linux-kernel - [PATCH 4.4 71/75] iio: imu: adis16400: release allocated memory on failure

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Date:   Mon, 15 Mar 2021 14:52:25 +0100
From:   gregkh@...uxfoundation.org
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Navid Emamdoost <navid.emamdoost@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Subject: [PATCH 4.4 71/75] iio: imu: adis16400: release allocated memory on failure

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

From: Navid Emamdoost <navid.emamdoost@...il.com>

commit ab612b1daf415b62c58e130cb3d0f30b255a14d0 upstream.

In adis_update_scan_mode, if allocation for adis->buffer fails,
previously allocated adis->xfer needs to be released.

Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iio/imu/adis_buffer.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/iio/imu/adis_buffer.c
+++ b/drivers/iio/imu/adis_buffer.c
@@ -39,8 +39,11 @@ int adis_update_scan_mode(struct iio_dev
 		return -ENOMEM;
 
 	adis->buffer = kzalloc(indio_dev->scan_bytes * 2, GFP_KERNEL);
-	if (!adis->buffer)
+	if (!adis->buffer) {
+		kfree(adis->xfer);
+		adis->xfer = NULL;
 		return -ENOMEM;
+	}
 
 	rx = adis->buffer;
 	tx = rx + scan_count;