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 5735935DA78; Tue, 16 Jun 2026 19:09:46 +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=1781636987; cv=none; b=dzn2+Y4TUKt3YTLEgx9/6ah7FlIJ8KhxDS/iZS8aPnrkQosgYJW0ZOrF4dVYstQutWP2U7Qw6kK3awVTOmMff61g9sUQIC03Tu8wWFK/UruMchZnul31u3aAK4c3TV85LphfkV2MdCnOJ48gJM0WMKSUucCtSbSy0n3sb2EutuM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781636987; c=relaxed/simple; bh=CYl+JudXYw9QPWHxVMZI777FEZVmWqLhmdJivIMb7ko=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UjHkGM9P9chIZ4ZnqfLqNUnGoZrqwwPtuZOUPPk5RlP+R0xjExQ76nxGd1jGtVA0Rp6tKf4Z4tU850IC9RbtqGKvaonxdjCk+lUXgzes5PAcXIC5R33PuOM0zyP0l1bHy2sXbucNmJNdDT0oOaohDKAp+CAvrrCH64lR7k+yGfk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eUQ2VTEB; 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="eUQ2VTEB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 599461F000E9; Tue, 16 Jun 2026 19:09:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781636986; bh=IdejpBWN5C0rFAG6x6AM1zvK6myP6fnsGVJFI/nqBrs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=eUQ2VTEBGAUog6P+wB7x9WJEiioQHc0rdtn9+FVh7W8zHBY6eac8YotluyElPoP9c CRiYZ2Fj/Gm7UWVV+ZhjJQIjbXcGLToWE2ZUXVpPV+Uedb/BZi7n0szxvuLdPhT9dN YrgnmdGbNa6J5RgpTAIuLUD1QBlvX53Rb8hC2/WA= 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 5.10 322/342] iio: chemical: scd30: fix division by zero in write_raw Date: Tue, 16 Jun 2026 20:30:18 +0530 Message-ID: <20260616145103.564003443@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145048.348037099@linuxfoundation.org> References: <20260616145048.348037099@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 5.10-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;