[PATCH v2] arm64: signal: Ensure signal delivery failure is recoverable

[Mark Brown]

On Tue, Dec 10, 2024 at 04:09:40PM +0000, Kevin Brodsky wrote:

> While at it, also take care of copy_siginfo_to_user(): since it may
> fail, we shouldn't be calling it after setup_return() either. Call
> it before setup_return() instead, and move the setting of X1/X2
> inside setup_return() where it belongs (after the "point of no
> failure").

> Fixes: eaf62ce1563b ("arm64/signal: Set up and restore the GCS context for signal handlers")

Presumably we also need a Fixes for whatever introduced the above copy.
Otherwise

Reviewed-by: Mark Brown <broonie at kernel.org>
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