On 03/05/2018 01:14 PM, Khalid Aziz wrote: > Are you suggesting that vma returned by find_vma() could be split or > merged underneath me if I do not hold mmap_sem and thus make the flag > check invalid? If so, that is a good point.
This part does make me think that this code hasn't been tested very thoroughly. Could you describe the testing that you have done? For MPX and protection keys, I added something to tools/testing/selftests/x86, for instance.
