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/55fc6114-7e64-4b65-86d2-92cfd1e9e92f@linux.dev/T... ---
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(-)