Hi list,

just tried to get ntp time daemon (ntpd) working in one of the latest centos-7 
lx-images.

Could not get it working with the default configuration ("ntpd -u ntp:ntp"). I 
am getting the following error:
> cap_set_proc() failed to drop root privileges: Operation not permitted

Did an strace and found following errors:
> adjtimex(0x7fffff2ae920)                = -1 EPERM (Operation not permitted)
> connect(5, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) 
> = -1 EINVAL (Invalid argument)
> connect(5, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) 
> = -1 EINVAL (Invalid argument)
> connect(5, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) 
> = -1 EINVAL (Invalid argument)
> adjtimex(0x7fffff2ae920)                = -1 EPERM (Operation not permitted)
> capset({_LINUX_CAPABILITY_VERSION_3, 0}, {CAP_NET_BIND_SERVICE|CAP_SYS_TIME, 
> CAP_NET_BIND_SERVICE|CAP_SYS_TIME, CAP_NET_BIND_SERVICE|CAP_SYS_TIME}) = -1 
> EPERM (Operation not permitted)

It's working well when i start it under the root user.

Could supply whole strace output if needed.

My version information:
> [root@xxx ~]# uname -a
> Linux xxx.xxx.xx 3.10.0 BrandZ virtual linux x86_64 x86_64 x86_64 GNU/Linux

Image:
> d1c80032-83d2-11e5-b89f-c317cd0ed1fd



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