Re: [PATCH v1 2/2] signal: add procfd_signal() syscall

[Christian Brauner]

On Wed, Nov 28, 2018 at 11:45:34AM -1000, Joey Pabalinas wrote:
> On Mon, Nov 19, 2018 at 11:32:39AM +0100, Christian Brauner wrote:
> > +	if (info) {
> > +		ret = __copy_siginfo_from_user(sig, &kinfo, info);
> > +		if (unlikely(ret))
> > +			goto err;
> 

I think you're misreading here. It jumps to:

err:
        fdput(f);
	return ret;

and does propagate the error. This is also an old iteration of the patch.

Christian

> What's the reason you don't propagate up the errors from __copy_siginfo_from_user()?
> Granted, I admit that -E2BIG is kind of weird to return, but -EFAULT seems like a
> fairly sane error.
> 
> Or is there some reason it's more useful to just return -EINVAL for all of the
> failure cases here?
> 
> -- 
> Cheers,
> Joey Pabalinas