mm/vmalloc: Fix a double free in __vmalloc_node_range

ascend inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI
CVE: NA

--------------------------------------------------

The "area" is removed and freed in __vmalloc_area_node when it returned
NULL, we needn't call free_vm_area to remove and free this area again.

Fixes: 59a57a82fb2a ("mm/vmalloc: Hugepage vmalloc mappings")
Signed-off-by: NFang Lijun <fanglijun3@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

mm/vmalloc.c

@@ -2709,7 +2709,6 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
 
 fail:
 	if (shift > PAGE_SHIFT) {
-		free_vm_area(area);
 		shift = PAGE_SHIFT;
 		align = real_align;
 		size = real_size;