Re: [PATCH 1/2] x86/kprobes: Fix kprobes instruction boudary check with CONFIG_RETHUNK

Peter Zijlstra
2022-09-07T12:57:04Z

On Wed, Sep 07, 2022 at 09:55:21AM +0900, Masami Hiramatsu (Google) wrote:

> if (!kallsyms_lookup_size_offset(paddr, NULL, &offset))
> return 0;
>

One more thing:

https://lkml.kernel.org/r/20220902130951.853460809@infradead.org

can result in negative offsets. The expression:

'paddr - offset'

will still get you to +0, but I might not have fully considered things
when I wrote that patch.