[PATCH bpf-next 0/5] bpf: Fix three bugs around constant blinding and nop removal

[Qiliang Yuan]

Alexei listed three bugs that were in the tree before the patch list
series [1]. Each patch fixes one, the last two add tests:

  bug                                                  fix   test
  line info stays blinded when the JIT falls back      1     -
  removing a nospec jump as a nop drops its barrier    2     4
  log_true_size misses an error from blinding          3     5

Patch 1 needs a JIT failure behind blinding with
CONFIG_BPF_JIT_ALWAYS_ON=n, which a selftest can't cause, so its log
shows a run with fail-nth instead. Each bug shows up on bpf-next and is
gone with its fix. test_verifier and test_progs show no new failures.

[1] https://lore.kernel.org/bpf/DMKHZS5B5CNO.186F6YH1T6YU4@xxxxxxxxx/

Signed-off-by: Qiliang Yuan <odys.yuan@xxxxxxxxx>
---
Qiliang Yuan (5):
      bpf: Put the line info back when the JIT falls back after blinding
      bpf: Keep the barrier of a nospec insn when removing nops
      bpf: Finalize the verifier log after the runtime is selected
      selftests/bpf: Cover a nospec jump that becomes a nop
      selftests/bpf: Test log_true_size with an error from blinding

 include/linux/bpf.h                                |  6 +++
 kernel/bpf/core.c                                  | 29 ++++++++++-
 kernel/bpf/fixups.c                                |  3 +-
 kernel/bpf/verifier.c                              | 13 +++--
 .../selftests/bpf/prog_tests/blinding_log.c        | 59 ++++++++++++++++++++++
 .../testing/selftests/bpf/progs/verifier_unpriv.c  | 35 +++++++++++++
 6 files changed, 138 insertions(+), 7 deletions(-)
---
base-commit: cd5bc55288d4fd999595c8f2af6a5408cbe92a52
change-id: 20261102-bpf-blind-nops-fixes-e45e91d65c75

Best regards,
-- 
Qiliang Yuan <odys.yuan@xxxxxxxxx>