Re: [PATCH 15/17] arm64: add __nocfi to __apply_alternatives

Kees Cook
2021-03-12T02:51:28Z

On Thu, Mar 11, 2021 at 04:49:17PM -0800, Sami Tolvanen wrote:
> __apply_alternatives makes indirect calls to functions whose address
> is taken in assembly code using the alternative_cb macro. With
> non-canonical CFI, the compiler won't replace these function
> references with the jump table addresses, which trips CFI. Disable CFI
> checking in the function to work around the issue.
>
> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

Reviewed-by: Kees Cook <keescook@chromium.org>

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Kees Cook