linux-kernel - [PATCH v3 3/4] iio: core: Switch to krealloc

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Message-Id: <20230724110204.46285-4-andriy.shevchenko@linux.intel.com>
Date:   Mon, 24 Jul 2023 14:02:03 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Nuno Sa <nuno.sa@...log.com>
Subject: [PATCH v3 3/4] iio: core: Switch to krealloc_array()

Let the krealloc_array() copy the original data and
check for a multiplication overflow.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Nuno Sa <nuno.sa@...log.com>
---
 drivers/iio/industrialio-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 118ca6b59504..13d6b6ac5ccf 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1474,7 +1474,7 @@ int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
 	const struct attribute_group **new, **old = iio_dev_opaque->groups;
 	unsigned int cnt = iio_dev_opaque->groupcounter;
 
-	new = krealloc(old, sizeof(*new) * (cnt + 2), GFP_KERNEL);
+	new = krealloc_array(old, cnt + 2, sizeof(*new), GFP_KERNEL);
 	if (!new)
 		return -ENOMEM;
 
-- 
2.40.0.1.gaa8946217a0b