[PATCH v2 bpf-next 0/2] bpf, verifier: Correct tail_call_reachable for bpf prog

[Leon Hwang <hffilwlqm@gmail.com>]

It's confusing to inspect 'prog->aux->tail_call_reachable' with drgn[0],
when bpf prog has tail call but 'tail_call_reachable' is false.

This patch corrects 'tail_call_reachable' when bpf prog has tail call.

Therefore, it's unnecessary to detect tail call in x86 jit. Let's remove
it.

Changes:
v1 -> v2:
* Address comment from Yonghong:
  * Remove unnecessary tail call detection in x86 jit.

---

Links:
[0] https://github.com/osandov/drgn

Leon Hwang (2):
  bpf, verifier: Correct tail_call_reachable for bpf prog
  bpf, x64: Remove tail call detection

 arch/x86/net/bpf_jit_comp.c | 11 ++---------
 kernel/bpf/verifier.c       |  4 +++-
 2 files changed, 5 insertions(+), 10 deletions(-)


base-commit: 2c6987105026a4395935a3db665c54eb1bafe782
-- 
2.44.0