[CRIU] problem with restore

Mon Aug 19 15:00:34 EDT 2013

Hello!
I'm trying to restore simple loop, like here criu.org/Simple_loop.
Dump is going well, but on restore i`m getting this error:
     pie: Error (pie/restorer.c:748): prctl failed @748 with -22
     (00.010455) Error (cr-restore.c:1372): Restoring FAILED.

What may cause this error?

"criu check" reports "Looks good."

kernel 3.11-rc6, all options from criu.org/Installation are turned on.