From: Liu Shixin liushixin2@huawei.com
maillist inclusion category: bugfix bugzilla: 187198, https://gitee.com/openeuler/kernel/issues/I5NX1S
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?...
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The vmemmap pages is marked by kmemleak when allocated from memblock. Remove it from kmemleak when freeing the page. Otherwise, when we reuse the page, kmemleak may report such an error and then stop working.
kmemleak: Cannot insert 0xffff98fb6eab3d40 into the object search tree (overlaps existing) kmemleak: Kernel memory leak detector disabled kmemleak: Object 0xffff98fb6be00000 (size 335544320): kmemleak: comm "swapper", pid 0, jiffies 4294892296 kmemleak: min_count = 0 kmemleak: count = 0 kmemleak: flags = 0x1 kmemleak: checksum = 0 kmemleak: backtrace:
Link: https://lkml.kernel.org/r/20220819094005.2928241-1-liushixin2@huawei.com Fixes: f41f2ed43ca5 (mm: hugetlb: free the vmemmap pages associated with each HugeTLB page) Signed-off-by: Liu Shixin liushixin2@huawei.com Reviewed-by: Muchun Song songmuchun@bytedance.com Cc: Matthew Wilcox willy@infradead.org Cc: Mike Kravetz mike.kravetz@oracle.com Cc: Oscar Salvador osalvador@suse.de Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Liu Shixin liushixin2@huawei.com Reviewed-by: Kefeng Wang wangkefeng.wang@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- mm/bootmem_info.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c index 5b152dba7344..12dffa051fbd 100644 --- a/mm/bootmem_info.c +++ b/mm/bootmem_info.c @@ -12,6 +12,7 @@ #include <linux/memblock.h> #include <linux/bootmem_info.h> #include <linux/memory_hotplug.h> +#include <linux/kmemleak.h>
void get_page_bootmem(unsigned long info, struct page *page, unsigned long type) { @@ -34,6 +35,7 @@ void put_page_bootmem(struct page *page) ClearPagePrivate(page); set_page_private(page, 0); INIT_LIST_HEAD(&page->lru); + kmemleak_free_part(page_to_virt(page), PAGE_SIZE); free_reserved_page(page); } }