[PATCH AUTOSEL 5.15 27/50] USB: isp1362: fix memory leak with using debugfs_lookup()

Sasha Levin
2023-03-03T23:18:30Z

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit c26e682afc14caa87d44beed271eec8991e93c65 ]

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: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20230202153235.2412790-7-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/host/isp1362-hcd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index d8610ce8f2ecd..bc68669dfc50c 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -2170,7 +2170,7 @@ static void create_debug_file(struct isp1362_hcd *isp1362_hcd)

static void remove_debug_file(struct isp1362_hcd *isp1362_hcd)
{
- debugfs_remove(debugfs_lookup("isp1362", usb_debug_root));
+ debugfs_lookup_and_remove("isp1362", usb_debug_root);
}

/*-------------------------------------------------------------------------*/
--
2.39.2