[asterisk-dev] 1.6.1.10-rc1 crash on a VOLUME() func

[Kaloyan Kovachev]

On Sat, 7 Nov 2009 10:40:13 +0100, Pavel Troller wrote
> Hi!
>   I just upgraded to 1.6.1.10-rc1 and it started to crash occasionally. By
> test-calling, I found that just one dialplan extension is causing the crash,
> which contained a Set(VOLUME(TX)=2) command.
>   The crash is detected as:
> *** glibc detected *** /opt/asterisk/sbin/asterisk: double free or
corruption (!prev): 0x092e7bc0 ***
>   but it seems that it doesn't appear directly in the code of the function
> mentioned; it looks that it just corrupts (or frees) some structure in memory,
> which then causes a subsequent crash at another place. Because func_volume.c
> code didn't change since I'm tracking the sources (from 1.6.1.0), it looks that
> some other change made the VOLUME() function incompatible with the current
> code, or some hidden bug present in the code for a longer time has been
> activated. I was trying to find a cause in the patch text, but I failed.
>   I just know, that
>   1) In 1.6.1.7-rc2 it was working perfectly
>   2) In 1.6.10.1-rc1, removing the above command prevents the crashes.
> 
>   Any help would be appreciated; I'm ready to experiment with possible patches.
> 

It is probably not the patch you are loking for, but there is one 'ready for
review' at https://issues.asterisk.org/view.php?id=14621 which is a rewrite of
function volume ... it may or may not fix your crash ... in case there are
some changes in the audiohooks code - the crash might be because they were not
made to the function's own audiohook implementation

>   With regards, Pavel Troller
> 
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