https://bugs.exim.org/show_bug.cgi?id=2443
--- Comment #5 from Bertrand Jacquin <bertrand@???> ---
(In reply to Bertrand Jacquin from comment #4)
> (In reply to Jeremy Harris from comment #3)
> > The case is tested in the testsuite (testcase 0467, last subtest), so we'll
> > need to find out what differs here. Can you get a testrun with full debug
> > enabled? Also, a stacktrace from a coredump would help - though that's
> > harder,
> > exim usually being installed setuid.
>
> Of course. I will provide coredump and stacktrace during the week.
Please find attached a small configuration which replicated the observed issue
along with a compressed coredump.
# gdb /usr/sbin/exim /tmp/core-exim.24671.e5-build1.1569164502
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Reading symbols from /usr/sbin/exim...
Reading symbols from /usr/lib/debug//usr/sbin/exim.debug...
[New LWP 24671]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/sbin/exim -C /home/beber/bug-2443.conf -bt
daniel@???'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055a1213674d3 in dns_basic_lookup (type=33, name=0x55a123141b10
"octaforge.org", dnsa=0x7ffd6b177600) at dns.c:736
736 while (*checkname++ != '.');
(gdb) set height 0
(gdb) set print pretty on
(gdb) set print elements 0
(gdb) set filename-display absolute
(gdb) bt
#0 0x000055a1213674d3 in dns_basic_lookup (type=33, name=0x55a123141b10
"octaforge.org", dnsa=0x7ffd6b177600) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:736
#1 dns_basic_lookup (dnsa=0x7ffd6b177600, name=<optimized out>, type=33) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:661
#2 0x000055a1213676fd in dns_lookup (dnsa=0x7ffd6b177600, name=0x55a123141a10
"octaforge.org", type=33, fully_qualified_name=0x7ffd6b1771c8) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:896
#3 0x000055a12137c2ad in dns_lookup_timerwrap (dnsa=0x7ffd6b177600,
name=0x55a123141968 "_smtp._tcp.octaforge.org", type=33,
fully_qualified_name=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/host.c:136
#4 0x000055a12137f129 in host_find_bydns (host=<optimized out>,
host@entry=0x7ffd6b1877e0, ignore_target_hosts=0x55a12312f890 "0.0.0.0 :
127.0.0.0/8", whichrrs=whichrrs@entry=31,
srv_service=srv_service@entry=0x55a12312f8a8 "smtp",
srv_fail_domains=<optimized out>, mx_fail_domains=<optimized out>,
dnssec_d=0x55a12312f808, fully_qualified_name=0x7ffd6b1877d0,
removed=0x7ffd6b1877cc) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/host.c:2610
#5 0x000055a1213d2905 in dnslookup_router_entry (rblock=0x55a12312f678,
addr=0x55a123141710, pw=<optimized out>, verify=<optimized out>,
addr_local=<optimized out>, addr_remote=<optimized out>, addr_new=<optimized
out>,
addr_succeed=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/routers/dnslookup.c:301
#6 0x000055a1213a1377 in route_address (addr=addr@entry=0x55a123141710,
paddr_local=paddr_local@entry=0x7ffd6b187af8,
paddr_remote=paddr_remote@entry=0x7ffd6b187af0,
addr_new=addr_new@entry=0x7ffd6b187ae8,
addr_succeed=addr_succeed@entry=0x7ffd6b187b00, verify=verify@entry=0) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/route.c:1687
#7 0x000055a1213c63e2 in verify_address (vaddr=0x55a123141710,
fp=0x7f44a9aef5c0 <_IO_2_1_stdout_>, options=6, callout=-1, callout_overall=-1,
callout_connect=-1, se_mailfrom=0x0, pm_mailfrom=0x0, routed=0x0)
at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/verify.c:1822
#8 0x000055a1213688de in test_address (s=<optimized out>, flags=6,
exit_value=0x7ffd6b187d50) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/exim.c:753
