From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794063071; b=bjTle1Q2zmcYI7fSu/6Sv/BoeDnP5xpaCAwvAeAgWoheb0/3eCvbmJnCfs2FpKVQc4UF JsxVRcACI9S3he/9zbQw9/fujcErgBYvS7V6u1v+Q6ts0zslWk8ghfwPMJFt3uFQ4Qj5j oEgyk6ijC+awFMhvQELezDVdXy/OtMN2tyWgAMz0kWCNcWRDQzTU4wfJDq1gqJlP1yjkl 6wKxlkk3zcbEEspe0J7CLI5jfn81ENTEopws6MLQytEn5rrl0Q7s7j5LhODoBU1QWokzC SFrodmUghuxBvVRWR7eKzcAssiAdWKzYmSjyyXGwo0fuw6CRQBglWJMNMpq2lTwj6jA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063071; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=25dv9gFD/Sr8vOs22rAH2oczJccZyewaF90Ukh2LNcU=; b=ntz6NVf7cvOldZlNM9pZUKD9Q51o+kvQn/hsYgLtyVZTIy/q6vHT6QqCTKyhZ1xAqPFl FIL7adfopMhNgTier9wgg8sfMnSezMY23dU80xYRvbVbF0mgfvkquLl4YOvAyDOT7U+UQ sk33XtqfI3RH8gJaH+Xbes1K0dM/2Z0P///9mu6PKOf/Vsap0FeyPERxVvVjZuRwsaqkE O1+WxnHkk7nZLU6QtbTNi11oIDxOoJjwNR3H7Fv379wOnXEsNUSYirqaohi523FOg1zsY lhlZuCLmpLmT6+bSdxkus44othAXiyYaBVfVUcrcxOfDBukfiwABR9GbJwcf7wzdQRQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=n5f0RMG5; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91705606D815; Sat, 7 Nov 2026 14:51:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=n5f0RMG5 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E95A1F0089F; Sat, 7 Nov 2026 14:51:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063071; bh=25dv9gFD/Sr8vOs22rAH2oczJccZyewaF90Ukh2LNcU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=n5f0RMG5vE9xs9xDfUzOT0HMdtu1f9OHBx0HZffD+aZQUmYDDgFI5SG/9tIZHlyO2 epGEIEAO/A5kxFxWv3lwE8P3hFDH7FIYoXldYH4iy4soJaAkogqz9Fk1Z5AT6f8mLk im0tlj8q8fGeGABjijlax34lIsIouhZ4Ng4KWfr8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jiale Yao , Jonathan Cameron , Sasha Levin Subject: [PATCH 6.18 274/869] iio: adc: mcp3911: reject devices without match data Date: Sat, 7 Nov 2026 08:49:16 -0500 Message-ID: <20261107134900.951876216@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jiale Yao [ Upstream commit d3410a48d5eb9dd8238099cb0ee368d12005a385 ] SPI driver_override allows a device to bind to this driver without matching either the OF or SPI device ID table. In that case, spi_get_device_match_data() returns NULL. mcp3911_probe() stores the result and later calls through chip->config and accesses other chip-specific fields, causing a NULL pointer dereference. Commit 572a00852635 ("iio: dac: ad5686: missing NULL check on match data") fixed the same driver_override issue in another SPI driver. Reject devices without match data before continuing the probe. Fixes: 732ad34260d3 ("iio: adc: mcp3911: add support for the whole MCP39xx family") Cc: stable@vger.kernel.org Signed-off-by: Jiale Yao Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/adc/mcp3911.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c index a6f21791c6859..5bdfe5e267188 100644 --- a/drivers/iio/adc/mcp3911.c +++ b/drivers/iio/adc/mcp3911.c @@ -722,6 +722,8 @@ static int mcp3911_probe(struct spi_device *spi) adc = iio_priv(indio_dev); adc->spi = spi; adc->chip = spi_get_device_match_data(spi); + if (!adc->chip) + return -ENODATA; ret = devm_regulator_get_enable_read_voltage(dev, "vref"); if (ret < 0 && ret != -ENODEV) -- 2.53.0