Fix

Author: huoyaoyuan

src/coreclr/md/enc/stgio.cpp

@@ -705,7 +705,7 @@ HRESULT StgIO::Seek(                    // New offset.
             }
 #else
             _ASSERTE(m_fd != -1);
-            loff_t offRtn = lseek(m_fd, lVal,
+            int64_t offRtn = (int64_t)lseek(m_fd, lVal,
                 fMoveType == FILE_BEGIN ? SEEK_SET :
                 (fMoveType == FILE_CURRENT ? SEEK_CUR : SEEK_END));
             if (offRtn < 0 || offRtn > UINT32_MAX)

src/coreclr/minipal/Unix/dn-memmap.cpp

@@ -34,8 +34,10 @@ MemoryMappedFile::MemoryMappedFile(const WCHAR* path)
     if (fstat(fd, &st) != 0)
         goto Fail;
 
-    if (st.st_size > SIZE_MAX)
+#ifdef TARGET_32BIT
+    if (st.st_size > INT32_MAX)
         goto Fail;
+#endif
 
     address = mmap(nullptr, (size_t)st.st_size, PROT_READ, 0, fd, 0);
     if (address == MAP_FAILED)