linux-kernel - [PATCH bpf-next v3 0/4] bpf: Show precise rejected function when attaching to _

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Message-ID: <20250722153434.20571-1-kafai.wan@linux.dev>
Date: Tue, 22 Jul 2025 23:34:30 +0800
From: KaFai Wan <kafai.wan@...ux.dev>
To: ast@...nel.org,
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Subject: [PATCH bpf-next v3 0/4] bpf: Show precise rejected function when attaching to __noreturn and deny list functions

Show precise rejected function when attaching fexit/fmod_ret to __noreturn 
functions.
Add log for attaching tracing programs to functions in deny list.
Add selftest for attaching tracing programs to functions in deny list.
Migrate fexit_noreturns case into tracing_failure test suite.

changes:
v3:
- add tracing_deny case into existing files (Alexei)
- migrate fexit_noreturns into tracing_failure 
- change SOB

v2:
- change verifier log message (Alexei)
- add missing Suggested-by
  https://lore.kernel.org/bpf/20250714120408.1627128-1-mannkafai@gmail.com/

v1:
 https://lore.kernel.org/all/20250710162717.3808020-1-mannkafai@gmail.com/

---
KaFai Wan (4):
  bpf: Show precise rejected function when attaching fexit/fmod_ret to
    __noreturn functions
  bpf: Add log for attaching tracing programs to functions in deny list
  selftests/bpf: Add selftest for attaching tracing programs to
    functions in deny list
  selftests/bpf: Migrate fexit_noreturns case into tracing_failure test
    suite

 kernel/bpf/verifier.c                         |  5 +-
 .../bpf/prog_tests/fexit_noreturns.c          |  9 ----
 .../bpf/prog_tests/tracing_failure.c          | 52 +++++++++++++++++++
 .../selftests/bpf/progs/fexit_noreturns.c     | 15 ------
 .../selftests/bpf/progs/tracing_failure.c     | 12 +++++
 5 files changed, 68 insertions(+), 25 deletions(-)
 delete mode 100644 tools/testing/selftests/bpf/prog_tests/fexit_noreturns.c
 delete mode 100644 tools/testing/selftests/bpf/progs/fexit_noreturns.c

-- 
2.43.0