[isf-wifidog] output

Clifford Thurber clifford at hdn.net
Mar 29 Juil 14:36:24 EDT 2008


Interesting. Can I provide you with anything else that might help you?

Thanks
Clifford

On Tue, Jul 29, 2008 at 2:32 PM, acv <acv at miniguru.ca> wrote:

> On Tue, Jul 29, 2008 at 01:41:04PM -0400, Clifford Thurber wrote:
> > Date: Tue, 29 Jul 2008 13:41:04 -0400
> > From: "Clifford Thurber" <clifford at hdn.net>
> > To: acv at miniguru.ca
> > Subject: output
> >
> > Hi Alex,
> > This is what I am seeing now:
> >
> [ ... snip ... ]
> > called. Trying to reap a child
> > [7][Mon Jul 28 14:47:27 2008][26253](gateway.c:263) Handler for SIGCHLD
> > reaped child PID -1
> > [7][Mon Jul 28 14:47:27 2008][26253](util.c:121) Process PID 26358 exited
> > [7][Mon Jul 28 14:47:27 2008][26253](centralserver.c:327) Level 1:
> > Connecting to auth server auth.ilesansfil.org:80
> > *** glibc detected *** wifidog: free(): invalid pointer:
> 0x0000003ea656a0c0
> > ***
> > ======= Backtrace: =========
> > /lib64/libc.so.6[0x3ea6278158]
> > /lib64/libc.so.6(cfree+0x76)[0x3ea627a796]
> > wifidog[0x4081ef]
> > wifidog[0x407d35]
> > wifidog[0x40baab]
>
> Congratulations, you found a hidden bug. Most versions of libc silently
> ignore when an application tries to free() memory that's already been
> free()'d. Gentoo, Ubuntu and apparently now Fedora have started enabling
> optional behaviour in the free() system call to exit out when that happens.
> This was originally implemented for debugging purpose.
>
> Now we have to find where free() gets called twice... Probably when
> connecting
> to the Auth Server.
>
> Alex
>
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