--- mm/slub.c

+++ mm/slub.c

@@ -31,6 +31,10 @@

#include <trace/events/kmem.h>

+#ifdef CONFIG_SEC_DEBUG_DOUBLE_FREE

+#include <mach/sec_debug.h>

+#endif

+

/*

* Lock order:

* 1. slab_lock(page)

@@ -3003,6 +3007,11 @@ void kfree(const void *x)

{

struct page *page;

void *object = (void *)x;

+ #ifdef CONFIG_SEC_DEBUG_DOUBLE_FREE

+ object = x = kfree_hook(x, __builtin_return_address(0));

+ if (!x)

+ return;

+ #endif

trace_kfree(_RET_IP_, x);