[Dovecot] Seg fault in dovecot/auth 2.0.15

[Mark Goldey]

Sorry about the HTML. 

I removed the string "-O2" from the /auth Makefile and, for good
measure, did make clean, make and make install for all of Dovecot.

Still, it crashed when trying to log in via IMAP (webmail).  Core
dumped, here's the backtrace. 


[snip]
Core was generated by `dovecot/auth -w'.
Program terminated with signal 11, Segmentation fault.
#0  0x00000000 in ?? ()
(gdb) bt full
#0  0x00000000 in ?? ()
No symbol table info available.
#1  0x0805b0c7 in auth_worker_handle_user (client=0x82754d0, id=2,
args=0x82601c8) at auth-worker-client.c:405
        auth_request = 0x82776e8
        userdb_id = 1
#2  0x0805b630 in auth_worker_handle_line (client=0x82754d0,
    line=0x82757da
"2\tUSER\t1\tuser=mgoldXX at goldey.net\tservice=imap\toriginal_username=mgoldXX at goldey.net\trequested_login_user\tlip=127.0.0.1\trip=127.0.0.1\tlport=143\trport=47574\tsecured=1\tsuccessful=1\tmech=PLAIN")
at auth-worker-client.c:534
        args = 0x82601c0
        id = 2
        ret = false
#3  0x0805b890 in auth_worker_input (client=0x82754d0) at
auth-worker-client.c:614
        _data_stack_cur_id = 3
        line = 0x82757da
"2\tUSER\t1\tuser=mgoldXX at goldey.net\tservice=imap\toriginal_username=mgoldXX at goldey.net\trequested_login_user\tlip=127.0.0.1\trip=127.0.0.1\tlport=143\trport=47574\tsecured=1\tsuccessful=1\tmech=PLAIN"
        ret = 183
#4  0xb7726021 in io_loop_call_io (io=0x8275688) at ioloop.c:384
        ioloop = 0x8268398
        t_id = 2
#5  0xb77270d3 in io_loop_handler_run (ioloop=0x8268398) at
ioloop-epoll.c:213
        ctx = 0x8273f38
        event = 0x8273f78
        list = 0x82756b0
        io = 0xbf80049f
        tv = {tv_sec = 2147483, tv_usec = 0}
        msecs = 1
        ret = 1
        i = 0
        j = 0
        call = 192
#6  0xb7725fa0 in io_loop_run (ioloop=0x8268398) at ioloop.c:405
No locals.
#7  0xb7711baa in master_service_run (service=0x82682e8,
callback=0x805e466 <worker_connected>) at master-service.c:481
No locals.
#8  0x0805e7aa in main (argc=2, argv=0x82681c0) at main.c:298
        c = -1

And, for good measure:

(gdb) fr 1
#1  0x0805b0c7 in auth_worker_handle_user (client=0x82754d0, id=2,
args=0x82601c8) at auth-worker-client.c:405
405        auth_request->userdb->userdb->iface->

(gdb) p *auth_request->userdb->userdb
$1 = {args = 0x8268d10 "", cache_key = 0x0, blocking = true, id = 1,
init_refcount = 1, iface = 0x807b320}

(gdb) p *auth_request->userdb->userdb->iface
$2 = {name = 0x8074f3d "vpopmail", preinit = 0x8069a27
<vpopmail_preinit>, init = 0, deinit = 0,
  lookup = 0x806975f <vpopmail_lookup>, iterate_init = 0, iterate_next =
0, iterate_deinit = 0}


This is all Greek to me, but I'm happy to do more troubleshooting.

--mhg