[isf-wifidog] seg fault

[Clifford Thurber]

Alex,
Thanks for your prompt reply. I am a little out of my league with gdb. I
tried to follow  your instructions but ended up with the following:

[root at wifidog ~]# gdb wifidog
GNU gdb Fedora (6.8-11.fc9)
Copyright (C) 2008 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-redhat-linux-gnu"...
wifidog: No such file or directory.
(gdb) -f -d 7
Undefined command: "-f".  Try "help".
(gdb) run -f -d 7
Starting program:  -f -d 7
No executable file specified.
Use the "file" or "exec-file" command.
(gdb) wifidog -f -d 7
Undefined command: "wifidog".  Try "help".
(gdb)


Thanks again for your help. If you could let me know what I am doing wrong
with the debugger I will post the stack trace ASAP.

Thanks
Clifford

On Mon, Jul 28, 2008 at 2:45 PM, acv <acv at miniguru.ca> wrote:

> This looks like a bug in util.c:get_iface_ip()
>
> A backtrace would be helpful. To get one ($ = unix shell, gdb> = gdb
> command
> prompt):
>
> $ gdb wifidog
>  .... load messages ....
> gdb> run <you_command_line_arguments here>
>  .... program output followed by seg fault ....
> gdb> bt
>  .... back trace ....
> gdb> exit
>
>        If possible, compile without optimization (no -O, -O2 flags on CC
> command-line) and debugging symbols (-g on CC command-line) that way we can
> get exact source-code line where the crash happens.
>
> Alex
>
> On Mon, Jul 28, 2008 at 02:20:05PM -0400, Clifford Thurber wrote:
> >
> > I checked out the latest wifidog and wifidog-auth last week and was able
> to
> > configure and compile everything successfuly. However when I start
> > wifidog(which is running on the same machine as the auth-server) I get a
> > segfault near the end of startup. When I run wifidog in the foreground
> this
> > is what I say before the seg fault:
> >
> >
> > [7][Mon Jul 28 11:10:23 2008](conf.c:389) p1 = [FirewallRule]; p2 =
> [allow
> > tcp port 67]
> > [7][Mon Jul 28 11:10:23 2008](conf.c:433) leftover: allow tcp port 67
> > [7][Mon Jul 28 11:10:23 2008](conf.c:515) Adding Firewall Rule allow tcp
> > port 67 to 0.0.0.0/0
> > [7][Mon Jul 28 11:10:23 2008](conf.c:413) Firewall Rule Set unknown-users
> > added.
> > [7][Mon Jul 28 11:10:23 2008](gateway.c:193) Finding IP address of eth1
> > Segmentation fault
> >
> >
> > I see the following in the logs shortly after:
> >
> >
> > Jul 28 11:10:04 wifidog kernel: wifidog[12304]: segfault at 2d8196c8 ip
> > 3ea6280eb0 sp 7fff3582bcc8 error 4 in libc-2.8.so[3ea6200000+162000]
> > Jul 28 11:10:12 wifidog kernel: wifidog[12307]: segfault at 65a46c8 ip
> > 3ea6280eb0 sp 7fff0e5b4a38 error 4 in libc-2.8.so[3ea6200000+162000]
> > Jul 28 11:10:23 wifidog kernel: wifidog[12308]: segfault at 342366c8 ip
> > 3ea6280eb0 sp 7fff3c2466c8 error 4 in libc-2.8.so[3ea6200000+162000]
> >
> >
> > Below is the related information for hardware/software versions:
> >
> > gcc --version
> > gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8)
> > Copyright (C) 2008 Free Software Foundation, Inc.
> > This is free software; see the source for copying conditions.  There is
> NO
> > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
> PURPOSE.
> >
> >
> > root at wifidog ~]# uname -a
> > Linux wifidog 2.6.25-14.fc9.x86_64 #1 SMP Thu May 1 06:06:21 EDT 2008
> x86_64
> > x86_64 x86_64 GNU/Linux
> >
> >
> > root at wifidog ~]# ldd /usr/bin/wifidog
> >     linux-vdso.so.1 =>  (0x00007fff9d5fe000)
> >     libhttpd.so.0 => /usr/lib64/libhttpd.so.0 (0x000000387b800000)
> >     libnsl.so.1 => /lib64/libnsl.so.1 (0x0000003eaf600000)
> >     libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003ea6e00000)
> >     libc.so.6 => /lib64/libc.so.6 (0x0000003ea6200000)
> >     /lib64/ld-linux-x86-64.so.2 (0x0000003ea5000000)
> >
> >
> > I get the seg fault whether I install wifidog from packages or compile
> from
> > source. Would someone be able to help me out with this? I am not sure
> where
> > to look at this point. Are there any known issues with the versions I am
> > using? I have looked through the FAQs and didn't see anything relevant to
> > this problem.
> >
> > Thanks
> > Clifford
>
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>
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