This is a note to let you know that I've just added the patch titled
USB: gadget: lpc32xx_udc: fix memory leak with using debugfs_lookup()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-gadget-lpc32xx_udc-fix-memory-leak-with-using-de.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5a86a6d2f275f34eab505c76abe10ad354315ae5
Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Thu Feb 2 16:32:32 2023 +0100
USB: gadget: lpc32xx_udc: fix memory leak with using debugfs_lookup()
[ Upstream commit e3965acaf3739fde9d74ad82979b46d37c6c208f ]
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>
Cc: Miaoqian Lin <linmq006@xxxxxxxxx>
Acked-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230202153235.2412790-10-gregkh@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index 865de8db998a9..ec0d3d74d66e2 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -532,7 +532,7 @@ static void create_debug_file(struct lpc32xx_udc *udc)
static void remove_debug_file(struct lpc32xx_udc *udc)
{
- debugfs_remove(debugfs_lookup(debug_filename, NULL));
+ debugfs_lookup_and_remove(debug_filename, NULL);
}
#else
