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From 0ef48896d9f23b9fd547a532a4e6e6b8f8b12901 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Wed, 23 Nov 2022 16:09:56 +0100
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Subject: [PATCH 2/2] pam: add a call to pam_namespace
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A call to pam_namespace is required so that children of user@.service end up in
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a namespace as expected. pam_namespace gets called as part of the stack that
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creates a session (login, sshd, gdm, etc.) and those processes end up in a
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namespace, but it also needs to be called from our stack which is parallel and
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descends from pid1 itself.
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The call to pam_namespace is similar to the call to pam_keyinit that was added
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in ab79099d1684457d040ee7c28b2012e8c1ea9a4f. The pam stack for user@.service
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creates a new session which is disconnected from the parent environment. Both
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calls are not suitable for inclusion in the shared part of the stack (e.g.
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@system-auth on Fedora/RHEL systems), because for example su/sudo/runuser
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should not include them.
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Fixes #17043 (Allow to execute user service into dedicated namespace
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if pam_namespace enabled)
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Related to https://bugzilla.redhat.com/show_bug.cgi?id=1861836
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(Polyinstantiation is ignored/bypassed in GNOME sessions)
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---
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src/login/systemd-user.in | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/login/systemd-user.in b/src/login/systemd-user.in
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index d5597d28cb..06f7e36458 100644
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--- a/src/login/systemd-user.in
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+++ b/src/login/systemd-user.in
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@@ -15,6 +15,7 @@ session required pam_selinux.so nottys open
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{% endif %}
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session required pam_loginuid.so
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session optional pam_keyinit.so force revoke
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+session required pam_namespace.so
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{% if ENABLE_HOMED %}
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-session optional pam_systemd_home.so
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{% endif %}
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--
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2.38.1
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