This small patchset is about avoid infinite recursion in TCP header option
callbacks via TCP_NODELAY setsockopt.

v2:
 - Reject TCP_NODELAY in bpf_sock_ops_setsockopt() (AI and Martin)

v1:
 https://lore.kernel.org/bpf/20260414112310.1285783-1-kafai.wan@linux.dev/

---
KaFai Wan (2):
  bpf: Reject TCP_NODELAY in TCP header option callbacks
  selftests/bpf: Test TCP_NODELAY in TCP hdr opt callbacks

 net/core/filter.c                             |  5 ++
 .../bpf/prog_tests/tcp_hdr_options.c          | 54 +++++++++++++++++++
 .../bpf/progs/test_misc_tcp_hdr_options.c     | 40 ++++++++++++++
 3 files changed, 99 insertions(+)

-- 
2.43.0