diff --git a/components/cli/opts/opts.go b/components/cli/opts/opts.go index a56c0cc42e..0b09981778 100644 --- a/components/cli/opts/opts.go +++ b/components/cli/opts/opts.go @@ -240,3 +240,35 @@ func ValidateLabel(val string) (string, error) { } return val, nil } + +// ValidateSysctl validates an sysctl and returns it. +func ValidateSysctl(val string) (string, error) { + validSysctlMap := map[string]bool{ + "kernel.msgmax": true, + "kernel.msgmnb": true, + "kernel.msgmni": true, + "kernel.sem": true, + "kernel.shmall": true, + "kernel.shmmax": true, + "kernel.shmmni": true, + "kernel.shm_rmid_forced": true, + } + validSysctlPrefixes := []string{ + "net.", + "fs.mqueue.", + } + arr := strings.Split(val, "=") + if len(arr) < 2 { + return "", fmt.Errorf("sysctl '%s' is not whitelisted", val) + } + if validSysctlMap[arr[0]] { + return val, nil + } + + for _, vp := range validSysctlPrefixes { + if strings.HasPrefix(arr[0], vp) { + return val, nil + } + } + return "", fmt.Errorf("sysctl '%s' is not whitelisted", val) +}