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.