Jann Horn <ja...@google.com> wrote: > > Uh, no. bpf, for example, can be used to modify kernel memory. > > I'm pretty sure bpf isn't supposed to be able to modify arbitrary > kernel memory. AFAIU if you can use BPF to write to arbitrary kernel > memory, that's a bug; with CAP_SYS_ADMIN, you can read from userspace, > write to userspace, and read from kernelspace, but you shouldn't be > able to write to kernelspace.
Ah - you may be right. I seem to have misremembered what Joey Lee wrote in his patch description. David