drivers: base: dd: fix memory leak with using debugfs_lookup()

[ Upstream commit 36c893d3a759ae7c91ee7d4871ebfc7504f08c40 ]

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: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230202141621.2296458-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 9ae2b5c4fc496e3bb250e6d4c180fadacbdc8169..c463173f1fb1a7c20c7d03b1338ebf67836be896 100644 (file)
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -372,7 +372,7 @@ late_initcall(deferred_probe_initcall);
 
 static void __exit deferred_probe_exit(void)
 {
-       debugfs_remove_recursive(debugfs_lookup("devices_deferred", NULL));
+       debugfs_lookup_and_remove("devices_deferred", NULL);
 }
 __exitcall(deferred_probe_exit);