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Merge branch '3478-dig-lookup-reference-counting-bug-v9_18' into 'v9_18'

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[v9_18] DiG: fix lookup reference counting bug

See merge request isc-projects/bind9!6640
This commit is contained in:
Arаm Sаrgsyаn 2022-08-08 11:43:13 +00:00
commit 18bdce8477
3 changed files with 12 additions and 1 deletions
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3
CHANGES
View file

@ -1,3 +1,6 @@
5935. [bug] Fix DiG lookup reference counting bug, which could
be observed in NSSEARCH mode. [GL #3478]
5934. [func] Improve fetches-per-zone fetch limit logging to log
the final allowed and spilled values of the fetch
counters before the counter object gets destroyed.

8
bin/dig/dighost.c
View file

@ -1828,11 +1828,19 @@ clear_current_lookup(void) {
return;
}
if (lookup->cleared) {
debug("current_lookup is already cleared");
return;
}
if (ISC_LIST_HEAD(lookup->q) != NULL) {
debug("still have a worker");
return;
}
lookup->cleared = true;
debug("lookup cleared");
lookup_detach(&lookup);
}

2
bin/dig/dighost.h
View file

@ -105,7 +105,7 @@ typedef struct dig_searchlist dig_searchlist_t;
struct dig_lookup {
unsigned int magic;
isc_refcount_t references;
bool aaonly, adflag, badcookie, besteffort, cdflag, comments,
bool aaonly, adflag, badcookie, besteffort, cdflag, cleared, comments,
dns64prefix, dnssec, doing_xfr, done_as_is, ednsneg, expandaaaa,
expire, header_only, identify, /*%< Append an "on server <foo>"
message */