[PATCH AUTOSEL 5.15 28/50] USB: gadget: gr_udc: fix memory leak with using debugfs_lookup()

[Sasha Levin]

From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

[ Upstream commit 73f4451368663ad28daa67980c6dd11d83b303eb ]

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.

Cc: Jakob Koschel <jakobkoschel@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230202153235.2412790-8-gregkh@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/usb/gadget/udc/gr_udc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index 4b35739d36951..d1febde6f2c4a 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -215,7 +215,7 @@ static void gr_dfs_create(struct gr_udc *dev)
 
 static void gr_dfs_delete(struct gr_udc *dev)
 {
-	debugfs_remove(debugfs_lookup(dev_name(dev->dev), usb_debug_root));
+	debugfs_lookup_and_remove(dev_name(dev->dev), usb_debug_root);
 }
 
 #else /* !CONFIG_USB_GADGET_DEBUG_FS */
-- 
2.39.2