The patch titled
Subject: bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
bootmem-remove-the-vmemmap-pages-from-kmemleak-in-free_bootmem_page.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-free_bootmem_page.patch
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@xxxxxxxxxx>
Subject: bootmem: remove the vmemmap pages from kmemleak in free_bootmem_page
Date: Thu, 18 Aug 2022 21:21:04 +0800
The vmemmap pages is marked by kmemleak when allocated from memblock.
Remove it from kmemleak when free 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/20220818132104.2144770-1-liushixin2@xxxxxxxxxx
Fixes: f41f2ed43ca5 ("mm: hugetlb: free the vmemmap pages associated with each HugeTLB page")
Signed-off-by: Liu Shixin <liushixin2@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/bootmem_info.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/include/linux/bootmem_info.h~bootmem-remove-the-vmemmap-pages-from-kmemleak-in-free_bootmem_page
+++ a/include/linux/bootmem_info.h
@@ -3,6 +3,7 @@
#define __LINUX_BOOTMEM_INFO_H
#include <linux/mm.h>
+#include <linux/kmemleak.h>
/*
* Types for free bootmem stored in page->lru.next. These have to be in
@@ -38,9 +39,10 @@ static inline void free_bootmem_page(str
*/
VM_BUG_ON_PAGE(page_ref_count(page) != 2, page);
- if (magic == SECTION_INFO || magic == MIX_SECTION_INFO)
+ if (magic == SECTION_INFO || magic == MIX_SECTION_INFO) {
+ kmemleak_free_part(page_to_virt(page), PAGE_SIZE);
put_page_bootmem(page);
- else
+ } else
VM_BUG_ON_PAGE(1, page);
}
#else
_
Patches currently in -mm which might be from liushixin2@xxxxxxxxxx are
bootmem-remove-the-vmemmap-pages-from-kmemleak-in-free_bootmem_page.patch
