2017-11-17 23:24:52 +01:00
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apparmor: allow libvirtd to send signals to unconfined processes
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When confinement of QEMU/KVM domains is not enforced (security_default_confined = 0),
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qemu processes run unconfined. Add a rule to the libvirtd apparmor profile allowing
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sending signals to unconfined processes. Without the rule, libvirtd
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is unable to signal QEMU/KVM domains. E.g. 'virsh destroy dom' results in the
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following denial in audit.log
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type=AVC msg=audit(1510951646.581:939): apparmor="DENIED" operation="signal"
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profile="/usr/sbin/libvirtd" pid=18891 comm="libvirtd" requested_mask="send"
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denied_mask="send" signal=term peer="unconfined"
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2017-12-01 23:52:01 +01:00
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Index: libvirt-3.10.0/examples/apparmor/usr.sbin.libvirtd
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2017-11-17 23:24:52 +01:00
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===================================================================
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2017-12-01 23:52:01 +01:00
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--- libvirt-3.10.0.orig/examples/apparmor/usr.sbin.libvirtd
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+++ libvirt-3.10.0/examples/apparmor/usr.sbin.libvirtd
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2017-11-17 23:24:52 +01:00
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@@ -60,6 +60,9 @@
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signal (send) peer=/usr/sbin/dnsmasq,
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signal (read, send) peer=libvirt-*,
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+ # When confinement is not enforced (security_default_confined = 0), qemu
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+ # processes run unconfined, hence 'peer=unconfined'
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+ signal send set=(hup,kill,term) peer=unconfined,
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# Very lenient profile for libvirtd since we want to first focus on confining
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# the guests. Guests will have a very restricted profile.
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