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CRIU dump/check fails for a process with "kerndat_has_ipv6_freebind failed when initializing kerndat" #2222

Closed yevzman-swe closed 1 year ago

yevzman-swe commented 1 year ago

Description Hi, Today while using CRIU (v3.18) I got an error: "Unable to create a ipv6 dgram socket: Address family not supported by protocol", when dumping the process and also when trying to do 

criu check

Steps to reproduce the issue:

  1. A machine with disabled IPv6. Artificially can be reproduced by editing value of variables in /etc/default/grub file: 
    GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"
# (If there were any other parameters here, such as "quiet splash," simply separate that parameter from the new one with a space (e.g., GRUB_CMDLINE_LINUX_DEFAULT="quiet spash ipv6.disable=1"))
GRUB_CMDLINE_LINUX="ipv6.disable=1"

    and furthere system rebooting:

    sudo reboot
  2. Run command: 
    criu check

    or dump process

    criu dump -t $PID

Describe the results you received: for both criu check and criu dump i got

Error (criu/kerndat.c:1581): Unable to create a ipv6 dgram socket: Address family not supported by protocol
Error (criu/kerndat.c:1839): kerndat_has_ipv6_freebind failed when initializing kerndat.
Error (criu/crtools.c:263): Could not initialize kernel features detection.

Describe the results you expected: for criu check

Looks good.

for criu dump: Successful dump

CRIU logs and information:

Output of `criu --version`:

``` Version: 3.18 GitID: v3.18-57-g504d05197 ```

Output of `criu check --all`:

``` Error (criu/kerndat.c:1581): Unable to create a ipv6 dgram socket: Address family not supported by protocol Error (criu/kerndat.c:1839): kerndat_has_ipv6_freebind failed when initializing kerndat. Error (criu/crtools.c:263): Could not initialize kernel features detection. ```

Additional environment details: result of command uname -a

Linux 5.19.0-46-generic #47~22.04.1-Ubuntu SMP Wed Jun 21 15:35:31 UTC 2 x86_64 x86_64 x86_64 GNU/Linux