To reproduce:

* Install fresh Fedora 34 VM
* Compile Bitcoin Core and run `./test/functional/p2p_dns_seeds.py`
{
        allowed_syscalls.insert(__NR_clock_getres);  
        allowed_syscalls.insert(__NR_clock_gettime); 
    }
    void AllowGlobalProcessEnvironment()
    {
        allowed_syscalls.insert(__NR_getrlimit); 
        allowed_syscalls.insert(__NR_getrusage); 
        allowed_syscalls.insert(__NR_prlimit64); 
    }
    void AllowGlobalSystemStatus()
    {
        allowed_syscalls.insert(__NR_sysinfo); 
        allowed_syscalls.insert(__NR_uname);   
    }
    void AllowKernelInternalApi()
    {
        allowed_syscalls.insert(__NR_restart_syscall); 
    }
    void AllowNetwork()