mir/bind
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/bind9 synced 2025-08-29 05:28:00 +00:00
Code Issues Releases Wiki Activity

1647. [bug] It was possible trigger a INSIST when chasing a DS

Browse Source 
record that required walking back over a empty node.
                        [RT #11445]
This commit is contained in:
Mark Andrews 2004-06-07 03:28:55 +00:00
parent 683b9e5e34
commit e5477896ce
2 changed files with 29 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
CHANGES
View File

@ -5,7 +5,9 @@
multiple dnssec-lookaside namespaces (not yet
implemented).
1647. [placeholder] rt11445
1647. [bug] It was possible trigger a INSIST when chasing a DS
record that required walking back over a empty node.
[RT #11445]
1646. [bug] win32: logging file versions didn't work with
non-UNC filenames. [RT#11486]
@ -125,7 +127,6 @@
1605. [func] New dns_db_find() option DNS_DBFIND_COVERINGNSEC.
1604. [bug] A xfrout_ctx_create() failure would result in
xfrout_ctx_destroy() being called with a
partially initaliased structure.

38
lib/dns/resolver.c
View File

@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: resolver.c,v 1.288 2004/05/14 04:45:56 marka Exp $ */
/* $Id: resolver.c,v 1.289 2004/06/07 03:28:55 marka Exp $ */
#include <config.h>
@ -4716,6 +4716,9 @@ resume_dslookup(isc_task_t *task, isc_event_t *event) {
isc_boolean_t bucket_empty = ISC_FALSE;
isc_boolean_t locked = ISC_FALSE;
unsigned int bucketnum;
dns_rdataset_t nameservers;
dns_fixedname_t fixed;
dns_name_t *domain;
REQUIRE(event->ev_type == DNS_EVENT_FETCHDONE);
fevent = (dns_fetchevent_t *)event;
@ -4731,15 +4734,17 @@ resume_dslookup(isc_task_t *task, isc_event_t *event) {
if (fevent->db != NULL)
dns_db_detach(&fevent->db);
dns_resolver_destroyfetch(&fctx->nsfetch);
dns_rdataset_init(&nameservers);
bucketnum = fctx->bucketnum;
if (fevent->result == ISC_R_CANCELED)
if (fevent->result == ISC_R_CANCELED) {
dns_resolver_destroyfetch(&fctx->nsfetch);
fctx_done(fctx, ISC_R_CANCELED);
else if (fevent->result == ISC_R_SUCCESS) {
} else if (fevent->result == ISC_R_SUCCESS) {
FCTXTRACE("resuming DS lookup");
dns_resolver_destroyfetch(&fctx->nsfetch);
if (dns_rdataset_isassociated(&fctx->nameservers))
dns_rdataset_disassociate(&fctx->nameservers);
dns_rdataset_clone(fevent->rdataset, &fctx->nameservers);
@ -4758,22 +4763,29 @@ resume_dslookup(isc_task_t *task, isc_event_t *event) {
} else {
unsigned int n;
/*
* Retrieve state from fctx->nsfetch before we destroy it.
*/
dns_fixedname_init(&fixed);
domain = dns_fixedname_name(&fixed);
dns_name_copy(&fctx->nsfetch->private->domain, domain, NULL);
dns_rdataset_clone(&fctx->nsfetch->private->nameservers,
&nameservers);
dns_resolver_destroyfetch(&fctx->nsfetch);
if (dns_name_equal(&fctx->nsname, domain)) {
fctx_done(fctx, DNS_R_SERVFAIL);
goto cleanup;
}
n = dns_name_countlabels(&fctx->nsname);
dns_name_getlabelsequence(&fctx->nsname, 1, n - 1,
&fctx->nsname);
if (dns_name_equal(&fctx->nsname, &fctx->domain)) {
fctx_done(fctx, DNS_R_SERVFAIL);
goto cleanup;
}
if (dns_rdataset_isassociated(fevent->rdataset))
dns_rdataset_disassociate(fevent->rdataset);
FCTXTRACE("continuing to look for parent's NS records");
result = dns_resolver_createfetch(fctx->res, &fctx->nsname,
dns_rdatatype_ns,
&fctx->domain,
&fctx->nameservers, NULL,
0, task,
dns_rdatatype_ns, domain,
&nameservers, NULL, 0, task,
resume_dslookup, fctx,
&fctx->nsrrset, NULL,
&fctx->nsfetch);
@ -4787,6 +4799,8 @@ resume_dslookup(isc_task_t *task, isc_event_t *event) {
}
cleanup:
if (dns_rdataset_isassociated(&nameservers))
dns_rdataset_disassociate(&nameservers);
if (dns_rdataset_isassociated(fevent->rdataset))
dns_rdataset_disassociate(fevent->rdataset);
INSIST(fevent->sigrdataset == NULL);