crowdsecurity/crowdsec · error
out of bound gid
Error message
out of bound gid
What it means
getGID parses the group ID string from a syscall.Stat_t / user lookup into an int32 and validates it fits in a uint32-compatible range before returning it. It throws 'out of bound gid' when the parsed gid is negative or exceeds math.MaxInt32, guarding against invalid or corrupted group identifiers.
Solutions
- Check the gid configured for the crowdsec user/group in the config (api.server or plugin section) and set a valid numeric group ID between 0 and 2147483647
- Verify with 'id <user>' that the group's gid is a sane positive value
- Fix the /etc/group entry if the gid is corrupt or negative
Example fix
// before
gid, err := strconv.ParseInt(g.Gid, 10, 32)
// after
if gid, err := strconv.ParseInt(g.Gid, 10, 32); err == nil && gid >= 0 && gid <= math.MaxInt32 {
// proceed
} Defensive patterns
Strategy: validation
Validate before calling
if v, err := strconv.ParseInt(gidStr, 10, 32); err != nil || v < 0 || v > math.MaxInt32 { return fmt.Errorf("invalid gid %q", gidStr) } Type guard
func gidInRange(v int64) bool { return v >= 0 && v <= math.MaxInt32 } Try / catch
gid, err := getGID(g)
if err != nil { return fmt.Errorf("while getting gid for plugin user: %w", err) } Prevention
- Verify the configured group's numeric gid with 'id -g <user>'
- Keep /etc/group entries within the signed int32 range
- Validate user/group config at startup before spawning plugin processes
When it happens
Trigger: Called from getProcessAttr when starting a plugin subprocess: the configured group (via config user/group or the process's own gid from os.Getgroups/stat) parses to a value < 0 or > 2147483647.
Common situations: A corrupted or hand-edited config specifying a gid string like '-1' or a huge number; unusual numeric gids from exotic user databases; a stat reporting an overflowed gid on a weird filesystem.
Understand the failure class
Background: "value must be between 0 and 1" / "out of range" / "must not be negative" errors: fixing range-validation failures across open-source libraries — this error's family across 42 libraries.
Related errors
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- empty rdns pattern for bot entry
- ErrFeatureNameInvalid
- feature flag
- invalid CIDR range ' ' for bot entry ' ' in
AI-assisted analysis of crowdsecurity/crowdsec@909b515798 (2026-09-06).
Data as JSON: /api/errors/ec1d2d5a4857e96d.
Report an issue: GitHub.
Appendix: source
Thrown at pkg/csplugin/utils.go:63
return 0, err
}
if uid < 0 || uid > math.MaxInt32 {
return 0, errors.New("out of bound uid")
}
return uint32(uid), nil
}
func getGID(groupname string) (uint32, error) {
g, err := user.LookupGroup(groupname)
if err != nil {
return 0, err
}
gid, err := strconv.ParseInt(g.Gid, 10, 32)
if err != nil {
return 0, err
}
if gid < 0 || gid > math.MaxInt32 {
return 0, errors.New("out of bound gid")
}
return uint32(gid), nil
}
func getPluginTypeAndSubtypeFromPath(path string) (string, string, error) {
pluginFileName := filepath.Base(path)
parts := strings.Split(pluginFileName, "-")
if len(parts) < 2 {
return "", "", fmt.Errorf("plugin name %s is invalid. Name should be like {type-name}", path)
}
return strings.Join(parts[:len(parts)-1], "-"), parts[len(parts)-1], nil
}
func getProcessAttr(username string, groupname string) (*unix.SysProcAttr, error) {
uid, err := getUID(username)
if err != nil {
return nil, err
}View on GitHub (pinned to 909b515798)