linux-kernel - [PATCH v3] driver: uio: fix possible memory leak in uio

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Date:   Thu, 3 Jan 2019 22:28:22 +0800
From:   liujian <liujian56@...wei.com>
To:     <gregkh@...uxfoundation.org>
CC:     <xiubli@...hat.com>, <liujian56@...wei.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v3] driver: uio: fix possible memory leak in uio_open

Fixes: 57c5f4df0a5a ("uio: fix crash after the device is unregistered")
Signed-off-by: liujian <liujian56@...wei.com>
---
v1->v2:
rename the "err_infoopen" to "err_idev_info"
v2->3:
put the extra info after the "--"

 drivers/uio/uio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 5c10fc7..aab3520 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -496,18 +496,19 @@ static int uio_open(struct inode *inode, struct file *filep)
 	if (!idev->info) {
 		mutex_unlock(&idev->info_lock);
 		ret = -EINVAL;
-		goto err_alloc_listener;
+		goto err_idev_info;
 	}
 
 	if (idev->info && idev->info->open)
 		ret = idev->info->open(idev->info, inode);
 	mutex_unlock(&idev->info_lock);
 	if (ret)
-		goto err_infoopen;
+		goto err_idev_info;
 
 	return 0;
 
-err_infoopen:
+err_idev_info:
+	filep->private_data = NULL;
 	kfree(listener);
 
 err_alloc_listener:
-- 
2.7.4