Fix coverity issues on 8.3 branch

[dongbeiouba]

470740, 470741, 470742 Explicit null dereferenced
464373 Overflowed constant
265647 Explicit null dereferenced
464516, 456146 Structurally dead code
297397, 297533, 297551, 456144, 456113, 297761, 297738, 297685, 297667, 297378, 297643, 297577, 456151 Unchecked return value 456130, 456136 Unchecked return value from library 456133 Explicit null dereferenced
456132 Data race condition
456116 Argument cannot be negative
13896, 297759, 297445 Dereference after null check 297704 Logically dead code
13891 Division or modulo by zero

Checklist

• 在 https://yuque.com/tsdoc 增加或更新了必要的文档
• 增加或更新了必要的测试用例
• 对于重要修改，更新了CHANGES文件
• 当前修改存在对已有API参数或返回值的改变
• 当前修改存在对旧版本功能的兼容性改变（如网络协议或密码算法）