[Bug 1822416] Re: resolve: do not hit CNAME or DNAME entry in NODATA cache

[Eric Desrochers]

Bionic has been applied via LP: #1818527 introduced in version:

systemd (237-3ubuntu10.23) bionic; urgency=medium

  * d/p/resolved-do-not-hit-CNAME-in-NODATA.patch:
    - fix stub resolver cache (LP: #1818527)


** Changed in: systemd (Ubuntu Bionic)
       Status: Confirmed => Fix Released

** Changed in: systemd (Ubuntu Bionic)
     Assignee: Eric Desrochers (slashd) => (unassigned)

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Title:
  resolve: do not hit CNAME or DNAME entry in NODATA cache

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Bionic:
  Fix Released
Status in systemd source package in Disco:
  Fix Released
Status in systemd source package in Eoan:
  Fix Released
Status in systemd source package in Focal:
  Fix Released

Bug description:
  The question: DNS A record lookups fail to resolve due to cached CNAME
  NODATA lookups ...

  https://askubuntu.com/questions/1063462/18-04-server-systemd-resolve-
  returns-cached-cname-nodata-for-a-lookup

  Upstream at Github: Systemd issue 998 - Cached cname NODATA returned
  for A lookup ...

  https://github.com/systemd/systemd/issues/9833

  
  Please patch ...

  https://github.com/systemd/systemd/commit/3740146a4cbd99883af79e375ee4836206dcea4e

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