From: KaFai Wan <kafai.wan@linux.dev>
To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com,
andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com,
song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org,
sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org,
shuah@kernel.org, paul.chaignon@gmail.com, m.shachnai@gmail.com,
harishankar.vishwanathan@gmail.com, colin.i.king@gmail.com,
luis.gerhorst@fau.de, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: KaFai Wan <kafai.wan@linux.dev>
Subject: [PATCH bpf-next v2 0/2] bpf: Skip bounds adjustment for conditional jumps on same register
Date: Sat, 25 Oct 2025 13:30:15 +0800 [thread overview]
Message-ID: <20251025053017.2308823-1-kafai.wan@linux.dev> (raw)
This small patchset is about avoid verifier bug warning when conditional
jumps on same register when the register holds a scalar with range.
v2:
- Enhance is_branch_taken() and is_scalar_branch_taken() to handle
branch direction computation for same register. (Eduard and Alexei)
- Update the selftest.
v1:
https://lore.kernel.org/bpf/20251022164457.1203756-1-kafai.wan@linux.dev/
---
KaFai Wan (2):
bpf: Skip bounds adjustment for conditional jumps on same register
selftests/bpf: Add test for BPF_JGT on same register
kernel/bpf/verifier.c | 32 +++++++++++++++++++
.../selftests/bpf/progs/verifier_bounds.c | 18 +++++++++++
2 files changed, 50 insertions(+)
--
2.43.0
next reply other threads:[~2025-10-25 5:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-25 5:30 KaFai Wan [this message]
2025-10-25 5:30 ` [PATCH bpf-next v2 1/2] bpf: Skip bounds adjustment for conditional jumps on same register KaFai Wan
2025-10-27 20:09 ` Eduard Zingerman
2025-10-28 14:01 ` KaFai Wan
2025-10-25 5:30 ` [PATCH bpf-next v2 2/2] selftests/bpf: Add test for BPF_JGT " KaFai Wan
2025-10-27 19:40 ` Eduard Zingerman
2025-10-28 14:04 ` KaFai Wan
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