Dear Memory Management Maintainer,

I am Po-Hao Su, a graduate student from the Operating Systems and Embedded
Systems Lab at National Cheng Kung University in Taiwan.

I am writing in reference to report a bug in *do_mmap(...)* function.
Recently, I found that there seems a bug after *get_unmapped_area(...)
*function
is return.
*do_mmap(...) *function will check the *addr *parameter is aligned on a
page boundary or not after *get_unmapped_area(...)* function is return.
But it will return *addr *parameter, not an error(probably to *-EINVAL*)
while address not aligned on a page boundary.
Therefore, I think address not aligned on a page boundary should be an
error(*-EINVAL*).

I also discussed this issue with others when the meeting of my lab, others
views are consistent with me.
In view of this, I report the issue. Attached is the patch for this.

If this is a wrong report, I am sorry, and please show me why kernel do it,
if convenient. Thank you.
I look forward to hearing from you.

Best regards,

蘇柏豪, 研究生
作業系統與嵌入式系統實驗室,
國立成功大學資訊工程學系
Email: supohaosu@gmail.com

Po-Hao Su, Graduate Student
Operating Systems and Embedded Systems Lab,
Department of Computer Science and Information Engineering
National Cheng Kung University, Taiwan
Email: supohaosu@gmail.com