[PATCH] mm/damon/dbgfs: fix memory leak when using debugfs_lookup()

[Greg Kroah-Hartman]

When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time.  Fix this up by properly
calling dput().

Cc: SeongJae Park <sj@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: damon@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 mm/damon/dbgfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c
index cb8a7e9926a4..dfb6ef8c83e0 100644
--- a/mm/damon/dbgfs.c
+++ b/mm/damon/dbgfs.c
@@ -915,6 +915,7 @@ static int dbgfs_rm_context(char *name)
 		new_ctxs[j++] = dbgfs_ctxs[i];
 	}
 
+	dput(dir);
 	kfree(dbgfs_dirs);
 	kfree(dbgfs_ctxs);
 
-- 
2.37.3