From dd0ff4d12dd284c334f7e9b07f8f335af856ac78 Mon Sep 17 00:00:00 2001 From: Liu Shixin Date: Fri, 19 Aug 2022 17:40:05 +0800 Subject: [PATCH] bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem 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 Reviewed-by: Muchun Song Cc: Matthew Wilcox Cc: Mike Kravetz Cc: Oscar Salvador Cc: Signed-off-by: Andrew Morton --- mm/bootmem_info.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c index f18a631e7479..b1efebfcf94b 100644 --- a/mm/bootmem_info.c +++ b/mm/bootmem_info.c @@ -12,6 +12,7 @@ #include #include #include +#include void get_page_bootmem(unsigned long info, struct page *page, unsigned long type) { @@ -33,6 +34,7 @@ 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); } }