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tests: Try harder to evade --disable-userns

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The worst-case scenario in terms of enforcing --disable-userns is that
we're retaining all capabilities, so test that too, to make sure that
the option is genuinely restricting even a privileged user.

Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Simon McVittie
2023-02-23 10:02:01 +00:00
parent 140936fd73
commit 2ba9a9af91
1 changed files with 9 additions and 0 deletions
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9
tests/test-run.sh
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@@ -132,6 +132,15 @@ else
$BWRAP --unshare-user --disable-userns --dev-bind / / -- sh -c "echo 2 > /proc/sys/user/max_user_namespaces || true; ! $BWRAP --unshare-user --dev-bind / / -- true"
$BWRAP --unshare-user --disable-userns --dev-bind / / -- sh -c "echo 100 > /proc/sys/user/max_user_namespaces || true; ! $BWRAP --unshare-user --dev-bind / / -- true"
$BWRAP --unshare-user --disable-userns --dev-bind / / -- sh -c "! $BWRAP --unshare-user --dev-bind / / --assert-userns-disabled -- true"
$BWRAP_RECURSE --dev-bind / / -- true
! $BWRAP_RECURSE --assert-userns-disabled --dev-bind / / -- true
$BWRAP_RECURSE --unshare-user --disable-userns --dev-bind / / -- true
! $BWRAP_RECURSE --unshare-user --disable-userns --dev-bind / / -- /proc/self/exe --dev-bind / / -- true
$BWRAP_RECURSE --unshare-user --disable-userns --dev-bind / / -- sh -c "echo 2 > /proc/sys/user/max_user_namespaces || true; ! $BWRAP --unshare-user --dev-bind / / -- true"
$BWRAP_RECURSE --unshare-user --disable-userns --dev-bind / / -- sh -c "echo 100 > /proc/sys/user/max_user_namespaces || true; ! $BWRAP --unshare-user --dev-bind / / -- true"
$BWRAP_RECURSE --unshare-user --disable-userns --dev-bind / / -- sh -c "! $BWRAP --unshare-user --dev-bind / / --assert-userns-disabled -- true"
echo "ok - can disable nested userns"
fi