--- zzzz-none-000/linux-4.4.60/mm/kasan/kasan.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/mm/kasan/kasan.c	2021-02-04 17:41:59.000000000 +0000
@@ -33,6 +33,8 @@
 #include <linux/vmalloc.h>
 #include <linux/kasan.h>
 
+#include <asm/unaligned.h>
+
 #include "kasan.h"
 #include "../slab.h"
 
@@ -233,6 +235,20 @@
 static __always_inline bool memory_is_poisoned(unsigned long addr, size_t size)
 {
 	if (__builtin_constant_p(size)) {
+		if (IS_ENABLED(CONFIG_ARM)) { /* avoid alignment faults. */
+			switch (size) {
+			case 1:
+			case 2:
+			case 4:
+			case 8:
+				return memory_is_poisoned_1(addr);
+			case 16:
+				return memory_is_poisoned_1(addr)
+					|| memory_is_poisoned_1(addr + 8);
+			default:
+				BUILD_BUG();
+			}
+		}
 		switch (size) {
 		case 1:
 			return memory_is_poisoned_1(addr);
@@ -252,7 +268,6 @@
 	return memory_is_poisoned_n(addr, size);
 }
 
-
 static __always_inline void check_memory_region(unsigned long addr,
 						size_t size, bool write)
 {
@@ -461,6 +476,13 @@
 static void register_global(struct kasan_global *global)
 {
 	size_t aligned_size = round_up(global->size, KASAN_SHADOW_SCALE_SIZE);
+	/*
+	 * Currently we do not allocate shadow for vmalloc area
+	 * Skip globals that in modules in vmalloc area.
+	 */
+	if ((unsigned long)global->beg >= VMALLOC_START
+		&& (unsigned long)global->beg < VMALLOC_END)
+		return;
 
 	kasan_unpoison_shadow(global->beg, global->size);