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Fixup crash if root prime has a timeout and parent qstate has been deleted.

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git-svn-id: file:///svn/unbound/trunk@1626 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2009-05-27 12:10:07 +00:00
parent 7758098250
commit 5e2189bb35
2 changed files with 15 additions and 8 deletions
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2
doc/Changelog
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@ -6,6 +6,8 @@
Most easily triggered on XP (not Vista), maybe because of the Most easily triggered on XP (not Vista), maybe because of the
network stack encouraging large messages backlogs. network stack encouraging large messages backlogs.
- change in debug statements. - change in debug statements.
- Fixed bug that could cause a crash if root prime failed when there
were message backlogs.
26 May 2009: Wouter 26 May 2009: Wouter
- Thanks again to Brett Carr, found an assertion that was not true. - Thanks again to Brett Carr, found an assertion that was not true.

21
iterator/iterator.c
View file

@ -551,12 +551,6 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq,
verbose(VERB_ALGO, "Cannot prime due to lack of hints"); verbose(VERB_ALGO, "Cannot prime due to lack of hints");
return 0; return 0;
} }
/* copy dp; to avoid messing up available list for other thr/queries */
dp = delegpt_copy(dp, qstate->region);
if(!dp) {
log_err("out of memory priming root, copydp");
return 0;
}
/* Priming requests start at the QUERYTARGETS state, skipping /* Priming requests start at the QUERYTARGETS state, skipping
* the normal INIT state logic (which would cause an infloop). */ * the normal INIT state logic (which would cause an infloop). */
if(!generate_sub_request((uint8_t*)"\000", 1, LDNS_RR_TYPE_NS, if(!generate_sub_request((uint8_t*)"\000", 1, LDNS_RR_TYPE_NS,
@ -568,8 +562,17 @@ prime_root(struct module_qstate* qstate, struct iter_qstate* iq,
if(subq) { if(subq) {
struct iter_qstate* subiq = struct iter_qstate* subiq =
(struct iter_qstate*)subq->minfo[id]; (struct iter_qstate*)subq->minfo[id];
/* Set the initial delegation point to the hint. */ /* Set the initial delegation point to the hint.
subiq->dp = dp; * copy dp, it is now part of the root prime query.
* dp was part of in the fixed hints structure. */
subiq->dp = delegpt_copy(dp, subq->region);
if(!subiq->dp) {
log_err("out of memory priming root, copydp");
fptr_ok(fptr_whitelist_modenv_kill_sub(
qstate->env->kill_sub));
(*qstate->env->kill_sub)(subq);
return 0;
}
/* there should not be any target queries. */ /* there should not be any target queries. */
subiq->num_target_queries = 0; subiq->num_target_queries = 0;
subiq->dnssec_expected = iter_indicates_dnssec( subiq->dnssec_expected = iter_indicates_dnssec(
@ -611,6 +614,8 @@ prime_stub(struct module_qstate* qstate, struct iter_qstate* iq,
/* is it a noprime stub (always use) */ /* is it a noprime stub (always use) */
if(stub->noprime) { if(stub->noprime) {
/* copy the dp out of the fixed hints structure, so that
* it can be changed when servicing this query */
iq->dp = delegpt_copy(stub_dp, qstate->region); iq->dp = delegpt_copy(stub_dp, qstate->region);
if(!iq->dp) { if(!iq->dp) {
log_err("out of memory priming stub"); log_err("out of memory priming stub");