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Subject[PATCH] uio: reset file private_data pointer after kfree
Date
From: Wang Wenhu mailto:wenhu.wang@vivo.com

The pointer private_date should be reset to null after the memory
it pointed to, which was alloced for uio_listener instance, was freed.

Signed-off-by: Wang Wenhu <wenhu.wang@vivo.com>
---
drivers/uio/uio.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 43afbb7c5ab9..1595a6eb352b 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -505,6 +505,7 @@ static int uio_open(struct inode *inode, struct file *filep)
return 0;

err_infoopen:
+ filep->private_data = NULL;
kfree(listener);

err_alloc_listener:
@@ -536,6 +537,7 @@ static int uio_release(struct inode *inode, struct file *filep)
ret = idev->info->release(idev->info, inode);
mutex_unlock(&idev->info_lock);

+ filep->private_data = NULL;
module_put(idev->owner);
kfree(listener);
put_device(&idev->dev);
--
2.25.1
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