slub: fix SLUB_RESILIENCY_TEST for dynamic kmalloc caches

Now that the kmalloc_caches array is dynamically allocated at boot,
SLUB_RESILIENCY_TEST needs to be fixed to pass the correct type.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

mm/slub.c

@@ -3498,6 +3498,8 @@ static void resiliency_test(void)
 {
 	u8 *p;
 
+	BUILD_BUG_ON(KMALLOC_MIN_SIZE > 16 || SLUB_PAGE_SHIFT < 10);
+
 	printk(KERN_ERR "SLUB resiliency testing\n");
 	printk(KERN_ERR "-----------------------\n");
 	printk(KERN_ERR "A. Corruption after allocation\n");
@@ -3507,7 +3509,7 @@ static void resiliency_test(void)
 	printk(KERN_ERR "\n1. kmalloc-16: Clobber Redzone/next pointer"
 			" 0x12->0x%p\n\n", p + 16);
 
-	validate_slab_cache(kmalloc_caches + 4);
+	validate_slab_cache(kmalloc_caches[4]);
 
 	/* Hmmm... The next two are dangerous */
 	p = kzalloc(32, GFP_KERNEL);
@@ -3517,7 +3519,7 @@ static void resiliency_test(void)
 	printk(KERN_ERR
 		"If allocated object is overwritten then not detectable\n\n");
 
-	validate_slab_cache(kmalloc_caches + 5);
+	validate_slab_cache(kmalloc_caches[5]);
 	p = kzalloc(64, GFP_KERNEL);
 	p += 64 + (get_cycles() & 0xff) * sizeof(void *);
 	*p = 0x56;
@@ -3525,27 +3527,27 @@ static void resiliency_test(void)
 									p);
 	printk(KERN_ERR
 		"If allocated object is overwritten then not detectable\n\n");
-	validate_slab_cache(kmalloc_caches + 6);
+	validate_slab_cache(kmalloc_caches[6]);
 
 	printk(KERN_ERR "\nB. Corruption after free\n");
 	p = kzalloc(128, GFP_KERNEL);
 	kfree(p);
 	*p = 0x78;
 	printk(KERN_ERR "1. kmalloc-128: Clobber first word 0x78->0x%p\n\n", p);
-	validate_slab_cache(kmalloc_caches + 7);
+	validate_slab_cache(kmalloc_caches[7]);
 
 	p = kzalloc(256, GFP_KERNEL);
 	kfree(p);
 	p[50] = 0x9a;
 	printk(KERN_ERR "\n2. kmalloc-256: Clobber 50th byte 0x9a->0x%p\n\n",
 			p);
-	validate_slab_cache(kmalloc_caches + 8);
+	validate_slab_cache(kmalloc_caches[8]);
 
 	p = kzalloc(512, GFP_KERNEL);
 	kfree(p);
 	p[512] = 0xab;
 	printk(KERN_ERR "\n3. kmalloc-512: Clobber redzone 0xab->0x%p\n\n", p);
-	validate_slab_cache(kmalloc_caches + 9);
+	validate_slab_cache(kmalloc_caches[9]);
 }
 #else
 static void resiliency_test(void) {};