On Thu, Nov 07, 2019 at 10:40:23PM -0800, Alexei Starovoitov wrote: > Add bpf_arch_text_poke() helper that is used by BPF trampoline logic to patch > nops/calls in kernel text into calls into BPF trampoline and to patch > calls/nops inside BPF programs too. This thing assumes the text is unused, right? That isn't spelled out anywhere. The implementation is very much unsafe vs concurrent execution of the text.
