Fix for UDP sockets getting leaked during sockmap lookup/release.
Accompanied by selftests updates.

Signed-off-by: Michal Luczaj <redacted>
---
Changes in v2:
- selftest: drop the original, adapt old tests
- fix: change approach to rejecting unbound UDP [Kuniyuki]
- Link to v1: https://patch.msgid.link/20260623-sockmap-lookup-udp-leak-v1-0-05804f9308e4@rbox.co

---
Michal Luczaj (4):
      bpf, sockmap: Reject unhashed UDP sockets on sockmap update
      selftests/bpf: Ensure UDP sockets are bound
      selftests/bpf: Adapt sockmap update error handling
      selftests/bpf: Fail unbound UDP on sockmap update

 net/core/sock_map.c                                     |  2 ++
 tools/testing/selftests/bpf/prog_tests/sockmap_basic.c  |  6 +++---
 tools/testing/selftests/bpf/prog_tests/sockmap_listen.c | 17 +++++++++--------
 tools/testing/selftests/bpf/test_maps.c                 |  6 +++---
 4 files changed, 17 insertions(+), 14 deletions(-)
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base-commit: 26490a375cb9be9bac96b5171610fd85ca6c2305
change-id: 20260617-sockmap-lookup-udp-leak-bc4e5c5481d7

Best regards,
--  
Michal Luczaj [off-list ref]