[PATCH bpf-next v3 0/2] bpf, sockmap: disallow sockmap mutation from tc, xdp and flow_dissector

[Sechang Lim]

A tc, xdp or flow_dissector program updating or deleting a sockmap
deadlocks on stab->lock vs sk_callback_lock and has no reason to. Patch 1
disallows it in may_update_sockmap(); patch 2 drops the selftests that
exercised it.

v3:
 - drop the broken selftests (Jiayuan Chen)
 - drop the Fixes tag and target bpf-next (Jiayuan Chen)

v2:
 - https://lore.kernel.org/all/20260620034632.2308-1-rhkrqnwk98@xxxxxxxxx/

v1:
 - https://lore.kernel.org/all/20260616091153.2966617-1-rhkrqnwk98@xxxxxxxxx/

Sechang Lim (2):
  bpf, sockmap: disallow update and delete from tc, xdp and
    flow_dissector
  selftests/bpf: drop tc/xdp/flow_dissector sockmap mutation tests

 kernel/bpf/verifier.c                         |  4 --
 .../selftests/bpf/prog_tests/fexit_bpf2bpf.c  | 13 -----
 .../selftests/bpf/prog_tests/sockmap_basic.c  | 52 -------------------
 .../bpf/progs/freplace_cls_redirect.c         | 34 ------------
 .../selftests/bpf/progs/test_sockmap_update.c | 48 -----------------
 .../bpf/progs/verifier_sockmap_mutate.c       | 10 ++--
 6 files changed, 5 insertions(+), 156 deletions(-)
 delete mode 100644 tools/testing/selftests/bpf/progs/freplace_cls_redirect.c
 delete mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_update.c

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2.43.0