On Thu, Sep 10, 2020 at 12:22:53PM -0500, Josh Poimboeuf wrote:
> +/*
> + * Sanitize a user pointer such that it becomes NULL if it's not a valid user
> + * pointer. This prevents speculative dereferences of user-controlled
> pointers
> + * to kernel space when access_ok() speculatively returns true. This should
> be
> + * done *after* access_ok(), to avoid affecting error handling behavior.
Err, stupid question: can this macro then be folded into access_ok() so
that you don't have to touch so many places and the check can happen
automatically?
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
