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[bpf-next,v4,0/2] bpf, verifier: Improve precision of BPF_MUL

Message ID 20241218032337.12214-1-m.shachnai@gmail.com
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Series bpf, verifier: Improve precision of BPF_MUL | expand

Message

Matan Shachnai Dec. 18, 2024, 3:23 a.m. UTC 
Hi All,

This patch-set aims to improve precision of BPF_MUL and add testcases
to illustrate precision gains using signed and unsigned bounds. 

Thanks for taking the time to review and for all the feedback!

Best,
Matan

Changes from v1:
 - Fixed typo made in patch.

Changes from v2:
 - Added signed multiplication to BPF_MUL.
 - Added test cases to exercise BPF_MUL.
 - Reordered patches in the series.

Changes from v3:
 - Coding style fixes.

Matan Shachnai (2):
  bpf, verifier: Improve precision of BPF_MUL
  selftests/bpf: Add testcases for BPF_MUL

 kernel/bpf/verifier.c                         |  80 +++++------
 .../selftests/bpf/progs/verifier_bounds.c     | 134 ++++++++++++++++++
 2 files changed, 170 insertions(+), 44 deletions(-)