fs/ntfs3: Fix a resource leak bug in wnd_extend()

Add put_bh() to decrease the refcount of 'bh' after the job
is finished, preventing a resource leak.

Fixes: 3f3b442 ("fs/ntfs3: Add bitmap")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

Author: Haoxiang Li

fs/ntfs3/bitmap.c

@@ -1371,6 +1371,7 @@ int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits)
 		mark_buffer_dirty(bh);
 		unlock_buffer(bh);
 		/* err = sync_dirty_buffer(bh); */
+		put_bh(bh);
 
 		b0 = 0;
 		bits -= op;