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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:07 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:17 +0200
commit9260319e7411ff8281700a532caa436f40120ec4 (patch)
tree2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues_text/target_i386/host_missing/accel_missing/975
parent225caa38269323af1bfc2daadff5ec8bd930747f (diff)
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+LXD with QEMU 6.2.0 (and 7.0.0-rc3) breaks during stateful migration
+Description of problem:
+
+Steps to reproduce:
+```
+sudo snap install --lxd
+sudo lxd init --auto
+lxc init images:ubuntu/20.04/cloud v1 --vm
+Creating v1
+lxc config device override v1 root size.state=2GiB
+Device root overridden for v1
+lxc config set v1 migration.stateful=true
+lxc start v1
+sleep 10
+lxc exec v1 -- uptime
+ 22:05:54 up 0 min,  0 users,  load average: 0.07, 0.02, 0.00
+lxc snapshot v1 --stateful
+Error: Migration call failed
+lxc snapshot v1 --stateful
+Error: Monitor is disconnected
+```
+
+The first attempt at `lxc snapshot v1 --stateful` caused this in the `lxc info v1 --show-log` log output:
+
+```
+qemu-system-x86_64: qemu_savevm_state_complete_precopy_non_iterable: bdrv_inactivate_all() failed (-1)
+```
+
+The second attempt caused this:
+
+```
+qemu-system-x86_64: ../block.c:6757: bdrv_inactivate_recurse: Assertion `!(bs->open_flags & BDRV_O_INACTIVE)' failed.
+```
+
+Which crashed QEMU completely and caused the VM to die.
+Nothing relevant showed up in dmesg, so this wasn't caused by an obvious seccomp or apparmor policy issue.
+Additional information:
+Originally reported by Stephane Graber at https://github.com/lxc/lxd/issues/9875