apparmor_linux_template.go

//go:build linux && apparmor

package apparmor

const defaultProfileTemplate = `
{{range $value := .Imports}}
{{$value}}
{{end}}

profile {{.Name}} flags=(attach_disconnected,mediate_deleted) {
{{range $value := .InnerImports}}
  {{$value}}
{{end}}

  network,
  capability,
  file,
  umount,

{{if ge .Version 208096}}
  # Allow signals from privileged profiles and from within the same profile
  signal (receive) peer=unconfined,
  signal (send,receive) peer={{.Name}},
  # Allow certain signals from OCI runtimes (podman, runc and crun)
  signal (receive) peer={/usr/bin/,/usr/sbin/,}runc,
  signal (receive) peer={/usr/bin/,/usr/sbin/,}crun*,
  signal (receive) set=(int, quit, kill, term) peer={/usr/bin/,/usr/sbin/,}podman,
{{end}}

  deny @{PROC}/* w,   # deny write for all files directly in /proc (not in a subdir)
  # deny write to files not in /proc/<number>/** or /proc/sys/**
  deny @{PROC}/{[^1-9],[^1-9][^0-9],[^1-9s][^0-9y][^0-9s],[^1-9][^0-9][^0-9][^0-9]*}/** w,
  deny @{PROC}/sys/[^k]** w,  # deny /proc/sys except /proc/sys/k* (effectively /proc/sys/kernel)
  deny @{PROC}/sys/kernel/{?,??,[^s][^h][^m]**} w,  # deny everything except shm* in /proc/sys/kernel/
  deny @{PROC}/sysrq-trigger rwklx,
  deny @{PROC}/kcore rwklx,

  deny mount,

  deny /sys/[^f]*/** wklx,
  deny /sys/f[^s]*/** wklx,
  deny /sys/fs/[^c]*/** wklx,
  deny /sys/fs/c[^g]*/** wklx,
  deny /sys/fs/cg[^r]*/** wklx,
  deny /sys/firmware/** rwklx,
  deny /sys/kernel/security/** rwklx,

{{if ge .Version 208095}}
  # suppress ptrace denials when using 'ps' inside a container
  ptrace (trace,read) peer={{.Name}},
{{end}}
}
`