Add KORE_PENDANTIC_MALLOC option.

This option tells Kore to zero out memory when allocated, freed or
when get/put from the pools.

Makefile

@@ -18,6 +18,10 @@ ifneq ("$(DEBUG)", "")
 	CFLAGS+=-DKORE_DEBUG
 endif
 
+ifneq ("$(KORE_PEDANTIC_MALLOC)", "")
+	CFLAGS+=-DKORE_PEDANTIC_MALLOC
+endif
+
 ifneq ("$(PGSQL)", "")
 	S_SRC+=contrib/postgres/kore_pgsql.c
 	LDFLAGS+=-L$(shell pg_config --libdir) -lpq

includes/kore.h

@@ -387,6 +387,10 @@ void		*kore_realloc(void *, size_t);
 void		kore_mem_free(void *);
 void		kore_mem_init(void);
 
+#if defined(KORE_PEDANTIC_MALLOC)
+void		explicit_bzero(void *, size_t);
+#endif
+
 void		*kore_pool_get(struct kore_pool *);
 void		kore_pool_put(struct kore_pool *, void *);
 void		kore_pool_init(struct kore_pool *, char *,

src/mem.c

@@ -55,6 +55,10 @@ kore_malloc(size_t len)
 	mem = KORE_MEMINFO(addr);
 	mem->magic = KORE_MEM_MAGIC;
 
+#if defined(KORE_PEDANTIC_MALLOC)
+	explicit_bzero(addr, len);
+#endif
+
 	return (addr);
 }
 
@@ -95,6 +99,10 @@ kore_mem_free(void *ptr)
 	if (mem->magic != KORE_MEM_MAGIC)
 		fatal("kore_mem_free(): magic boundary not found");
 
+#if defined(KORE_PEDANTIC_MALLOC)
+	explicit_bzero(ptr, KORE_MEMSIZE(ptr));
+#endif
+
 	addr = (u_int8_t *)ptr - sizeof(u_int32_t);
 	free(addr);
 }
@@ -111,3 +119,9 @@ kore_strdup(const char *str)
 
 	return (nstr);
 }
+
+void
+explicit_bzero(void *addr, size_t len)
+{
+	bzero(addr, len);
+}

src/pool.c

@@ -63,6 +63,10 @@ kore_pool_get(struct kore_pool *pool)
 
 	pool->inuse++;
 
+#if defined(KORE_PEDANTIC_MALLOC)
+	explicit_bzero(ptr, pool->elen);
+#endif
+
 	return (ptr);
 }
 
@@ -71,6 +75,10 @@ kore_pool_put(struct kore_pool *pool, void *ptr)
 {
 	struct kore_pool_entry		*entry;
 
+#if defined(KORE_PEDANTIC_MALLOC)
+	explicit_bzero(ptr, pool->elen);
+#endif
+
 	entry = (struct kore_pool_entry *)
 	    ((u_int8_t *)ptr - sizeof(struct kore_pool_entry));