[PATCH] misc: uacce - add the null check for the input pointer and its pointer members

[Chenghai Huang]

The uacce_alloc() is the member of the EXPORT_SYMBOL_GPL. Therefore, null
pointer verification is added on the pointer type input parameter and its
pointer members.

Signed-off-by: Chenghai Huang <huangchenghai2@xxxxxxxxxx>
---
 drivers/misc/uacce/uacce.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/misc/uacce/uacce.c b/drivers/misc/uacce/uacce.c
index bdc2e6fda782..964f1a6a16e0 100644
--- a/drivers/misc/uacce/uacce.c
+++ b/drivers/misc/uacce/uacce.c
@@ -514,6 +514,9 @@ struct uacce_device *uacce_alloc(struct device *parent,
 	struct uacce_device *uacce;
 	int ret;
 
+	if (!parent || !interface || !interface->ops)
+		return ERR_PTR(-EINVAL);
+
 	uacce = kzalloc(sizeof(struct uacce_device), GFP_KERNEL);
 	if (!uacce)
 		return ERR_PTR(-ENOMEM);
-- 
2.30.0