6.10-stable review patch. If anyone has any objections, please let me know.
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From: Suren Baghdasaryan surenb@google.com
commit 766c163c2068b45330664fb67df67268e588a22d upstream.
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 surenb@google.com Acked-by: David Hildenbrand david@redhat.com Cc: Kees Cook keescook@chromium.org Cc: Kent Overstreet kent.overstreet@linux.dev Cc: Pasha Tatashin pasha.tatashin@soleen.com Cc: Sourav Panda souravpanda@google.com Cc: Vlastimil Babka vbabka@suse.cz Cc: stable@vger.kernel.org [6.10] Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/mm_init.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -2293,6 +2293,8 @@ void __init init_cma_reserved_pageblock(
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);