I'm using qemu-bridge-helper already for a while. Since updating to
19.10 libvirtd suddenly refused to start my VMs. Turned out to be caused
by apparmor, I found these log messages:
audit: type=1400 audit(1580253669.262:100): apparmor="DENIED"
operation="file_inherit" profile="libvirtd//qemu_bridge_helper" pid=5629
comm="qemu-bridge-hel" family="unix" sock_type="stream" protocol=0
requested_mask="send receive" denied_mask="send receive" addr=none
peer_addr=none peer="libvirtd"
audit: type=1400 audit(1580253669.262:101): apparmor="DENIED"
operation="file_inherit" profile="libvirtd" pid=5629 comm="qemu-bridge-hel"
family="unix" sock_type="stream" protocol=0 requested_mask="send receive"
denied_mask="send receive" addr=none peer_addr=none
peer="libvirtd//qemu_bridge_helper"
audit: type=1400 audit(1580253669.262:102): apparmor="DENIED"
operation="signal" profile="libvirtd" pid=3118 comm="libvirtd"
requested_mask="send" denied_mask="send" signal=term
peer="libvirtd//qemu_bridge_helper"
For me the following change below the issue. I've barely any idea what I'm
doing, never wrote apparmor profiles before. So probably this patch needs a bit
of fine-tuning.
--- usr.sbin.libvirtd-orig 2020-01-29 22:52:27.257908332 +0100
+++ usr.sbin.libvirtd 2020-01-29 22:45:42.358642382 +0100
@@ -62,8 +62,10 @@
signal (send) set=("kill", "term") peer=unconfined,
# For communication/control to qemu-bridge-helper
- unix (send, receive) type=stream addr=none
peer=(label=/usr/sbin/libvirtd//qemu_bridge_helper),
- signal (send) set=("term") peer=/usr/sbin/libvirtd//qemu_bridge_helper,
+ unix (send, receive) type=stream addr=none
peer=(label=libvirtd//qemu_bridge_helper),
+ signal (send) set=("term") peer=libvirtd//qemu_bridge_helper,
# allow connect with openGraphicsFD, direction reversed in newer versions
unix (send, receive) type=stream addr=none
peer=(label=libvirt-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*-[0-9a-f]*),
@@ -122,7 +124,8 @@
network inet stream,
# For communication/control from libvirtd
- unix (send, receive) type=stream addr=none peer=(label=/usr/sbin/libvirtd),
+ unix (send, receive) type=stream addr=none peer=(label=libvirtd),
signal (receive) set=("term") peer=/usr/sbin/libvirtd,
signal (receive) set=("term") peer=libvirtd,
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https://bugs.launchpad.net/bugs/1655111
Title:
LibVirt Apparmor profile has qemu-bridge-helper listed in the wrong
directory
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