20260616145117.796205997@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- drivers/iio/chemical/scd30_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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_de guard(mutex)(&state->lock); switch (mask) { case IIO_CHAN_INFO_SAMP_FREQ: - if (val) + if (val || !val2) return -EINVAL; val = 1000000000 / val2;