Re: [Qemu-devel] [PATCH RFC 8/9] tests: Add OpenBSD image

["Daniel P. Berrangé" <berrange@redhat.com>]

On Thu, Jan 24, 2019 at 05:10:19PM +0100, Philippe Mathieu-Daudé wrote:
> On 1/24/19 4:56 PM, Kamil Rytarowski wrote:
> > On 24.01.2019 16:52, Philippe Mathieu-Daudé wrote:
> >> On 8/16/17 9:21 AM, Fam Zheng wrote:
> >>> The image is prepared following instructions as in:
> >>>
> >>> https://wiki.qemu.org/Hosts/BSD
> >>>
> >>> Signed-off-by: Fam Zheng <famz@redhat.com>
> >>> ---
> >>>  tests/vm/openbsd | 45 +++++++++++++++++++++++++++++++++++++++++++++
> >>>  1 file changed, 45 insertions(+)
> >>>  create mode 100755 tests/vm/openbsd
> >>>
> >>> diff --git a/tests/vm/openbsd b/tests/vm/openbsd
> >>> new file mode 100755
> >>> index 0000000000..d37ff83a59
> >>> --- /dev/null
> >>> +++ b/tests/vm/openbsd
> >>> @@ -0,0 +1,45 @@
> >>> +#!/usr/bin/env python
> >>> +#
> >>> +# OpenBSD VM image
> >>> +#
> >>> +# Copyright (C) 2017 Red Hat Inc.
> >>> +#
> >>> +# Authors:
> >>> +#  Fam Zheng <famz@redhat.com>
> >>> +#
> >>> +# This work is licensed under the terms of the GNU GPL, version 2.  See
> >>> +# the COPYING file in the top-level directory.
> >>> +#
> >>> +
> >>> +import os
> >>> +import sys
> >>> +import logging
> >>> +import subprocess
> >>> +import tempfile
> >>> +import time
> >>> +import basevm
> >>> +
> >>> +class OpenBSDVM(basevm.BaseVM):
> >>> +    name = "openbsd"
> >>> +    BUILD_SCRIPT = """
> >>> +        set -e;
> >>> +        cd $(mktemp -d /var/tmp/qemu-test.XXXXXX);
> >>> +        tar -xf /dev/rsd1c;
> >>> +        ./configure --cc=x86_64-unknown-openbsd6.1-gcc-4.9.4 --python=python2.7 {configure_opts};
> >>> +        gmake -j{jobs};
> >>> +        # XXX: "gmake check" seems to always hang or fail
> >>> +        #gmake check;
> >>
> >> OK, Now it makes more sense...
> >>
> >> After spending various hours trying to fix various issues on OpenBSD, I
> >> notice that we never ran tests on this OS.
> >> The only binary I can run is qemu-img, the rest seems useless.
> >> I'll summarize in a different thread.
> >>
> > 
> > Is this W^X related?
> 
> Part of it could be but I'm not sure.
> 
> The 6.1 VM provided by Fam has /usr/local mounted with wxallowed, I
> tried building/running there and nothing changed, mmap() still returns
> ENOTSUP:

ENOTSUP from mmap is certainly what you'd expect from the W^X  scenario

  https://undeadly.org/cgi?action=article&sid=20160527203200

 "W^X violations are no longer permitted by default.  A kernel log message
  is generated, and mprotect/mmap return ENOTSUP.  If the sysctl(8) flag
  kern.wxabort is set then a SIGABRT occurs instead, for gdb use or coredump
  creation."


> Since the current script build into /var/tmp (which is symlinked to
> /tmp) I also mounted /tmp wxallowed using the following patch:
> 
> -- >8 --
> --- a/tests/vm/openbsd
> +++ b/tests/vm/openbsd
> @@ -39,6 +39,12 @@ class OpenBSDVM(basevm.BaseVM):
>          if os.path.exists(img):
>              os.rename(img_tmp, img)
> +        self.boot(img)
> +        self.wait_ssh()
> +        self.ssh_root_check("sed -E -i 's_(/tmp\ ffs)\ ([^\ ]*)_\\1
> \\2,wxallowed_' /etc/fstab")
> +        self.ssh_root_check("cat /etc/fstab")
> +        self.ssh_root("halt -p")
> +        self.wait()
> ---
> 
> $ mount
> /dev/sd0a on / type ffs (local)
> /dev/sd0k on /home type ffs (local, nodev, nosuid)
> /dev/sd0d on /tmp type ffs (local, nodev, nosuid, wxallowed)
> /dev/sd0f on /usr type ffs (local, nodev)
> /dev/sd0g on /usr/X11R6 type ffs (local, nodev)
> /dev/sd0h on /usr/local type ffs (local, nodev, wxallowed)
> /dev/sd0j on /usr/obj type ffs (local, nodev, nosuid)
> /dev/sd0i on /usr/src type ffs (local, nodev, nosuid)
> /dev/sd0e on /var type ffs (local, nodev, nosuid)
> 
> Still no progress.

Regards,
Daniel
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