#9 0x000055a12134bec7 in main (argc=5, cargv=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/exim.c:4792
(gdb) fr 0
#0 0x000055a1213674d3 in dns_basic_lookup (type=33, name=0x55a123141b10
"octaforge.org", dnsa=0x7ffd6b177600) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:736
736 while (*checkname++ != '.');
(gdb) fr 1
#1 dns_basic_lookup (dnsa=0x7ffd6b177600, name=<optimized out>, type=33) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:661
661 dns_basic_lookup(dns_answer *dnsa, const uschar *name, int type)
(gdb) fr 2
#2 0x000055a1213676fd in dns_lookup (dnsa=0x7ffd6b177600, name=0x55a123141a10
"octaforge.org", type=33, fully_qualified_name=0x7ffd6b1771c8) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:896
896 if ((rc = dns_basic_lookup(dnsa, name, type)) != DNS_SUCCEED)
(gdb) fr 3
#3 0x000055a12137c2ad in dns_lookup_timerwrap (dnsa=0x7ffd6b177600,
name=0x55a123141968 "_smtp._tcp.octaforge.org", type=33,
fully_qualified_name=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/host.c:136
136 return dns_lookup(dnsa, name, type, fully_qualified_name);
(gdb) fr 4
#4 0x000055a12137f129 in host_find_bydns (host=<optimized out>,
host@entry=0x7ffd6b1877e0, ignore_target_hosts=0x55a12312f890 "0.0.0.0 :
127.0.0.0/8", whichrrs=whichrrs@entry=31,
srv_service=srv_service@entry=0x55a12312f8a8 "smtp",
srv_fail_domains=<optimized out>, mx_fail_domains=<optimized out>,
dnssec_d=0x55a12312f808, fully_qualified_name=0x7ffd6b1877d0,
removed=0x7ffd6b1877cc) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/host.c:2610
2610 rc = dns_lookup_timerwrap(&dnsa, temp_fully_qualified_name, ind_type,
(gdb) fr 5
#5 0x000055a1213d2905 in dnslookup_router_entry (rblock=0x55a12312f678,
addr=0x55a123141710, pw=<optimized out>, verify=<optimized out>,
addr_local=<optimized out>, addr_remote=<optimized out>, addr_new=<optimized
out>,
addr_succeed=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/routers/dnslookup.c:301
301 rc = host_find_bydns(&h, CUS rblock->ignore_target_hosts, flags,
(gdb) fr 6
#6 0x000055a1213a1377 in route_address (addr=addr@entry=0x55a123141710,
paddr_local=paddr_local@entry=0x7ffd6b187af8,
paddr_remote=paddr_remote@entry=0x7ffd6b187af0,
addr_new=addr_new@entry=0x7ffd6b187ae8,
addr_succeed=addr_succeed@entry=0x7ffd6b187b00, verify=verify@entry=0) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/route.c:1687
1687 yield = (r->info->code)(r, addr, pw, verify, paddr_local,
paddr_remote,
(gdb) fr 7
#7 0x000055a1213c63e2 in verify_address (vaddr=0x55a123141710,
fp=0x7f44a9aef5c0 <_IO_2_1_stdout_>, options=6, callout=-1, callout_overall=-1,
callout_connect=-1, se_mailfrom=0x0, pm_mailfrom=0x0, routed=0x0)
at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/verify.c:1822
1822 rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
(gdb) fr 8
#8 0x000055a1213688de in test_address (s=<optimized out>, flags=6,
exit_value=0x7ffd6b187d50) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/exim.c:753
753 int rc = verify_address(deliver_make_addr(address,TRUE), stdout,
flags, -1,
(gdb) fr 9
#9 0x000055a12134bec7 in main (argc=5, cargv=<optimized out>) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/exim.c:4792
4792 test_address(s, flags, &exit_value);
(gdb) fr 0
#0 0x000055a1213674d3 in dns_basic_lookup (type=33, name=0x55a123141b10
"octaforge.org", dnsa=0x7ffd6b177600) at
/usr/src/debug/mail-mta/exim-4.92.2/exim-4.92.2/build-exim-gentoo/dns.c:736
736 while (*checkname++ != '.');
(gdb) info args
type = 33
name = 0x55a123141b10 "octaforge.org"
dnsa = 0x7ffd6b177600
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