merge branch 'pr-2141'
merge branch 'pr-2141'

Radostin Stoyanov (1):
  criu: Ensure other users cannot read c/r files

LGTMs: 2665d0b6daa6ccd1337288f8885cbc52b5d5ee7e@cyphar
Closes #2141

xiaochenshen/runc,kolyshkin/runc,mYmNeo/runc,rhatdan/runc,estesp/runc,mikebrow/runc,opencontainers/runc,estesp/runc,xiaochenshen/runc,mikebrow/runc,dqminh/runc,kolyshkin/runc,rhatdan/runc,mikebrow/runc,dqminh/runc,xiaochenshen/runc,opencontainers/runc,dqminh/runc,rhatdan/runc,mYmNeo/runc,kolyshkin/runc,kolyshkin/runc,opencontainers/runc,opencontainers/runc,mYmNeo/runc,dqminh/runc,estesp/runc,rhatdan/runc