The patch titled Subject: bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem has been added to the -mm mm-hotfixes-unstable branch. Its filename is bootmem-remove-the-vmemmap-pages-from-kmemleak-in-put_page_bootmem.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Liu Shixin liushixin2@huawei.com Subject: bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem Date: Fri, 19 Aug 2022 17:40:05 +0800

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 ---

mm/bootmem_info.c | 2 ++ 1 file changed, 2 insertions(+)

--- a/mm/bootmem_info.c~bootmem-remove-the-vmemmap-pages-from-kmemleak-in-put_page_bootmem +++ a/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) { @@ -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); } } _

Patches currently in -mm which might be from liushixin2@huawei.com are

bootmem-remove-the-vmemmap-pages-from-kmemleak-in-free_bootmem_page.patch bootmem-remove-the-vmemmap-pages-from-kmemleak-in-put_page_bootmem.patch