[Dnsmasq-discuss] Segfault with DNSSEC

[simon at simongoodall.co.uk]

Hi,

I'm getting a segfault running dnsmasq with dnssec enabled.

Logs show the following;

dnsmasq[10172]: query[AAAA] www.ncbi.nlm.nih.gov from 192.168.1.4
dnsmasq[10172]: forwarded www.ncbi.nlm.nih.gov to 8.8.8.8
dnsmasq[10172]: forwarded www.ncbi.nlm.nih.gov to 8.8.8.4
dnsmasq[10172]: forwarded www.ncbi.nlm.nih.gov to 2001:4860:4860::8888
dnsmasq[10172]: forwarded www.ncbi.nlm.nih.gov to 2001:4860:4860::8844
dnsmasq[10172]: dnssec-query[DNSKEY] ncbi.nlm.nih.gov to 8.8.8.8
dnsmasq[10172]: query[A] www.ncbi.nlm.nih.gov from 192.168.1.4
dnsmasq[10172]: forwarded www.ncbi.nlm.nih.gov to 8.8.8.8
dnsmasq[10172]: query[AAAA] www.ncbi.nlm.nih.gov from 192.168.1.4
dnsmasq[10172]: dnssec retry to 0.0.0.0

and running in gdb yields;

#0  0x00024e44 in forward_query (udpfd=8, udpaddr=0xbefff7c0, dst_addr=0xbefff7ac, 
    dst_iface=2, header=0x71de8, plen=45, now=1395350397, forward=0x84430, ad_reqd=0, 
    do_bit=0) at forward.c:294
#1  0x0002790c in receive_query (listen=0x74768, now=1395350397) at forward.c:1280
#2  0x000313a0 in check_dns_listeners (set=0xbefff8b8, now=1395350397) at dnsmasq.c:1436
#3  0x0002fc1c in main (argc=4, argv=0xbefffcf4) at dnsmasq.c:951
(gdb) 

(gdb) print forward
$1 = (struct frec *) 0x84430
(gdb) print forward->rfd6
$2 = (struct randfd *) 0x0
(gdb) 

I am running version from git -  v2.69test11.9.g0c8584e  on an arch linux arm box. I am regularly seeing a segfault when browsing this site, although not for every query.

Regards,

Simon