Fix null point reference panic
Fix null point reference panic

Signed-off-by: Qiang Huang <488e06933c295c76472a67dbc6657ac40a756953@huawei.com>

estesp/runc,kolyshkin/runc,kolyshkin/runc,mikebrow/runc,WeiZhang555/runc,adrianreber/runc,shishir-a412ed/runc,opencontainers/runc,xiaochenshen/runc,rajasec/runc,cloudfoundry-incubator/runc,hqhq/runc,mYmNeo/runc,sunyuan3/runc,adrianreber/runc,vbatts/runc,estesp/runc,crosbymichael/runc,justincormack/runc,stefanberger/runc,shishir-a412ed/runc,rhatdan/runc,mheon/runc,avagin/runc,nkwilson/runc,maxamillion/runc,laijs/runc,coolljt0725/runc,rhatdan/runc,nkwilson/runc,adrianreber/runc,jhowardmsft/runc,sunyuan3/runc,crosbymichael/runc,avagin/runc,justincormack/runc,dqminh/runc,shishir-a412ed/runc,jhowardmsft/runc,rhatdan/runc,cloudfoundry-incubator/runc,vbatts/runc,cyphar/runc,wking/runc,justincormack/runc,docker/runc,jhowardmsft/runc,mYmNeo/runc,estesp/runc,hqhq/runc,coolljt0725/runc,xiaochenshen/runc,stefanberger/runc,vbatts/runc,hqhq/runc,kolyshkin/runc,opencontainers/runc,sunyuan3/runc,mYmNeo/runc,wking/runc,coolljt0725/runc,dqminh/runc,WeiZhang555/runc,kolyshkin/runc,opencontainers/runc,opencontainers/runc,docker/runc,rajasec/runc,laijs/runc,dqminh/runc,avagin/runc,dqminh/runc,rhatdan/runc,maxamillion/runc,WeiZhang555/runc,rajasec/runc,nkwilson/runc,mikebrow/runc,laijs/runc,mheon/runc,cyphar/runc,xiaochenshen/runc,crosbymichael/runc,cyphar/runc,cloudfoundry-incubator/runc,stefanberger/runc,mheon/runc,maxamillion/runc,mikebrow/runc,wking/runc,docker/runc