[Freeswitch-users] Segfault

[Anthony Minessale]

I say first C then a bit of A on top of that to prevent the situation that
leads to that.


On Thu, Apr 17, 2008 at 3:51 PM, David Knell <dave at 3c.co.uk> wrote:

> Hi all -
>
> Just had an interesting FS segfault.  switch_xml_free (called from
> mod_xml_cdr) recursed 3500+ times
> and, I guess, the thing ran out of stack space.
>
> Having a look at the core dump shows that it's freeing a valid XML CDR
> structure for a call which
> wasn't cleared for ages; FS sat in a loop playing a prompt.  The net
> result would have been a CDR
> with a vast number of <application> lines, had the segfault not occurred.
>
> Fixes:
> (a) don't get in this situation in the first place;
> (b) rewrite switch_xml_free to eliminate recursion;
> (c) limit the number of children created in switch_ivr_generate_xml_cdr;
> - and probably some more.
>
> My favourite's (c) - any alternatives/objections?  If not, I'll pop this
> with a patch in Jira.
>
> Cheers --
>
> Dave
>
> --
> David Knell, Director, 3C Limited
> T: 020 8114 8901  F: 020 3002 7257  M: 001 415 630 3031
> http://www.3c.co.uk
>
>
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-- 
Anthony Minessale II

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