[PATCH] libasm: Fix use-after-free issue with circular single linked list cleanup

[Mark Wielaard]

Hi,

On Fri, 2023-02-17 at 15:00 +0100, Mark Wielaard wrote:
> Pointed out by gcc 12 with -Wuse-after-free=3
> 
> In function ‘free_section’
> asm_end.c:552:17: error: pointer ‘data’ used after ‘free’ [-Werror=use-after-free]
>   552 |     while (oldp != scnp->content);
>       |            ~~~~~^~~~~~~~~~~~~~~~
> asm_end.c:550:9: note: call to ‘free’ here
>   550 |         free (oldp);
>       |         ^~~~~~~~~~~
> 
> Fix by freeing scnp->content last.

I pushed this and also committed the attached patch that adds -Wuse-
after-free=3 if the compiler supports it.

Cheers,

Mark
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