On Tue, Feb 27, 2024 at 1:48 PM Linus Walleij [off-list ref] wrote:

On Tue, Feb 27, 2024 at 2:06 AM Kees Cook [off-list ref] wrote:

quoted

I wasn't able to build with CONFIG_FTRACE=y; I got this link error:
ld.lld: error: undefined symbol: ftrace_stub_graph
(FWIW, I'm building against v6.8-rc2, maybe I need a different base?)

I get that too, from the buildbots, but I'm clueless about what it is.
All of it is in generic code, nothing ARM32-specific, maybe some bug
in v6.8-rc1 that was fixed (I wish...) Sami?

You need to just define a separate stub for graph tracing with KCFI to
avoid type mismatches. Something like this:

https://lore.kernel.org/all/20230710183544.999540-11-samitolvanen@google.com/ (local)

Sami

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