From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.3]) (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 CAF2249E128; Fri, 25 Sep 2026 12:58:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.3 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790341111; cv=none; b=q+1xXnQFhxUKvJNK/TZvSyI3rsxe3lg9rZdngZi/F0/53I+xBAu+Jfa9wbwMLPx4smTv0qgEeO1wLJqtylFJ9ry2Ov1bPYzCqbnhr4dKxkUJPVTIMi9o7opxC8bzrAhDYzSQI1qQSQKixiy4qeK/DtwOlRHtL0PqgAwjZ0drmj4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790341111; c=relaxed/simple; bh=O76mNZ2wkvNEqIG1GzgONVOSWQLTBNeqNB7hToscR9k=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VQdiEwPVpiZlgCI/WtdMDQD4/fmifZlpWuMjMiyhG6Wj/hlkyDWguvlP/RUiU1Onx2PnS3A7Gzci8SbFO51O562Tyk3W4hG5Ea9N/i43tPwHgsRalsE4xrAU6cC6ZEwopv9MchC5SwoxeBsYnS5U2bAxLNmt4fA6z+Tm9NXy8s8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=mp1dZJEr; arc=none smtp.client-ip=117.135.210.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="mp1dZJEr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=4Q qz2/0CCP9m1HgUWpanFEn4lYQPD/5TUZ3jIsrFpuQ=; b=mp1dZJErQGnhZWxNHX HWLOZ/vV54yu+QP/I6DIlSPL80AK6jK5bPYSh4Iv/y2NLMCCrlLhNeSfnm3wdQc5 2sK6qhR4sJh1Ik4AjCZGyA34u703I6t2kW1+J52HPU9GeY/w4u74YCdLXOZNZi/L kecKoL8JVn1TNvGfEAmOu9EaI= Received: from pc.localdomain (unknown []) by gzga-smtp-mtada-g1-0 (Coremail) with SMTP id _____wD3f3zUb7ZqOLTlAg--.28269S6; Fri, 25 Sep 2026 20:58:03 +0800 (CST) From: Jiale Yao To: Ramona Bolboaca , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Krzysztof Kozlowski , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jiale Yao , stable@vger.kernel.org Subject: [PATCH 4/9] iio: adc: max11205: reject devices without match data Date: Fri, 25 Sep 2026 20:57:42 +0800 Message-Id: <20260925125754.2162337-5-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260925125754.2162337-1-yaojiale02@163.com> References: <20260925125754.2162337-1-yaojiale02@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wD3f3zUb7ZqOLTlAg--.28269S6 X-Coremail-Antispam: 1Uf129KBjvJXoW7tw15uF1xGr43CFy5urW8Crg_yoW8Jw13pF WjkF90kry5CF47Gw4DGa4jkFy5J3Z0ya1fKa4Sgw1v9rW5CFyUZryIga4FqryrtFWrCa4q yF47Jr1rWas7Zr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pEAhL5UUUUU= X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzRtalGq2b9ubLwAA3E 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. max11205_probe() immediately dereferences the returned chip information to set the IIO device name, 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 using the chip information. Fixes: bf3c855be801 ("iio: adc: max11205: simplify with spi_get_device_match_data()") Cc: stable@vger.kernel.org Signed-off-by: Jiale Yao --- drivers/iio/adc/max11205.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/adc/max11205.c b/drivers/iio/adc/max11205.c index 63b6561dcf47..53ac2f4f383e 100644 --- a/drivers/iio/adc/max11205.c +++ b/drivers/iio/adc/max11205.c @@ -117,6 +117,8 @@ static int max11205_probe(struct spi_device *spi) ad_sd_init(&st->sd, indio_dev, spi, &max11205_sigma_delta_info); st->chip_info = spi_get_device_match_data(spi); + if (!st->chip_info) + return -ENODATA; indio_dev->name = st->chip_info->name; indio_dev->modes = INDIO_DIRECT_MODE; -- 2.34.1