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


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