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Add that /var/run or subpaths cannot be exposed when symlinked on host #544

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Merged
bbhtt merged 2 commits into from
Nov 14, 2024
Merged

Add that /var/run or subpaths cannot be exposed when symlinked on host #544

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5e7f0d8
Add that `/var/run` or subpaths cannot be exposed when symlinked on host
bbhtt Oct 28, 2024
a504a5e
debugging: Update link to perf wiki
bbhtt Oct 28, 2024
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2 changes: 1 addition & 1 deletion docs/debugging.rst
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Expand Up @@ -110,7 +110,7 @@ is doing. For example, to trace ``openat(), read()`` calls::

$ strace -e trace=openat,read -o strace.log -f /app/bin/<application-binary>

`Perf <https://perf.wiki.kernel.org/index.php/Main_Page>`_ requires
`Perf <https://perfwiki.github.io/main/>`_ requires
access to ``--filesystem=/sys`` to run::

$ flatpak run --command=perf --filesystem=/sys --filesystem=$(pwd) --devel $FLATPAK_ID record -v -- <command>
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3 changes: 2 additions & 1 deletion docs/sandbox-permissions.rst
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Expand Up @@ -222,7 +222,8 @@ to them with ``--filesystem`` will have no effect::

The entire ``/run`` is not allowed and all subpaths of ``/run`` except
``/run/flatpak, /run/host`` is allowed to be exposed via
``--filesystem``.
``--filesystem``. Additionally, if ``/var/run`` on host is a symlink to
``../run``, exposing it or a subpath of it, is not allowed.

Additionally the following directories from host need to be explicitly
requested with ``--filesystem`` and are not available with
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