[bpf-next,v2,0/4] Fixes for stack with allow_ptr_leaks

Message

Kumar Kartikeya Dwivedi Nov. 27, 2024, 9:20 p.m. UTC

Two fixes for usability/correctness gaps when interacting with the stack
without CAP_PERFMON (i.e. with allow_ptr_leaks = false). See the commits
for details. I've verified that the tests fail when run without the fixes.

Changelog:
----------
v1 -> v2
v1: https://lore.kernel.org/bpf/[e-mail]

 * Fix CI errors in selftest by removing dependence on BPF_ST

Kumar Kartikeya Dwivedi (3):
  bpf: Don't relax STACK_INVALID to STACK_MISC when not allow_ptr_leaks
  selftests/bpf: Add test for reading from STACK_INVALID slots
  selftests/bpf: Add test for narrow spill into 64-bit spilled scalar

Tao Lyu (1):
  bpf: Fix narrow scalar spill onto 64-bit spilled scalar slots

 kernel/bpf/verifier.c                         |  3 +-
 .../selftests/bpf/prog_tests/verifier.c       | 41 ++++++++++++++++---
 .../selftests/bpf/progs/verifier_spill_fill.c | 18 ++++----
 .../bpf/progs/verifier_stack_noperfmon.c      | 36 ++++++++++++++++
 4 files changed, 82 insertions(+), 16 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/progs/verifier_stack_noperfmon.c


base-commit: c8d02b547363880d996f80c38cc8b997c7b90725