Description of problem:

When booting with a static IP address configured on kernel command line, the following message is seen:

dracut-initqueue[XXX]: RTNETLINK answers: Network is unreachable

This is due to having the following code snippet in network-legacy dracut module:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
 98 do_static() {
 :
104     elif ! linkup "$netif"; then
 :
109     ip route get "$ip" | {
110         read a rest
111         if [ "$a" = "local" ]; then
112             warn "Not assigning $ip to interface $netif, cause it is already assigned!"
113             return 1
114         fi
115         return 0
116     } || return 1
 :
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

On line 104, a "linkup" is made, but no IP address assigned (that's expected).
Then on line 109 a "ip route get <ip>" is made to check if the <ip> is already assigned.
Due to not having an IP address yet (which is expected), the "RTNETLINK answers: Network is unreachable" message is printed to stderr, while it should be hidden from the user.


Version-Release number of selected component (if applicable):

dracut RH7 and RH8


How reproducible:

Always

Steps to Reproduce:
1. Boot with a static IP address on kernel command line

  ip=192.168.122.86::192.168.122.1:24:test:enp1s0:none

2. Check the console or journal

  # journalctl -b | grep RTNET

Actual results:

Sep 16 17:17:51 vm-rhel8 dracut-initqueue[472]: RTNETLINK answers: Network is unreachable

Expected results:

Nothing printed

Additional info:

Suggested fix:

109     ip route get "$ip" 2>/dev/null | {