[bpf,v4,0/2] bpf: fix recursive lock and add test

Message

Jiayuan Chen Nov. 18, 2024, 3:09 a.m. UTC

1. fix recursive lock when ebpf prog return SK_PASS.
2. add selftest to reproduce recursive lock.

Note that the test code can reproduce the 'dead-lock' and if just
the selftest merged without first patch, the test case will
definitely fail, because the issue of deadlock is inevitable.

---
v2->v4: fix line length reported by patchwork and remove unused code.
        (max_line_length is set to 80 in patchwork but default is 100 in kernel tree)
v1->v2: 1.inspired by martin.lau to add selftest to reproduce the issue.
        2. follow the community rules for patch.
        v1: https://lore.kernel.org/bpf/[e-mail]/T/#u
---

Jiayuan Chen (2):
  bpf: fix recursive lock when verdict program return SK_PASS
  selftests/bpf: Add some tests with sockmap SK_PASS

 net/core/skmsg.c                              |  4 +-
 .../selftests/bpf/prog_tests/sockmap_basic.c  | 54 +++++++++++++++++++
 2 files changed, 56 insertions(+), 2 deletions(-)