[PATCH bpf-next v1 0/3] Fix missing process_iter_arg type check

[Kumar Kartikeya Dwivedi <memxor@gmail.com>]

I am taking over Tao's earlier patch set that can be found at [0], after
an offline discussion. The bug reported in that thread is that
process_iter_arg missed a reg->type == PTR_TO_STACK check. Fix this by
adding it in, and also address comments from Andrii on the earlier
attempt. Include more selftests to ensure the error is caught.

  [0]: https://lore.kernel.org/bpf/20241107214736.347630-1-tao.lyu@epfl.ch

Kumar Kartikeya Dwivedi (2):
  bpf: Zero index arg error string for dynptr and iter
  selftests/bpf: Add tests for iter arg check

Tao Lyu (1):
  bpf: Ensure reg is PTR_TO_STACK in process_iter_arg

 kernel/bpf/verifier.c                         | 17 +++++++-----
 .../testing/selftests/bpf/progs/dynptr_fail.c | 22 ++++++++--------
 tools/testing/selftests/bpf/progs/iters.c     | 26 +++++++++++++++++++
 .../selftests/bpf/progs/iters_state_safety.c  | 14 +++++-----
 .../selftests/bpf/progs/iters_testmod_seq.c   |  4 +--
 .../bpf/progs/test_kfunc_dynptr_param.c       |  2 +-
 .../selftests/bpf/progs/verifier_bits_iter.c  |  8 +++---
 7 files changed, 62 insertions(+), 31 deletions(-)


base-commit: c8d02b547363880d996f80c38cc8b997c7b90725
-- 
2.43.5