cosa build error: "cli: stat /var/tmp/mantle-qemu771203327/swtpm-sock: no such file or directory" about coreos-assembler HOT 4 CLOSED

I have seen different behaviors regarding this /var/tmp/mantle-qemuXXXX/swtpm-sock. Very strange.
I have three hosts.
Host 1) The error is as above.
Host 2) No error.
Host 3) No error at first, then I recreated /var/tmp to be a symlink to /data/var/tmp. The similar error appeared.

All hosts are Ubuntu 22. And /var/tmp & /data/var/tmp have permission 1777.

How I could further check this issue?

from coreos-assembler.

Even if I remove the '-v=/var/tmp:/var/tmp', I still get the same error. So the problem seems irrelevant with the host /var/tmp.

• podman run --rm -ti --security-opt=label=disable --privileged --uidmap=1000:0:1 --uidmap=0:1:1000 --uidmap=1001:1001:64536 -v=/home/chenqi/projects/Fedora-Co
  reOS/fcos:/srv/ --device=/dev/kvm --device=/dev/fuse --tmpfs=/tmp --name=cosa quay.io/coreos-assembler/coreos-assembler:latest build

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OK. I think I found the root cause.
The problem is about the usr.bin.swtpm apparmor profile.

Solution:
sudo ln -s /etc/apparmor.d/usr.bin.swtpm /etc/apparmor.d/disable/
sudo apparmor_parser -R /etc/apparmor.d/disable/usr.bin.swtpm

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In case other people are seeing the same issue, please see above comments.

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