From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.4]) (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 03A9234BA50; Fri, 25 Sep 2026 13:18:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790342295; cv=none; b=Biett7x5Vq/OyezWfSdxz+zXkh1NpKxauj84KIaV7dMz599MbkGf8/kWSK7CPZrzNiuqX81b5gYYEi/Tf+YyH9YHlnr7WqPTpnODBjhUPzlOr7lkLR8Yr3R4wmcP9tbbCAOk/RafqwqhxI4zKuTOvp7xnPdIBz/dV/xNDqurERo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790342295; c=relaxed/simple; bh=zvVEAZ1mK8LVnL3Pl5rFmpVZh6eDsG9D6w9pqLBc0BA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AMzaIazFmMNj/eKfWJG++H1xB1v0/PjRArorbM3/E1m5vsIxqkvQ9qAA/GdNo6+3D7J+DVhqOWkVQeZhJH3MOFmfNR19Y31O+DAiE7iFQ24ffl3DJEybEu0fBLUnp3fdvegR7DDKZ1hVLblOwwa9Dk9t9DUQvwg0SWPtudLyMS4= 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=UOzkQ/Vv; arc=none smtp.client-ip=117.135.210.4 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="UOzkQ/Vv" 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=8c mUwvQh64b0oO5LPr23TWnUKs7VBrYkq2s36X1zBTw=; b=UOzkQ/Vvdk5MGM1p6i 6KGVy0dcGGLL0tPIoTUvCX6QJexde6ApY8xQXK7nqVxX/O9upag1qL2D8iUeTus8 Xc0Yq/tDDUFlbM2Q/1ETbB9ehQFF7qqXu5lCr6at9tetFxcwNuhuxJjISqdSzrz7 +AECT4mxycj3AX2+0OW6mDMEQ= Received: from pc.localdomain (unknown []) by gzsmtp1 (Coremail) with SMTP id PCgvCgC3fy9zdLZq8jiZBA--.52716S4; Fri, 25 Sep 2026 21:17:43 +0800 (CST) From: Jiale Yao To: =?UTF-8?q?Nuno=20S=C3=A1?= , Michael Hennerich , Jonathan Cameron , David Lechner , Andy Shevchenko , Krzysztof Kozlowski , linux@analog.com, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jiale Yao Subject: [PATCH 2/7] iio: dac: ad5755: validate SPI match data Date: Fri, 25 Sep 2026 21:17:31 +0800 Message-Id: <20260925131738.2200612-3-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260925131738.2200612-1-yaojiale02@163.com> References: <20260925131738.2200612-1-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:PCgvCgC3fy9zdLZq8jiZBA--.52716S4 X-Coremail-Antispam: 1Uf129KBjvdXoWruFWDGFykuF1UGw15WFW8tFb_yoWfWFg_C3 Wfu397XryUC3WkKF40gwn8Zr9akrWjgrZ5ZwsYvF4fKrWxur1rXFn2krWUJr4kuFWxtF1D Wr1YqrZ5Z3ZxKjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sR_zVbDUUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbC7xeCvGq2dHd6sAAA3T A device bound through driver_override need not match an entry in the driver tables. In that case spi_get_device_match_data() returns NULL, but ad5755_probe() stores and later dereferences the result. Validate the match data before it is used. Fixes: 62d3fb9dcc09 ("iio: dac: ad5755: make use of of_device_id table") Signed-off-by: Jiale Yao --- drivers/iio/dac/ad5755.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c index 0828b9909099..730289dd8ef6 100644 --- a/drivers/iio/dac/ad5755.c +++ b/drivers/iio/dac/ad5755.c @@ -819,6 +819,9 @@ static int ad5755_probe(struct spi_device *spi) spi_set_drvdata(spi, indio_dev); st->chip_info = spi_get_device_match_data(spi); + if (!st->chip_info) + return -ENODATA; + st->spi = spi; st->pwr_down = 0xf; -- 2.34.1