Just to note: since one of the kernel upgrades, this issue is not
present anymore. I'm not sure which version fixed it.
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Title:
** Tags added: cscc
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Title:
Starting a KVM guest in a guest (nested VM) crash the kernel
Status in linux package in Ubuntu:
just adding some more info.
i also deploy openstack rocky on a ubuntu 18.04 host
Linux cloud-5 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
with ubuntu 18.04 l1 guest running
Linux numa-migration-1 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29
In the above, the middle one that crashes (so the 1st level of guests).
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Title:
Starting a KVM guest in a guest (nested VM) crash
It started right after I tried to run our OpenStack CI (so the nested
operation) on Bionic (with OpenStack Queens). Previously I used Xenial (with
kernel 4.4.0), that still works.
The host kernel is still from Xenial.
So:
Host with KVM->Guest with KVM->Nested Guest
Xenial (4.4) -> Bionic
Did this issue start happening after an update/upgrade? Was there a
kernel version where you were not having this particular problem? This
will help determine if the problem you are seeing is the result of a
regression, and when this regression was introduced. If this is a
regression, we can
The problem is there with 4.17-rc6
ompute2 login: [ 5290.132368] general protection fault: [#1] SMP PTI
[ 5290.133501] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ebt_arp
ebt_among ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 xt_CT xt_mac xt_comment
xt_physdev vhost_net vhost tap
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.17 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
apport information
** Tags added: apport-collected ec2-images
** Description changed:
linux-image-4.15.0.22 (20, and probably earlier, too) panics when
starting a guest VM in a nested manner.
compute1 login: [ 4847.733004] general protection fault: [#1] SMP PTI
[ 4847.736595]
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