Re: [Tinycc-devel] Fix boundschecking for signal/sigaction/fork

[Herman ten Brugge]

On 2020-09-17 22:28, grischka wrote:
> Herman ten Brugge via Tinycc-devel wrote:
> > +#if 0 /* does not work with fork */
> >      ptr = mmap (NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
> >      prx = mmap (NULL, size, PROT_READ|PROT_EXEC, MAP_SHARED, fd, 0);
> > +#else
> > +    ptr = prx = mmap (NULL, size, PROT_READ|PROT_WRITE|PROT_EXEC,
> > MAP_PRIVATE, fd, 0);
> > +#endif
>
> Might depend on what selinux features you have enabled but IIRC
> alpine musl for example did not allow to run code from memory
> that once was allocated as writable.
Thanks for the quick response.
I use fedora (32) and see no problem here.
But if it fails on another platform I will not commit the patch

    Herman