[V2 PATCH net-next 0/2] Fixes for XDP_REDIRECT map

[Jesper Dangaard Brouer <brouer@redhat.com>]

This my V2 of catching XDP_REDIRECT and bpf_redirect_map() API usage
that can potentially crash the kernel.  Addressed Daniels feedback in
patch01, and added patch02 which catch and cleanup dangling map
pointers.

I know John and Daniel are working on a more long-term solution, of
recording the bpf_prog pointer together with the map pointer.  I just
wanted to propose these fixes as a stop-gap to the potential crashes.

---

Jesper Dangaard Brouer (2):
      xdp: implement xdp_redirect_map for generic XDP
      xdp: catch invalid XDP_REDIRECT API usage


 include/linux/filter.h     |    1 +
 include/trace/events/xdp.h |    4 ++--
 net/core/dev.c             |    3 +++
 net/core/filter.c          |   39 ++++++++++++++++++++++++++++++++++++---
 4 files changed, 42 insertions(+), 5 deletions(-)