Failed to dump the process that was restored from the checkpoint

[liuaifu]

Description

Failed to dump the process that was restored from the checkpoint.

Steps to reproduce the issue:

1. sudo ~/criu/scripts/criu-ns dump -t [pid] -D ~/test -j
2. sudo ~/criu/scripts/criu-ns restore -D ~/test -j
3. sudo ~/criu/scripts/criu-ns dump -t [newpid] -D ~/test2 -j

Describe the results you received:
eplace pid 5191 with 3069
['/home/dev/criu/scripts/criu-ns', 'dump', '-t', '3069', '-D', '/home/dev/test2', '-j']
Warn (compel/arch/x86/src/lib/infect.c:281): Will restore 3069 with interrupted system call
Error (criu/files-reg.c:1371): Can't lookup mount=26 for fd=0 path=/dev/pts/0
Error (criu/cr-dump.c:1348): Dump files (pid: 3069) failed with -1
Error (criu/cr-dump.c:1764): Dumping FAILED.

Describe the results you expected:
ok.

Additional information you deem important (e.g. issue happens only occasionally):

CRIU logs and information:

CRIU full dump/restore logs:

(paste your output here)

Output of `criu --version`:

Version: 3.14

Output of `criu check --all`:

Looks good.

Additional environment details:

dev@dev-VirtualBox:~$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.10
DISTRIB_CODENAME=groovy
DISTRIB_DESCRIPTION="Ubuntu 20.10"
dev@dev-VirtualBox:~$ uname -r
5.8.0-63-generic

[adrianreber]

Any specific reason you are using criu-ns? Did you try it without criu-ns?

[liuaifu]

@adrianreber The main purpose of using criu-ns is to clone processes, where a specified process is cloned into multiple processes. criu cannot achieve this task.

Is the version of criu I'm using too old? Does the new version fix this?

[adrianreber]

Ah, okay, makes sense.

[Snorch]

Version: 3.14
Is the version of criu I'm using too old? Does the new version fix this?

Yes, I believe new version can fix your problem, as we had problems with criu-ns recently.

For reference, see:
#1909
#232
#1893

[liuaifu]

I tested v3.18-201-ga9cbdad76 on Ubuntu 22.04.3 LTS and this issue has been fixed, thanks.

[Snorch]

Thanks for confirming!