Segfault With Invalid Credentials

<[email protected]> Wed, 29 Feb 2012 08:58:39 -0800

Newsgroups	gmane.comp.db.tds.freetds
Message-ID	<[email protected]>

Running against the nightly snapshot, I'm seeing a segfault when trying 
to connect to the remote server when using invalid credentials.

(gdb) bt
#0  0xf7fdf430 in ?? ()
#1  0xf7d9e0a8 in *__GI_abort () at abort.c:88
#2  0xf7dd8165 in __libc_message (do_abort=2, fmt=0xf7e973e8 "*** glibc 
detected *** %s: %s: 0x%s ***\n") at 
../sysdeps/unix/sysv/linux/libc_fatal.c:170
#3  0xf7dddfd4 in malloc_printerr (action=2, str=0xf7e942b1 "corrupted 
double-linked list", ptr=0x80647b8) at malloc.c:5994
#4  0xf7ddf697 in _int_free (av=0xf7eb2140, mem=0x8064840) at malloc.c:4717
#5  0xf7ddf8ac in *__GI___libc_free (mem=0x8064840) at malloc.c:3625
#6  0xf7f59f97 in tds_free_login (login=0x8064840) at mem.c:1066
#7  0xf7f4930a in ct_connect (con=0x80634b0, servername=0x80634f0 
"10.0.2.231", snamelen=-9) at ct.c:657

The error occurs in mem.c when trying to free the TDSLOGIN*. I noticed 
that the TDSLOGIN* allocated in tds_alloc_login is a different pointer 
than the one being passed to tds_free_login. Looking into it a bit 
closer the tds_free_login is failing on the TDSLOGIN* allocated from 
tds_alloc_connection -- if that helps.

-- 
Mitch Freed
[email protected]