ModResult OnCheckBan(User *user, Channel *c, const std::string& mask)
{
- if (mask[0] == 'O' && mask[1] == ':')
+ if ((mask.length() > 2) && (mask[0] == 'O') && (mask[1] == ':'))
{
if (IS_OPER(user) && InspIRCd::Match(user->oper->name, mask.substr(2)))
return MOD_RES_DENY;