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alloc_tag: mark pages reserved during CMA activation as not tagged

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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: d224eb0287 ("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>
This commit is contained in:
Suren Baghdasaryan 2024-08-13 08:07:57 -07:00 committed by Andrew Morton
parent a8fc28dad6
commit 766c163c20
1 changed files with 2 additions and 0 deletions
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2
mm/mm_init.c
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@ -2244,6 +2244,8 @@ void __init init_cma_reserved_pageblock(struct page *page)
set_pageblock_migratetype(page, MIGRATE_CMA); set_pageblock_migratetype(page, MIGRATE_CMA);
set_page_refcounted(page); set_page_refcounted(page);
/* pages were reserved and not allocated */
clear_page_tag_ref(page);
__free_pages(page, pageblock_order); __free_pages(page, pageblock_order);
adjust_managed_page_count(page, pageblock_nr_pages); adjust_managed_page_count(page, pageblock_nr_pages);