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/bootmem-remove-the-vmemmap-pages-from-kmemleak-in-put_page_bootmem.patch This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Liu Shixin <liushixin2@xxxxxxxxxx> 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@xxxxxxxxxx Fixes: f41f2ed43ca5 (mm: hugetlb: free the vmemmap pages associated with each HugeTLB page) Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx> Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx> Cc: Oscar Salvador <osalvador@xxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxxx 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