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(-)
--
