[systemd-devel] resolved: Assertion 'n > 0' failed

[Kai Krakow]

Hello!

Sometimes I'm seeing messages like this:

[ 5780.379921] systemd-resolved[685]: Assertion 'n > 0' failed at 
/var/tmp/portage/sys-apps/systemd-219-
r2/work/systemd-219/src/resolve/resolved-dns-answer.c:28, function 
dns_answer_new(). Aborting.
[ 5780.621865] systemd-resolved[7396]: Assertion 'n > 0' failed at 
/var/tmp/portage/sys-apps/systemd-219-
r2/work/systemd-219/src/resolve/resolved-dns-answer.c:28, function 
dns_answer_new(). Aborting.

Looks like the process is aborted and restarted right after this (the PID 
changes) but the problem persists for a short duration. Then, everything is 
fine again. I didn't see problems in my desktop, tho. But I believe, if the 
DNS resolver gets timeouts (since it is using UDP) it will retry anyway.

My configuration is nothing special, DHCP, DNS, and IPv6 advertisement 
provided by my router:

$ networkctl
IDX LINK             TYPE               OPERATIONAL SETUP
  1 lo               loopback           carrier     unmanaged
  2 enp4s0           ether              routable    configured
  3 sit0             sit                off         unmanaged

3 links listed.

$ networkctl status enp4s0
● 2: enp4s0
   Link File: /usr/lib64/systemd/network/99-default.link
Network File: /etc/systemd/network/80-dhcp.network
        Type: ether
       State: routable (configured)
        Path: pci-0000:04:00.0
      Driver: r8169
      Vendor: Realtek Semiconductor Co., Ltd.
       Model: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller 
(Motherboard (one of many))
  HW Address: 00:25:22:xx:xx:xx (ASRock Incorporation)
         MTU: 1500
     Address: 192.168.4.45
              2002:xxxx:xxxx:x::xxxx:yyyy
              2002:xxxx:xxxx:x:xxxx:xxxx:xxxx:xxxx
              fe80::xxxx:xxxx:xxxx:xxxx
     Gateway: 192.168.4.254 (Cisco-Linksys, LLC)
              fe80::xxxx:xxxx:xxxx:xxxx (Cisco-Linksys, LLC)
         DNS: 192.168.4.254
      Domain: sol.local

$ cat /etc/systemd/network/80-dhcp.network
[Match]
Name=en*

[Network]
DHCP=yes

[DHCP]
UseDomains=true


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