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

Greg Kroah-Hartman
2022-09-02T13:36:30Z

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@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: damon@lists.linux.dev
Cc: linux-mm@kvack.org
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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