Re: [LTP] [PATCH] Added test for mmap() with MAP_SHARED_VALIDATE.

Petr Vorel
2023-04-04T11:08:06Z

Hi all,

FYI test fails on ppc64le: mmap() with MAP_SHARED_VALIDATE | (1 << 7) is
supposed to fail with EOPNOTSUPP, but on ppc64le it fails with EFAULT.

Obviously (1 << 7) being expected as invalid flag is not working well at least
on ppc64le. It might be something page size related or alignment. I was looking
into SYSCALL_DEFINE6(mmap, ...) implementations. Although ppc64le implementation
is not the same as most of implementations on other archs, in the end it also
calls ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> shift) as the other
archs. Any idea what could be a problem?