Emil, I ran into this problem with an old self-maintained dbndjb 1.05-9 package's tinydns, but mine hung after just one or two queries after a recent upgrade (including libc6 2.32-4) and reboot.
My ./run file was: exec envuidgid tinydns envdir ./env softlimit -d300000 /usr/bin/tinydns I tried running manually with strace interspersed, but that refused to start until I dropped the softlimit -d300000 (data segment size), and then it ran fine. That got me to thinking that the problem is running out of memory. So I bumped up -d300000 to -d350000 in ./run and tinydns runs quite well now. The tinydns 1.05-13 package uses chpst (from runit) instead of softlimit (from daemontools), but I think the intent is the same. I conjecture that something in libc6 2.32 increased the size of the data segment. The work around/fix is to increase the data segment limit in tinydns package's ./run file. Ideally, tinydns should detect the problem and complain. That would have saved a lot of frustration.
