diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/kasan/common.c | 11 | ||||
| -rw-r--r-- | mm/slab_common.c | 3 |
2 files changed, 13 insertions, 1 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 0cd583d2fe1c..b25167664ead 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -86,6 +86,17 @@ asmlinkage void kasan_unpoison_task_stack_below(const void *watermark) } #endif /* CONFIG_KASAN_STACK */ +/* + * Only allow cache merging when stack collection is disabled and no metadata + * is present. + */ +slab_flags_t __kasan_never_merge(void) +{ + if (kasan_stack_collection_enabled()) + return SLAB_KASAN; + return 0; +} + void __kasan_alloc_pages(struct page *page, unsigned int order) { u8 tag; diff --git a/mm/slab_common.c b/mm/slab_common.c index 573fbacd9ef5..e981c80d216c 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -18,6 +18,7 @@ #include <linux/seq_file.h> #include <linux/proc_fs.h> #include <linux/debugfs.h> +#include <linux/kasan.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> #include <asm/page.h> @@ -53,7 +54,7 @@ static DECLARE_WORK(slab_caches_to_rcu_destroy_work, */ #define SLAB_NEVER_MERGE (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \ SLAB_TRACE | SLAB_TYPESAFE_BY_RCU | SLAB_NOLEAKTRACE | \ - SLAB_FAILSLAB | SLAB_KASAN) + SLAB_FAILSLAB | kasan_never_merge()) #define SLAB_MERGE_SAME (SLAB_RECLAIM_ACCOUNT | SLAB_CACHE_DMA | \ SLAB_CACHE_DMA32 | SLAB_ACCOUNT) |