Re: [RFC 37/37] fs/binfmt_elf: Block old shstk elf bit

Edgecombe, Rick P
2022-11-07T16:50:15Z

On Sun, 2022-11-06 at 10:33 +0100, Florian Weimer wrote:
> * H. J. Lu:
>
> > This change doesn't make a binary CET compatible. It just requires
> > that the toolchain must be updated and all binaries have to be
> > recompiled with the new toolchain to enable CET. It doesn't solve
> > any
> > issue which can't be solved by not updating glibc.
>
> Right, and it doesn't even address the library case (the kernel would
> have to hook into mmap for that). The kernel shouldn't do this.

Shadow stack shouldn't enable as a result of loading a library, if
that's what you mean.