On 11/4/24 09:50, Kumar Kartikeya Dwivedi wrote: > While reading invalid memory is a rare case that should not happen, > it may be possible if some kernel field contains a stale address > etc. Reading random (unaccepted) memory in a TDX guest is fatal, even from kernel addresses. We had a lot of fun even getting load_unaligned_zeropad() to work. So, honestly, if you've letting buggy BFP programs get loaded and read random memory (kernel or user), you've got bigger problems than a verbose kernel panic when the buggy program happens to touch userspace. I'd rather not hack code into the page fault handler to add to the illusion that this is a good idea or safe in any way.
