| Date | Thu, 11 Mar 2021 18:46:30 -0800 | From | Kees Cook <> | Subject | Re: [PATCH 13/17] arm64: use __pa_function |
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On Thu, Mar 11, 2021 at 04:49:15PM -0800, Sami Tolvanen wrote: > With CONFIG_CFI_CLANG, the compiler replaces function address > references with the address of the function's CFI jump table > entry. This means that __pa_symbol(function) returns the physical > address of the jump table entry, which can lead to address space > confusion as the jump table points to the function's virtual > address. Therefore, use the __pa_function() macro to ensure we are > always taking the address of the actual function instead. > > Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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