[PATCH v4 bpf-next 0/2] Range tracking for BPF_NEG

[Song Liu <song@kernel.org>]

Add range tracking for BPF_NEG. Please see commit log of 1/2 for more
details.

---

Changes v3 => v4:
1. Fix selftest verifier_value_ptr_arith.c. (Eduard)

v3: https://lore.kernel.org/bpf/20250624233328.313573-1-song@kernel.org/

Changes v2 => v3:
1. Minor changes in the selftests. (Eduard)

v2: https://lore.kernel.org/bpf/20250624220038.656646-1-song@kernel.org/

Changes v1 => v2:
1. Split new selftests to a separate patch. (Eduard)
2. Reset reg id on BPF_NEG. (Eduard)
3. Use env->fake_reg instead of a bpf_reg_state on the stack. (Eduard)
4. Add __msg for passing selftests.

v1: https://lore.kernel.org/bpf/20250624172320.2923031-1-song@kernel.org/

Song Liu (2):
  bpf: Add range tracking for BPF_NEG
  selftests/bpf: Add tests for BPF_NEG range tracking logic

 include/linux/tnum.h                          |  2 +
 kernel/bpf/tnum.c                             |  5 ++
 kernel/bpf/verifier.c                         | 17 ++++-
 .../bpf/progs/verifier_bounds_deduction.c     | 11 +--
 .../selftests/bpf/progs/verifier_precision.c  | 70 +++++++++++++++++++
 .../bpf/progs/verifier_value_ptr_arith.c      | 22 ++++--
 6 files changed, 116 insertions(+), 11 deletions(-)

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2.47.1