Description of problem:

The following command gives an error:

docker run --cap-add=SYS_ADMIN --name 7-f23-d41d8cd98f00b204e9800998ecf8427e -v /tmp/tmplCbW9M:/tmp/tmplCbW9M -w /tmp/tmplCbW9M 8dad1bfbf15d /usr/bin/mock -r fedora-rawhide-x86_64 --uniqueext 7-f23 --scm-enable --scm-option method=git --scm-option package=example --scm-option branch= --scm-option write_tar=True --scm-option spec=subpkg/example.spec --scm-option git_get=git clone --depth 1 https://github.com/clime/example2.git example --buildsrpm --resultdir=/tmp/tmplCbW9M

The error is:

mock.py version 1.3.3 starting (python version = 3.5.1)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/tmp/tmprx9ydejp.mock-scm.example/example/subpkg/example.spec)  Config(fedora-rawhide-x86_64)
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled root cache
INFO: enabled dnf cache
Start: cleaning dnf metadata
Finish: cleaning dnf metadata
Mock Version: 1.3.3
INFO: Mock Version: 1.3.3
ERROR: Exception(/tmp/tmprx9ydejp.mock-scm.example/example/subpkg/example.spec) Config(fedora-rawhide-x86_64) 0 minutes 0 seconds
INFO: Results and/or logs in: /tmp/tmplCbW9M
INFO: Cleaning up build root ('cleanup_on_failure=True')
Start: clean chroot
Finish: clean chroot
ERROR: Command failed. See logs for output.
 # /bin/mount -n -t proc proc /var/lib/mock/fedora-rawhide-x86_64-7-f23/root/proc

With selinux disabled, the error no longer occurs.

Version-Release number of selected component (if applicable):
Name        : docker
Arch        : x86_64
Epoch       : 2
Version     : 1.12.6
Release     : 5.git037a2f5.fc25

Name        : mock
Arch        : noarch
Epoch       : 0
Version     : 1.3.3
Release     : 1.fc25

How reproducible:
Always


Actual results:
The command fails to build srpm.

Expected results:
The command builds srpm.

Additional info:
The command is run from a service on a machine providing dist-git repos. That machine has currently selinux disabled so this is not a critical issue. When trying to reproduce the issue in shell I encountered another error that also disappeared after disabling SELinux:

Traceback (most recent call last):
  File "/usr/libexec/mock/mock", line 885, in <module>
    main()
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/libexec/mock/mock", line 701, in main
    run_command(options, args, config_opts, commands, buildroot, state)
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/libexec/mock/mock", line 786, in run_command
    do_buildsrpm(config_opts, commands, buildroot, options, args)
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/libexec/mock/mock", line 538, in do_buildsrpm
    cmd=cmd, post=None, clean=clean)
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/libexec/mock/mock", line 464, in rebuild_generic
    commands.init(prebuild=not config_opts.get('short_circuit'))
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.5/site-packages/mockbuild/backend.py", line 124, in init
    self.buildroot.initialize(**kwargs)
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.5/site-packages/mockbuild/buildroot.py", line 90, in initialize
    self._init(prebuild=prebuild, do_log=do_log)
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.5/site-packages/mockbuild/buildroot.py", line 128, in _init
    self._resetLogging()
  File "/usr/lib/python3.5/site-packages/mockbuild/trace_decorator.py", line 89, in trace
    result = func(*args, **kw)
  File "/usr/lib/python3.5/site-packages/mockbuild/buildroot.py", line 312, in _resetLogging
    fh = logging.FileHandler(fullPath, "a+")
  File "/usr/lib64/python3.5/logging/__init__.py", line 1008, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/lib64/python3.5/logging/__init__.py", line 1037, in _open
    return open(self.baseFilename, self.mode, encoding=self.encoding)
PermissionError: [Errno 13] Permission denied: '/tmp/tmpXYj2jX/state.log'