1 files changed, 34 insertions, 4 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 1c95077..2701419 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -18,6 +18,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/kmemtrace.h>
+#include <linux/kmemcheck.h>
 #include <linux/cpu.h>
 #include <linux/cpuset.h>
 #include <linux/kmemleak.h>
@@ -147,7 +148,7 @@
 		SLAB_TRACE | SLAB_DESTROY_BY_RCU | SLAB_NOLEAKTRACE)
 
 #define SLUB_MERGE_SAME (SLAB_DEBUG_FREE | SLAB_RECLAIM_ACCOUNT | \
-		SLAB_CACHE_DMA)
+		SLAB_CACHE_DMA | SLAB_NOTRACK)
 
 #ifndef ARCH_KMALLOC_MINALIGN
 #define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)
@@ -1071,6 +1072,8 @@ static inline struct page *alloc_slab_page(gfp_t flags, int node,
 {
 	int order = oo_order(oo);
 
+	flags |= __GFP_NOTRACK;
+
 	if (node == -1)
 		return alloc_pages(flags, order);
 	else
@@ -1098,6 +1101,24 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
 
 		stat(get_cpu_slab(s, raw_smp_processor_id()), ORDER_FALLBACK);
 	}
+
+	if (kmemcheck_enabled
+		&& !(s->flags & (SLAB_NOTRACK | DEBUG_DEFAULT_FLAGS)))
+	{
+		int pages = 1 << oo_order(oo);
+
+		kmemcheck_alloc_shadow(page, oo_order(oo), flags, node);
+
+		/*
+		 * Objects from caches that have a constructor don't get
+		 * cleared when they're allocated, so we need to do it here.
+		 */
+		if (s->ctor)
+			kmemcheck_mark_uninitialized_pages(page, pages);
+		else
+			kmemcheck_mark_unallocated_pages(page, pages);
+	}
+
 	page->objects = oo_objects(oo);
 	mod_zone_page_state(page_zone(page),
 		(s->flags & SLAB_RECLAIM_ACCOUNT) ?
@@ -1171,6 +1192,8 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
 		__ClearPageSlubDebug(page);
 	}
 
+	kmemcheck_free_shadow(page, compound_order(page));
+
 	mod_zone_page_state(page_zone(page),
 		(s->flags & SLAB_RECLAIM_ACCOUNT) ?
 		NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
@@ -1626,7 +1649,9 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
 	if (unlikely((gfpflags & __GFP_ZERO) && object))
 		memset(object, 0, objsize);
 
+	kmemcheck_slab_alloc(s, gfpflags, object, c->objsize);
 	kmemleak_alloc_recursive(object, objsize, 1, s->flags, gfpflags);
+
 	return object;
 }
 
@@ -1759,6 +1784,7 @@ static __always_inline void slab_free(struct kmem_cache *s,
 	kmemleak_free_recursive(x, s->flags);
 	local_irq_save(flags);
 	c = get_cpu_slab(s, smp_processor_id());
+	kmemcheck_slab_free(s, object, c->objsize);
 	debug_check_no_locks_freed(object, c->objsize);
 	if (!(s->flags & SLAB_DEBUG_OBJECTS))
 		debug_check_no_obj_freed(object, c->objsize);
@@ -2633,7 +2659,8 @@ static noinline struct kmem_cache *dma_kmalloc_cache(int index, gfp_t flags)
 
 	if (!s || !text || !kmem_cache_open(s, flags, text,
 			realsize, ARCH_KMALLOC_MINALIGN,
-			SLAB_CACHE_DMA|__SYSFS_ADD_DEFERRED, NULL)) {
+			SLAB_CACHE_DMA|SLAB_NOTRACK|__SYSFS_ADD_DEFERRED,
+			NULL)) {
 		kfree(s);
 		kfree(text);
 		goto unlock_out;
@@ -2727,9 +2754,10 @@ EXPORT_SYMBOL(__kmalloc);
 
 static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 {
-	struct page *page = alloc_pages_node(node, flags | __GFP_COMP,
-						get_order(size));
+	struct page *page;
 
+	flags |= __GFP_COMP | __GFP_NOTRACK;
+	page = alloc_pages_node(node, flags, get_order(size));
 	if (page)
 		return page_address(page);
 	else
@@ -4412,6 +4440,8 @@ static char *create_unique_id(struct kmem_cache *s)
 		*p++ = 'a';
 	if (s->flags & SLAB_DEBUG_FREE)
 		*p++ = 'F';
+	if (!(s->flags & SLAB_NOTRACK))
+		*p++ = 't';
 	if (p != name + 1)
 		*p++ = '-';
 	p += sprintf(p, "%07d", s->size);