Re: [Alsa-user] Re: alsamixer crash! ALSA 1.0.0rc2

[Aravind]

Aravind wrote:
> [I am resending this email as the previous mail seems to have been lost]
>
>  Hi all,
>
>  alsamixer and amixer both get a seg fault at msort_with_tmp
>  within glibc. I am not sure whether the bug is in alsa-utils or
>  glibc or the patch that I applied to my kernel. No OSS emulation.
>  Sound card driver is es1968. aplay and arecord don't produce a
>  seg fault. Most probably the call to qsort within mixer.c in alsa-lib
>  triggers something when openwall patch is present I think. That's my
>  wild guess.
>
>  I have CCed both glibc and openwall.
>
>  My package versions are
>  Kernel:   2.4.23-ow1 (that is the openwall security patch)
>  glibc:    2.3.2-4.80.6
>  gcc:      3.2-7
>  binutils: 2.13.90.0.2-2
>  alsa-driver: 1.0.0rc2
>  alsa-lib: 1.0.0rc2
>  alsa-utils: 1.0.0rc2
>
>  thanks for any help.
>
>  Aravind
Hello All,

I found out the problem myself. alsa-lib uses nested functions and GCC
uses trampolines to implement them. As I had disabled trampoline support
in the openwall patch they were crashing. Ideally, alsa-lib should stop
using nested functions. I think the patch is trivial.

thanks

Aravind