Re: [PATCH 20/20] signal: Don't restart fork when signals come in.

[Linus Torvalds]

On Tue, Jul 24, 2018 at 1:05 PM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:
>
> What I hear you asking is  moving up copy_signal copy_sighand copy_creds
> and alloc_pid, and anything else that signal delivery might depend on.

No, _just_ signal allocation.

It would still just use the special-case list to set the pending bit.
No creds, no "full task", nothing like that.

> I really want something very simple and straight forward because I don't
> see us testing or hitting this code path much in practice.  Moving this
> into the middle of fork and adding more depedencies does not seem like
> it will be that kind of straight forward.

I think your "list on the stack" was anything but straightforward,
considering how utterly broken the error handling of the patch was.

But hey., send a fixed patch and see how it looks. I think you'll end
up adding a lot of "goto signal_cleanup" cases.

          Linus