Public bug reported:
Today I upgraded from 22.04 to 24.04
10.0.0-2ubuntu8.2
I have a VM with 16GB of hugepages allocated to it.
This no longer works.
I can not defeat the virtual machine start up error (from virtual
manager):
Error starting domain: internal error: QEMU unexpectedly closed the
monitor (vm='ubuntu24.04'): 2024-07-16T04:54:51.443751Z qemu-
system-x86_64: failed to resize memfd to 17179869184: Permission denied
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in cb_wrapper
callback(asyncjob, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 108, in tmpcb
callback(*args, **kwargs)
File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 57,
in newfn
ret = fn(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/share/virt-manager/virtManager/object/domain.py", line 1402, in
startup
self._backend.create()
File "/usr/lib/python3/dist-packages/libvirt.py", line 1379, in create
raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: internal error: QEMU unexpectedly closed the monitor
(vm='ubuntu24.04'): 2024-07-16T04:54:51.443751Z qemu-system-x86_64: failed to
resize memfd to 17179869184: Permission denied
I have done this:
sudo aa-complain /etc/apparmor.d/usr.lib.libvirt.virt-aa-helper
sudo aa-complain /etc/apparmor.d/usr.sbin.libvirtd
While I did not have to take any such steps with 22.04, I have mounted
sudo mount -t hugetlbfs -o mode=1770,gid=kvm none /dev/hugepages
and these permissions are observed:
root@black:/etc/apparmor.d# ls -ld /dev/hugepages
drwxrwx--t 3 root kvm 0 Jul 16 14:47 /dev/hugepages
root@black:/etc/apparmor.d# id libvirt-qemu
uid=64055(libvirt-qemu) gid=109(kvm)
groups=109(kvm),139(libvirt),64055(libvirt-qemu),1002(hugetlb)
I have edited /etc/libvirt/qemu.conf to uncomment the mount point of the
hugepages, even though this was not necessary with 22.04
log entries don't add anything (for me):
2024-07-16T04:54:51.443751Z qemu-system-x86_64: failed to resize memfd to
17179869184: Permission denied
2024-07-16 04:54:51.477+0000: shutting down, reason=failed
kernel stuff:
# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-6.8.0-38-generic
root=UUID=756dca1f-0eb5-440e-a84e-dfa56a27e355 ro quiet splash zswap.enabled=1
zswap.compressor=lz4 zswap.zpool=z3fold mitigations=off vt.handoff=7
** Affects: libvirt (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- hugespages causes permissions error
+ hugepages causes permissions error
** Description changed:
Today I upgraded from 22.04 to 24.04
I have a VM with 16GB of hugepages allocated to it.
This no longer works.
I can not defeat the virtual machine start up error (from virtual
manager):
Error starting domain: internal error: QEMU unexpectedly closed the
monitor (vm='ubuntu24.04'): 2024-07-16T04:54:51.443751Z qemu-
system-x86_64: failed to resize memfd to 17179869184: Permission denied
Traceback (most recent call last):
- File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in
cb_wrapper
- callback(asyncjob, *args, **kwargs)
- File "/usr/share/virt-manager/virtManager/asyncjob.py", line 108, in tmpcb
- callback(*args, **kwargs)
- File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line
57, in newfn
- ret = fn(self, *args, **kwargs)
- ^^^^^^^^^^^^^^^^^^^^^^^^^
- File "/usr/share/virt-manager/virtManager/object/domain.py", line 1402, in
startup
- self._backend.create()
- File "/usr/lib/python3/dist-packages/libvirt.py", line 1379, in create
- raise libvirtError('virDomainCreate() failed')
+ File "/usr/share/virt-manager/virtManager/asyncjob.py", line 72, in
cb_wrapper
+ callback(asyncjob, *args, **kwargs)
+ File "/usr/share/virt-manager/virtManager/asyncjob.py", line 108, in tmpcb
+ callback(*args, **kwargs)
+ File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line
57, in newfn
+ ret = fn(self, *args, **kwargs)
+ ^^^^^^^^^^^^^^^^^^^^^^^^^
+ File "/usr/share/virt-manager/virtManager/object/domain.py", line 1402, in
startup
+ self._backend.create()
+ File "/usr/lib/python3/dist-packages/libvirt.py", line 1379, in create
+ raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: internal error: QEMU unexpectedly closed the monitor
(vm='ubuntu24.04'): 2024-07-16T04:54:51.443751Z qemu-system-x86_64: failed to
resize memfd to 17179869184: Permission denied
-
I have done this:
sudo aa-complain /etc/apparmor.d/usr.lib.libvirt.virt-aa-helper
sudo aa-complain /etc/apparmor.d/usr.sbin.libvirtd
-
- While I did not have to take any such steps with 22.04, I have mounted
-
+ While I did not have to take any such steps with 22.04, I have mounted
sudo mount -t hugetlbfs -o mode=1770,gid=kvm none /dev/hugepages
and these permissions are observed:
root@black:/etc/apparmor.d# ls -ld /dev/hugepages
drwxrwx--t 3 root kvm 0 Jul 16 14:47 /dev/hugepages
-
root@black:/etc/apparmor.d# id libvirt-qemu
uid=64055(libvirt-qemu) gid=109(kvm)
groups=109(kvm),139(libvirt),64055(libvirt-qemu),1002(hugetlb)
I have edited /etc/libvirt/qemu.conf to uncomment the mount point of the
hugepages, even though this was not necessary with 22.04
-
log entries don't add anything (for me):
2024-07-16T04:54:51.443751Z qemu-system-x86_64: failed to resize memfd to
17179869184: Permission denied
2024-07-16 04:54:51.477+0000: shutting down, reason=failed
+
+
+ kernel stuff:
+
+ # cat /proc/cmdline
+ BOOT_IMAGE=/vmlinuz-6.8.0-38-generic
root=UUID=756dca1f-0eb5-440e-a84e-dfa56a27e355 ro quiet splash zswap.enabled=1
zswap.compressor=lz4 zswap.zpool=z3fold mitigations=off vt.handoff=7
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https://bugs.launchpad.net/bugs/2073214
Title:
hugepages causes permissions error
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