From 766c163c2068b45330664fb67df67268e588a22d Mon Sep 17 00:00:00 2001 From: Suren Baghdasaryan Date: Tue, 13 Aug 2024 08:07:57 -0700 Subject: alloc_tag: mark pages reserved during CMA activation as not tagged During CMA activation, pages in CMA area are prepared and then freed without being allocated. This triggers warnings when memory allocation debug config (CONFIG_MEM_ALLOC_PROFILING_DEBUG) is enabled. Fix this by marking these pages not tagged before freeing them. Link: https://lkml.kernel.org/r/20240813150758.855881-2-surenb@google.com Fixes: d224eb0287fb ("codetag: debug: mark codetags for reserved pages as empty") Signed-off-by: Suren Baghdasaryan Acked-by: David Hildenbrand Cc: Kees Cook Cc: Kent Overstreet Cc: Pasha Tatashin Cc: Sourav Panda Cc: Vlastimil Babka Cc: [6.10] Signed-off-by: Andrew Morton --- mm/mm_init.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'mm/mm_init.c') diff --git a/mm/mm_init.c b/mm/mm_init.c index adc3127573cd..51960079875b 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -2244,6 +2244,8 @@ void __init init_cma_reserved_pageblock(struct page *page) set_pageblock_migratetype(page, MIGRATE_CMA); set_page_refcounted(page); + /* pages were reserved and not allocated */ + clear_page_tag_ref(page); __free_pages(page, pageblock_order); adjust_managed_page_count(page, pageblock_nr_pages); -- cgit v1.2.3