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=1794064284; b=koFjj70S8vafYDzP4rraKypDIHTSm1zXuegNtBTZE+cJPwuMiAy6EnfiexOURHBD/aNk 4RZyD6o0kbl2+pqtdetmJ4vPk0/MdMJLcc8Uz7QwIKEm5F07QPgnXO4iZqEOA+4cbz3xR 6myuKYLcdPo3CZi5gcQf1pSfOp7n833HnIODC/V1KbBJRySAvVvOluV7tN807eY5cfX+9 WjfXLzrk/50+XKoD88mqKAKmWq3Vvsf+ZIlVg9K433nyKH+BXZE0r4SXQXX12aT/9uJmw kg0PPuZwBxz12CkVPYQLITyekV3+9brNDPmGGwSHDNC2KzHnG8r1gN+aICbFkMKuDpg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064284; 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=smv/4FZizouWjAXOg8Zu7NSnnPvNbMr2arwunpH61ik=; b=wpTlYJkl9nBQwxCE1Tk76a/bQJwtTRaB8fXYdCx/2qmpdvjIr+lMqFS7c8heVJw1rHvI rNF3v/1jeQXeMSJAhiH69jQrOtj4Ks60dMJnl9PE3iWEotrQWiLjbeUqPoaW6sVmMIARo FAHQoask5dR7wFYRSq03uHtEQfFXGiVbLsRfJc0wlJD4H25TnEgYSVpWJK8DFy0CbQou/ fwFhO3dmEDgwfndaAx5VZbeHzoocexy5KpHQSCDU3uzFmG5ppNECtVAa3snekrEW3qICL sOeWxMMlzde+AolJBmvc8XxpQeyPTEjCWYOjPrMcKEoZ/pRzoqbPhtiI+UKRNsT05TA== 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=FvtyPdCm; 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 6DED9606A9E5; Sat, 7 Nov 2026 15:11:24 +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=FvtyPdCm Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1ADC51F0089F; Sat, 7 Nov 2026 15:11:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064284; bh=smv/4FZizouWjAXOg8Zu7NSnnPvNbMr2arwunpH61ik=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FvtyPdCmQS1yznX5eIqOtRAfwS6tdhJ6E0yCkzndTlqg9XNebnTeRySU5FO1Yjaiz lCggScrkXW0OQl7PICgLiMIsu1KSZOM0fkUH/wNJYTmPLzmN+GBAPFGxpaE/i+kh5x sIQ9CUtcol/kYydy9xAThMF4IZHHmWf1+5wyIJkQ= 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 7.3 0341/1257] iio: adc: mcp3911: reject devices without match data Date: Sat, 7 Nov 2026 08:43:57 -0500 Message-ID: <20261107134948.821450396@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@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 7.3-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 797424f59f74b..90167930f9132 100644 --- a/drivers/iio/adc/mcp3911.c +++ b/drivers/iio/adc/mcp3911.c @@ -721,6 +721,8 @@ 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