memblock: use kfree() to release kmalloced memblock regions

commit c94afc46cae7ad41b2ad6a99368147879f4b0e56 upstream.

memblock.{reserved,memory}.regions may be allocated using kmalloc() in
memblock_double_array(). Use kfree() to release these kmalloced regions
indicated by memblock_{reserved,memory}_in_slab.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Fixes: 3010f876500f ("mm: discard memblock data later")
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/memblock.c b/mm/memblock.c
index 5096500..2b73977 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -366,14 +366,20 @@ void __init memblock_discard(void)
                addr = __pa(memblock.reserved.regions);
                size = PAGE_ALIGN(sizeof(struct memblock_region) *
                                  memblock.reserved.max);
-               __memblock_free_late(addr, size);
+               if (memblock_reserved_in_slab)
+                       kfree(memblock.reserved.regions);
+               else
+                       __memblock_free_late(addr, size);
        }
 
        if (memblock.memory.regions != memblock_memory_init_regions) {
                addr = __pa(memblock.memory.regions);
                size = PAGE_ALIGN(sizeof(struct memblock_region) *
                                  memblock.memory.max);
-               __memblock_free_late(addr, size);
+               if (memblock_memory_in_slab)
+                       kfree(memblock.memory.regions);
+               else
+                       __memblock_free_late(addr, size);
        }
 
        memblock_memory = NULL;