From ebb0ec6c4225f0d1980499eb93e7950bcbf11af8 Mon Sep 17 00:00:00 2001
From: canyie <a1364259@163.com>
Date: Wed, 2 Feb 2022 21:37:30 +0800
Subject: [PATCH] Make xmmap() returns nullptr when fails

In the constructor of mmap_data, there are two possible values when fails: nullptr if fstat() fails, and MAP_FAILED if mmap() fails, but mmap_data treated MAP_FAILED as valid address and crashes.
---
 native/jni/utils/xwrap.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/native/jni/utils/xwrap.cpp b/native/jni/utils/xwrap.cpp
index 49ae4babc..39ce56ed5 100644
--- a/native/jni/utils/xwrap.cpp
+++ b/native/jni/utils/xwrap.cpp
@@ -452,6 +452,7 @@ void *xmmap(void *addr, size_t length, int prot, int flags,
     void *ret = mmap(addr, length, prot, flags, fd, offset);
     if (ret == MAP_FAILED) {
         PLOGE("mmap");
+        return nullptr;
     }
     return ret;
 }