Re: [PATCH] fs/binfmt_elf.c: disallow zero entry point address

[Linus Torvalds]

[ Crossed emails ]

On Sun, Dec 12, 2021 at 11:30 AM H.J. Lu <hjl.tools@xxxxxxxxx> wrote:
>
> On Linux, the start of the first PT_LOAD segment is the ELF
> header and the address 0 points to the ELF magic bytes which
> isn't a valid code sequence.

Yeah, then I think a much more valid argument (and patch) is _that_ argument.

So that kind of explanation, along with a patch more along the line of that

        if (elf_ex->e_entry < header_sizes)
                goto out;

I suggested, and not talking about paper standards that may or may not
be relevant.

That would be much more palatable to me - it's a _technical_ argument,
not a "some paper standard that we clearly have never followed"
argument.

                Linus