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Segmentation fault miniupnpc-libevent Ubuntu 14.04

 
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jikard0



Joined: 05 Feb 2015
Posts: 8

PostPosted: Thu Feb 05, 2015 4:04 pm    Post subject: Segmentation fault miniupnpc-libevent Ubuntu 14.04 Reply with quote

Hello

After successful compile of miniupnpc-libevent. I run it and get
Segmentation fault.
Below is the output from gdb

# gdb ././upnpc-libevent
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
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 help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./upnpc-libevent ...done.
(gdb) run
Starting program: ./upnpc-libevent
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
local address : 10.0.10.103
Using libevent 2.0.21-stable
Using Libevent with backend method epoll.
READY ! 200
root_desc_location='http:\/\/10.0.10.1:2828/gateway.xml'

Program received signal SIGSEGV, Segmentation fault.
evhttp_request_get_response_code (req=req@entry=0x0) at http.c:3638
3638 return req->response_code;
(gdb)


Upnp enabled device(in my case mikrotik) return proper response with HTTP code 200.

Any ideas?

Regards
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miniupnp
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Posts: 1394

PostPosted: Thu Feb 05, 2015 5:50 pm    Post subject: Reply with quote

please give "backtrace" (bt command of gdb)
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jikard0



Joined: 05 Feb 2015
Posts: 8

PostPosted: Fri Feb 06, 2015 7:06 am    Post subject: backtrace Reply with quote

# gdb ./upnpc-libevent
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 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 ./pnpc-libevent...done.
(gdb) run
Starting program: /home/juka/workspace-cpp/ppsp-miniupnp/upnpc-libevent
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
local address : 10.0.10.103
Using libevent 2.0.21-stable
Using Libevent with backend method epoll.
UUUUU
READY ! 200
root_desc_location='http://10.0.10.1:2828/gateway.xml'

Program received signal SIGSEGV, Segmentation fault.
evhttp_request_get_response_code (req=req@entry=0x0) at http.c:3638
3638 return req->response_code;
(gdb) bt full
#0 evhttp_request_get_response_code (req=req@entry=0x0) at http.c:3638
No locals.
#1 0x0000000000402773 in upnpc_soap_response (req=0x0, pvoid=0x607970)
at miniupnpc-libevent.c:449
len = <optimized out>
data = <optimized out>
input_buffer = <optimized out>
d = 0x607970
code = <optimized out>
#2 0x00007ffff7bad418 in bufferevent_readcb (fd=<optimized out>,
event=<optimized out>, arg=0x609990) at bufferevent_sock.c:195
bufev = 0x609990
bufev_p = 0x609990
input = <optimized out>
res = <optimized out>
what = <optimized out>
howmuch = <optimized out>
readmax = <optimized out>
#3 0x00007ffff7ba2bfc in event_process_active_single_queue (activeq=0x607650,
base=0x607040) at event.c:1350
ev = 0x6099a0
count = 1
#4 event_process_active (base=<optimized out>) at event.c:1420
---Type <return> to continue, or q <return> to quit---
activeq = 0x607650
i = <optimized out>
c = 0
#5 event_base_loop (base=0x607040, flags=0) at event.c:1621
evsel = 0x7ffff7dd7c00 <epollops>
tv = {tv_sec = 50, tv_usec = 0}
tv_p = <optimized out>
res = <optimized out>
done = 0
retval = 0
__func__ = "event_base_loop"
#6 0x0000000000401d4b in main (argc=<optimized out>, argv=<optimized out>)
at upnp.cpp:239
sa = {__sigaction_handler = {sa_handler = 0x404200 <sighandler(int)>,
sa_sigaction = 0x404200 <sighandler(int)>}, sa_mask = {__val = {
0 <repeats 16 times>}}, sa_flags = 0, sa_restorer = 0x0}
upnp = {base = 0x607040, ssdp_socket = 6, ev_ssdp_recv = 0x607690,
ev_ssdp_writable = 0x6078c0, discover_device_index = 1,
devices = 0x607970,
ready_cb = 0x404220 <ready(int, upnpc_t*, upnpc_device_t*, void*)>,
soap_cb = 0x403f60 <soap(int, upnpc_t*, upnpc_device_t*, void*)>,
cb_data = 0x7fffffffdb10, local_address = 0x607670 "10.0.10.103",
local_port = 50001}
---Type <return> to continue, or q <return> to quit---
multicast_if = <optimized out>
(gdb)
(gdb) bt
#0 evhttp_request_get_response_code (req=req@entry=0x0) at http.c:3638
#1 0x0000000000402773 in upnpc_soap_response (req=0x0, pvoid=0x607970)
at miniupnpc-libevent.c:449
#2 0x00007ffff7bad418 in bufferevent_readcb (fd=<optimized out>,
event=<optimized out>, arg=0x609990) at bufferevent_sock.c:195
#3 0x00007ffff7ba2bfc in event_process_active_single_queue (activeq=0x607650,
base=0x607040) at event.c:1350
#4 event_process_active (base=<optimized out>) at event.c:1420
#5 event_base_loop (base=0x607040, flags=0) at event.c:1621
#6 0x0000000000401d4b in main (argc=<optimized out>, argv=<optimized out>)
at upnp.cpp:239
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miniupnp
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PostPosted: Fri Feb 06, 2015 9:27 am    Post subject: Reply with quote

I dont understand why req=0x0 ...
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jikard0



Joined: 05 Feb 2015
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PostPosted: Fri Feb 06, 2015 9:29 am    Post subject: Reply with quote

Exactly, i sniff it and answer is classical 200 OK
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miniupnp
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PostPosted: Fri Feb 06, 2015 9:48 am    Post subject: Reply with quote

Have you tried with another libevent2 library ?
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jikard0



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PostPosted: Fri Feb 06, 2015 10:28 am    Post subject: Reply with quote

i tried with official libevent-2.0.22-stable as also with your fork of libevent from
https://github.com/miniupnp/libevent.git(master and upnp_ext branches)
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jikard0



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PostPosted: Fri Feb 06, 2015 10:29 am    Post subject: Reply with quote

Oo i forgot with all version which i tried(above) i get same error.
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PostPosted: Fri Feb 06, 2015 11:51 am    Post subject: Reply with quote

check with this patch :  https://github.com/miniupnp/miniupnp/commit/37c649257baa822781cd71d9b80671f08a00288a
at least it won't crash
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jikard0



Joined: 05 Feb 2015
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PostPosted: Fri Feb 06, 2015 12:16 pm    Post subject: Reply with quote

Yes it wont crash.
However i will continue investigating why this not work as expected.
Thank you for help.
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