[bpf-next v3 0/2] Fix kcm + sockmap by checking psock type

[John Fastabend <john.fastabend@gmail.com>]

We check if the sk_user_data (the psock in skmsg) is in fact a sockmap
type to late, after we read the refcnt which is an error. This
series moves the check up before reading refcnt and also adds a test
to test_maps to test trying to add a KCM socket into a sockmap.

While reviewig this code I also found an issue with KCM and kTLS
where each uses sk_data_ready hooks and associated stream parser
breaking expectations in kcm, ktls or both. But that fix will need
to go to net.

Thanks to Eric for reporting.

v2: Fix up file +/- my scripts lost track of them
v3: return EBUSY if refcnt is zero

John Fastabend (2):
  bpf: skmsg, fix psock create on existing kcm/tls port
  bpf: test_maps add a test to catch kcm + sockmap

 include/linux/skmsg.h                     | 25 +++++++++---
 net/core/sock_map.c                       | 11 +++---
 tools/testing/selftests/bpf/Makefile      |  2 +-
 tools/testing/selftests/bpf/sockmap_kcm.c | 14 +++++++
 tools/testing/selftests/bpf/test_maps.c   | 64 ++++++++++++++++++++++++++++++-
 5 files changed, 103 insertions(+), 13 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/sockmap_kcm.c

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1.9.1