On Sun, Dec 1, 2019 at 1:09 AM Borislav Petkov <bp@xxxxxxxxx> wrote: > > That generic ptdump stuff is probably causing a splat on 32-bit: > > https://lkml.kernel.org/r/20191125144946.GA6628@xxxxxxxxxx Hmm. I'm not sure about code generation, but for me that config gives me 60: 55 push %ebp 61: 89 e5 mov %esp,%ebp 63: 57 push %edi 64: 8b 4d 08 mov 0x8(%ebp),%ecx 67: 56 push %esi 68: 53 push %ebx 69: 8b 30 mov (%eax),%esi 6b: 8b 59 10 mov 0x10(%ecx),%ebx so that "ptdump_pte_entry+9" is the "mov (%eax),%esi" And that is "READ_ONCE(*pte)" So the pte pointer itself is broken. Which sounds really odd. Hmm. I've applied the whole series to a local branch, but I'm not merging it into my master branch yet. Can somebody figure out how the page walking could get that broken? Linus
