Re: Need help with dns_query patch

Il giorno gio, 14/07/2005 alle 09.52 -0600, Duane Wessels ha scritto:
> I can (mostly) understand the RFC1035 code, but I cannot reproduce this
> bug. Can you reproduce it?
>
> If you can get a core file and stack trace that would be helpful.
> Also if you know anything about the type of nameserver that Squid
> is using in this case (BIND, dnscache, etc)?
>
> Since the URL contains an IP address, Squid should not issue
> a name-to-address DNS query. Perhaps Squid is configured to make
> address-to-name (PTR) queries and this is why the rfc1035.c code
> gets called for this request.

Hi Duane,
one of the users that are affected by this bug managed to trace it,
again using an URL with an ip address (http://193.99.144.85/).

This is what backtrace printed:

#0 0x400c9781 in kill () from /lib/libc.so.6
#1 0x4004ee5e in pthread_kill () from /lib/libpthread.so.0
#2 0x4004f339 in raise () from /lib/libpthread.so.0
#3 0x400cabe1 in abort () from /lib/libc.so.6
#4 0x400c3e42 in __assert_fail () from /lib/libc.so.6
#5 0x080b270d in rfc1035RRUnpack (buf=0x80f3740 "\027N\201\200", sz=68, off=0xbfff6b78, RR=0x85bb038) at rfc1035.c:410
#6 0x080b2b0c in rfc1035MessageUnpack (buf=0x80f3740 "\027N\201\200", sz=68, answer=0xbfff6ba8) at rfc1035.c:600
#7 0x08065598 in idnsGrokReply (buf=0x80f3740 "\027N\201\200", sz=68) at dns_internal.c:337
#8 0x080659f2 in idnsRead (fd=8, data=0xbfff6c30) at dns_internal.c:452
#9 0x080612bb in comm_check_incoming_poll_handlers (nfds=1, fds=0xbfff6cd0) at comm_select.c:236
#10 0x08061e1b in comm_poll_dns_incoming () at comm_select.c:900
#11 0x08061c9e in comm_poll (msec=10) at comm_select.c:484
#12 0x0807fd54 in main (argc=2, argv=0xbfffefd4) at main.c:741

Regards,

-- 
 Luigi Gangitano -- <luigi@debian.org> -- <gangitano@lugroma3.org>
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