Bug#878238: xpp segfaults at startup in malloc called from cups httpConnect()

[Attila Kinali <attila@kinali.ch>]

Package: xpp
Version: 1.5-cvs20081009-3
Severity: important

Good afternoon,

I just upraded my computer from stretch to buster. After a reboot, xpp segfaults.
As I thought that it might have been some library symbols gone bad, I have
rebuilt the package from source, but it still didn't help.

The application crashes before it opens a window at all.

xpp-1.5-cvs20081009 $ gdb ./xpp
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./xpp...done.
(gdb) run
Starting program: /tmp/asdfadsf/xpp-1.5-cvs20081009/xpp 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6dd51cd in malloc_consolidate (
    av=av@entry=0x7ffff70f5b00 <main_arena>) at malloc.c:4221
4221	malloc.c: No such file or directory.
(gdb) bt
#0  0x00007ffff6dd51cd in malloc_consolidate (
    av=av@entry=0x7ffff70f5b00 <main_arena>) at malloc.c:4221
#1  0x00007ffff6dd6dfa in _int_malloc (
    av=av@entry=0x7ffff70f5b00 <main_arena>, bytes=bytes@entry=12808)
    at malloc.c:3488
#2  0x00007ffff6dd9b7b in __libc_calloc (n=<optimized out>, 
    elem_size=<optimized out>) at malloc.c:3274
#3  0x00007ffff7b809db in ?? () from /usr/lib/x86_64-linux-gnu/libcups.so.2
#4  0x00007ffff7b837d1 in httpConnect2 ()
   from /usr/lib/x86_64-linux-gnu/libcups.so.2
#5  0x00007ffff7b8382d in httpConnect ()
   from /usr/lib/x86_64-linux-gnu/libcups.so.2
#6  0x00005555555605ac in CupsHelper::processRequest (
    req=req@entry=0x555555809190, res=res@entry=0x555555568cea "/printers/")
    at cupshelper.cxx:105
#7  0x0000555555560ffa in printFiles::printFiles (this=0x55555579e030, 
    argc=<optimized out>, argv=<optimized out>, exitstat=<optimized out>)
    at xpp.cxx:325
#8  0x000055555555b63b in xppMainWindow::xppMainWindow (this=0x55555579deb0, 
    argc=1, argv=0x7fffffffe1e8, exitstat=@0x7fffffffe0e4: 0)
    at mainwindow.cxx:965
#9  0x0000555555558fa9 in main (argc=1, argv=0x7fffffffe1e8) at xppmain.cxx:51
(gdb) up 6
#6  0x00005555555605ac in CupsHelper::processRequest (
    req=req@entry=0x555555809190, res=res@entry=0x555555568cea "/printers/")
    at cupshelper.cxx:105
105	  http_t	*HTTP = httpConnect(host_,port_);
(gdb) p host_
$1 = "localhost\000cups.sock", '\000' <repeats 236 times>
(gdb) p port_
$2 = 631
(gdb) p *req
$3 = {state = IPP_STATE_IDLE, request = {any = {version = "\002", 
      op_status = 11, request_id = 1}, op = {version = "\002", 
      operation_id = IPP_OP_GET_PRINTER_ATTRIBUTES, request_id = 1}, status = {
      version = "\002", status_code = 11, request_id = 1}, event = {
      version = "\002", status_code = 11, request_id = 1}}, 
  attrs = 0x555555818cb0, last = 0x555555818ad0, current = 0x555555818ad0, 
  curtag = IPP_TAG_ZERO, prev = 0x555555818b10, use = 1, atend = 0, 
  curindex = 0}

>From what I can tell, the call to httpConnect() looks correct. I don't see why that should
cause a segfault.

Any help resolving this would be appreciated.

Thanks in advance.

			Attila Kinali

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages xpp depends on:
ii  libc6       2.24-17
ii  libcups2    2.2.4-7
ii  libfltk1.1  1.1.10-23
ii  libgcc1     1:7.2.0-8
ii  libstdc++6  7.2.0-8

xpp recommends no packages.

xpp suggests no packages.

-- no debconf information