Comment 33 for bug 1934221

Unfortunately, this patch does not seem to be sufficient.

It produces very similar segfaults in on_query_timeout (https://errors.ubuntu.com/problem/c4e5be3f1c7af9483993c7e6007b9325ab5b78cd) than the segfault we could observe before (https://errors.ubuntu.com/problem/bb0ce4ff8e6ef86041cfb5647b792823a20b44f7)

We want to revert the patch in Focal (systemd v245) for now (LP: #1943982), while we'll try to fix the root cause in Hirsute (systemd v247), adding more relevant patches that were added to systemd-stable v247 (but not systemd-stable v245):
https://github.com/systemd/systemd-stable/commits/v247-stable/src/resolve/resolved-dns-query.c
https://github.com/systemd/systemd-stable/commit/64317106aed94a6fb758ab6b08ba490873fc5227
https://github.com/systemd/systemd-stable/commit/91ba2eac4b6b463026b3a93e5a139923e8f2cfe4
https://github.com/systemd/systemd-stable/commit/ab9f7e1a51005f12d3bac83b86716d9d33048eb7
https://github.com/systemd/systemd-stable/commit/78a43c33c8847ebbc2d3cf530ebe304924c58b32
https://github.com/systemd/systemd-stable/commit/c8d7fab2286384b19ff6328cece107c4c02d7bb8

If root-causing is successful, we might back-port those patches to Focal, too.