From: Zi Yan ziy@nvidia.com
When dealing with hugetlb pages, manipulating struct page pointers directly can get to wrong struct page, since struct page is not guaranteed to be contiguous on SPARSEMEM without VMEMMAP. Use nth_page() to handle it properly.
Fixes: 2813b9c02962 ("kasan, mm, arm64: tag non slab memory allocated via pagealloc") Cc: stable@vger.kernel.org Signed-off-by: Zi Yan ziy@nvidia.com Reviewed-by: Muchun Song songmuchun@bytedance.com --- mm/cma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/cma.c b/mm/cma.c index da2967c6a223..2b2494fd6b59 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -505,7 +505,7 @@ struct page *cma_alloc(struct cma *cma, unsigned long count, */ if (page) { for (i = 0; i < count; i++) - page_kasan_tag_reset(page + i); + page_kasan_tag_reset(nth_page(page, i)); }
if (ret && !no_warn) {