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

[Peter Zijlstra]

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@xxxxxxxxxxxxx

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.