diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 884c13be9..1139bde1d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -872,6 +872,8 @@ static bool free_pages_prepare(struct page *page, unsigned int order) int i; int bad = 0; + unsigned long index = 1UL << order; + trace_mm_page_free(page, order); kmemcheck_free_shadow(page, order); kasan_free_pages(page, order); @@ -888,6 +890,10 @@ static bool free_pages_prepare(struct page *page, unsigned int order) debug_check_no_obj_freed(page_address(page), PAGE_SIZE << order); } + + for (; index; --index) + sanitize_highpage(page + index - 1); + arch_free_page(page, order); kernel_map_pages(page, 1 << order, 0); @@ -1096,6 +1102,8 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags) { int i; + unsigned long index = 1UL << order; + for (i = 0; i < (1 << order); i++) { struct page *p = page + i; if (unlikely(check_new_page(p))) @@ -1109,8 +1117,8 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags) kernel_map_pages(page, 1 << order, 1); kasan_alloc_pages(page, order); - if (gfp_flags & __GFP_ZERO) - prep_zero_page(page, order, gfp_flags); + for (; index; --index) + sanitize_highpage_verify(page + index - 1); if (order && (gfp_flags & __GFP_COMP)) prep_compound_page(page, order); |