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Merge branch '1540-bind-aborts-when-queried-for-non-existing-domain-in-chaos-class' into 'master'

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Resolve "bind 9.14.8 and 9.14.9 aborts when queried for non-existing domain in chaos class"

Closes #1569 and #1540

See merge request isc-projects/bind9!2843
This commit is contained in:
Evan Hunt
2020-01-22 20:24:38 +00:00
parent 754f7588c6 42e1fb8322
commit a2254f01c4
5 changed files with 34 additions and 6 deletions
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4
CHANGES
View File

@@ -1,3 +1,7 @@
5350. [bug] When a view was configured with class CHAOS, the
server could crash while processing a query for a
non-existent record. [GL #1540]
5349. [bug] Fix a race in task_pause/unpause. [GL #1571]
5348. [bug] dnssec-settime -Psync was not being honoured.

5
bin/tests/system/resolver/ns1/chaostest.db Normal file
View File

@@ -0,0 +1,5 @@
$TTL 3600
@ CHAOS SOA @ @ 1970010100 86400 600 86400 300
@ CHAOS NS @
version CHAOS TXT "CH 1.0"
hostname CHAOS TXT "unknown"

5
bin/tests/system/resolver/ns1/named.conf.in
View File

@@ -46,7 +46,10 @@ server fd92:7065:b8e:ffff::1000 {
* "globalcache" before the recursive "default"/IN view is configured.
*/
view "class" chaos {
match-clients { none; };
zone "chaostest" CHAOS {
type master;
file "chaostest.db";
};
};
/*

8
bin/tests/system/resolver/tests.sh
View File

@@ -805,5 +805,13 @@ grep "running as: .* -m record,size,mctx " ns1/named.run > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo_i "checking NXDOMAIN is returned when querying non existing domain in CH class ($n)"
ret=0
$DIG $DIGOPTS @10.53.0.1 id.hostname txt ch > dig.ns1.out.${n} || ret=1
grep "status: NXDOMAIN" dig.ns1.out.${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=`expr $status + $ret`
echo_i "exit status: $status"
[ $status -eq 0 ] || exit 1

18
lib/dns/view.c
View File

@@ -1245,8 +1245,9 @@ dns_view_findzonecut(dns_view_t *view, const dns_name_t *name,
ztoptions |= DNS_ZTFIND_NOEXACT;
result = dns_zt_find(view->zonetable, name, ztoptions,
NULL, &zone);
} else
} else {
result = ISC_R_NOTFOUND;
}
UNLOCK(&view->lock);
if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH)
result = dns_zone_getdb(zone, &db);
@@ -1261,12 +1262,15 @@ dns_view_findzonecut(dns_view_t *view, const dns_name_t *name,
* We have a cache; try it.
*/
dns_db_attach(view->cachedb, &db);
} else {
} else if (use_hints && view->hints != NULL) {
/*
* Maybe we have hints...
*/
try_hints = true;
goto finish;
} else {
result = DNS_R_NXDOMAIN;
goto cleanup;
}
} else if (result != ISC_R_SUCCESS) {
/*
@@ -1287,6 +1291,7 @@ dns_view_findzonecut(dns_view_t *view, const dns_name_t *name,
result = ISC_R_SUCCESS;
else if (result != ISC_R_SUCCESS)
goto cleanup;
if (use_cache && view->cachedb != NULL && db != view->hints) {
/*
* We found an answer, but the cache may be better.
@@ -1327,13 +1332,16 @@ dns_view_findzonecut(dns_view_t *view, const dns_name_t *name,
* have a zone delegation, so use it.
*/
use_zone = true;
} else {
result = ISC_R_SUCCESS;
} else if (use_hints && view->hints != NULL) {
/*
* Maybe we have hints...
*/
try_hints = true;
result = ISC_R_SUCCESS;
} else {
result = DNS_R_NXDOMAIN;
}
result = ISC_R_SUCCESS;
} else {
/*
* Something bad happened.
@@ -1358,7 +1366,7 @@ dns_view_findzonecut(dns_view_t *view, const dns_name_t *name,
if (sigrdataset != NULL &&
dns_rdataset_isassociated(&zrdataset))
dns_rdataset_clone(&zsigrdataset, sigrdataset);
} else if (try_hints && use_hints && view->hints != NULL) {
} else if (try_hints) {
/*
* We've found nothing so far, but we have hints.
*/