The quilt patch titled
Subject: mm/page_alloc: init local variable buddy_pfn
has been removed from the -mm tree. Its filename was
mm-page_alloc-init-local-variable-buddy_pfn.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/page_alloc: init local variable buddy_pfn
Date: Fri, 16 Sep 2022 15:22:54 +0800
The local variable buddy_pfn could be passed to buddy_merge_likely()
without initialization if the passed in order is MAX_ORDER - 1. This
looks buggy but buddy_pfn won't be used in this case as there's a order >=
MAX_ORDER - 2 check. Init buddy_pfn to 0 anyway to avoid possible future
misuse.
Link: https://lkml.kernel.org/r/20220916072257.9639-14-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_alloc.c~mm-page_alloc-init-local-variable-buddy_pfn
+++ a/mm/page_alloc.c
@@ -1113,7 +1113,7 @@ static inline void __free_one_page(struc
int migratetype, fpi_t fpi_flags)
{
struct capture_control *capc = task_capc(zone);
- unsigned long buddy_pfn;
+ unsigned long buddy_pfn = 0;
unsigned long combined_pfn;
struct page *buddy;
bool to_tail;
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
