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[master] avoid double-free in rrl

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- RRL could assert when freeing qname
 - also, changed test addresses from 192.168/16 to 192.0/16
This commit is contained in:
Evan Hunt
2013-02-26 19:15:11 -08:00
parent d654c95c96
commit 68357e5241
4 changed files with 15 additions and 14 deletions
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10
bin/tests/system/rrl/ns2/tld2.db
View File

@@ -22,21 +22,21 @@ $TTL 120
NS .
ns A 10.53.0.2
a1 A 192.168.2.1
a1 A 192.0.2.1
*.a2 A 192.168.2.2
*.a2 A 192.0.2.2
; a3 is in tld3
; a4 does not exist to give NXDOMAIN
; a5 for TCP requests
a5 A 192.168.2.5
a5 A 192.0.2.5
; a6 for whitelisted clients
a6 A 192.168.2.6
a6 A 192.0.2.6
; a7 for SERVFAIL
; a8 for all-per-second limit
$GENERATE 101-180 all$.a8 A 192.168.2.8
$GENERATE 101-180 all$.a8 A 192.0.2.8

2
bin/tests/system/rrl/ns3/tld3.db
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@@ -22,4 +22,4 @@ $TTL 120
NS .
ns A 10.53.0.3
*.a3 A 192.168.3.3
*.a3 A 192.0.3.3

14
bin/tests/system/rrl/tests.sh
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@@ -156,11 +156,11 @@ burst 30 'x$CNT.a2.tld2'
# IP TC drop NXDOMAIN SERVFAIL
# check for 24 results
# including the 1 second delay
ck_result a1.tld2 192.168.2.1 3 7 14 0 0
ck_result a1.tld2 192.0.2.1 3 7 14 0 0
# Check the wild card answers.
# The parent name of the 30 requests is counted.
ck_result 'x*.a2.tld2' 192.168.2.2 2 10 18 0 0
ck_result 'x*.a2.tld2' 192.0.2.2 2 10 18 0 0
#########
@@ -173,7 +173,7 @@ burst 20 'z$CNT.a4.tld2'
# The first answer is counted separately because it is counted against
# the rate limit on recursing to the server for a3.tld3. The remaining 20
# are counted as local responses from the cache.
ck_result 'y*.a3.tld3' 192.168.3.3 3 6 12 0 0
ck_result 'y*.a3.tld3' 192.0.3.3 3 6 12 0 0
# NXDOMAIN responses are also limited based on the parent name.
ck_result 'z*.a4.tld2' x 0 6 12 2 0
@@ -187,14 +187,14 @@ burst 20 a6.tld2 -b $ns7
burst 20 a7.tld4
# TCP responses are not rate limited
ck_result a5.tld2 192.168.2.5 20 0 0 0 0
ck_result a5.tld2 192.0.2.5 20 0 0 0 0
# whitelisted client is not rate limited
ck_result a6.tld2 192.168.2.6 20 0 0 0 0
ck_result a6.tld2 192.0.2.6 20 0 0 0 0
# Errors such as SERVFAIL are rate limited. The numbers are confusing, because
# other rate limiting can be triggered before the SERVFAIL limit is reached.
ck_result a7.tld4 192.168.2.1 0 6 12 0 2
ck_result a7.tld4 192.0.2.1 0 6 12 0 2
#########
@@ -204,7 +204,7 @@ sec_start
# The qnames are all unique but the client IP address is constant.
CNT=101
burst 80 'all$CNT.a8.tld2'
ck_result 'a*.a8.tld2' 192.168.2.8 70 0 10 0 0
ck_result 'a*.a8.tld2' 192.0.2.8 70 0 10 0 0
$RNDC -c $SYSTEMTESTTOP/common/rndc.conf -p 9953 -s $ns2 stats

3
lib/dns/rrl.c
View File

@@ -786,7 +786,8 @@ free_qname(dns_rrl_t *rrl, dns_rrl_entry_t *e) {
qbuf = get_qname(rrl, e);
if (qbuf != NULL) {
qbuf->e = NULL;
ISC_LIST_APPEND(rrl->qname_free, qbuf, link);
if (!ISC_LINK_LINKED(qbuf, link))
ISC_LIST_APPEND(rrl->qname_free, qbuf, link);
}
}