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2cce83e0d7
We recently fixed a bug where in some cases (when following an
expired CNAME for example), named could return SERVFAIL if the target
record is still valid (see isc-projects/bind9#3678, and
isc-projects/bind9!7096). We fixed this by considering non-stale
RRsets as well during the stale lookup.
However, this triggered a new bug because despite the answer from
cache not being stale, the lookup may be triggered by serve-stale.
If the answer from database is not stale, the fix in
isc-projects/bind9!7096 erroneously skips the serve-stale logic.
Add 'answer_found' checks to the serve-stale logic to fix this issue.
(cherry picked from commit
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| .. | ||
| include | ||
| tests | ||
| win32 | ||
| client.c | ||
| hooks.c | ||
| interfacemgr.c | ||
| Kyuafile | ||
| lib.c | ||
| listenlist.c | ||
| log.c | ||
| Makefile.in | ||
| notify.c | ||
| query.c | ||
| server.c | ||
| sortlist.c | ||
| stats.c | ||
| update.c | ||
| version.c | ||
| xfrout.c | ||