]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
selftest/vm: verify mmap addr in mremap_test
authorSidhartha Kumar <sidhartha.kumar@oracle.com>
Thu, 21 Apr 2022 23:35:49 +0000 (16:35 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 22 Apr 2022 03:01:09 +0000 (20:01 -0700)
commit9c85a9bae267f6b5e5e374d0d023bbbe9db096d3
tree793bc512a78e15fcec3dcf884bf386d876db336b
parent5f24d5a579d1eace79d505b148808a850b417d4c
selftest/vm: verify mmap addr in mremap_test

Avoid calling mmap with requested addresses that are less than the
system's mmap_min_addr.  When run as root, mmap returns EACCES when
trying to map addresses < mmap_min_addr.  This is not one of the error
codes for the condition to retry the mmap in the test.

Rather than arbitrarily retrying on EACCES, don't attempt an mmap until
addr > vm.mmap_min_addr.

Add a munmap call after an alignment check as the mappings are retained
after the retry and can reach the vm.max_map_count sysctl.

Link: https://lkml.kernel.org/r/20220420215721.4868-1-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
tools/testing/selftests/vm/mremap_test.c