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[2a01:cb08:8949:7e00:9a0d:3db0:9e2f:2ffb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4606f2cd6c2sm38392917f8f.30.2026.06.15.15.51.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 15:51:36 -0700 (PDT) Date: Tue, 16 Jun 2026 00:51:34 +0200 From: Paul Chaignon To: Zhenzhong Wu Cc: bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, haoluo@google.com, jolsa@kernel.org, menglong8.dong@gmail.com, eddyz87@gmail.com, shung-hsi.yu@suse.com, stable@vger.kernel.org, mykolal@fb.com, tamird@kernel.org, Sasha Levin Subject: Re: [PATCH stable 6.6.y v3 0/4] bpf: linked scalar precision fixes Message-ID: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Jun 15, 2026 at 12:58:37AM +0800, Zhenzhong Wu wrote: > Hi, > > This v3 targets 6.6.y and changes the backport strategy based on review > feedback on v2. [...] > Relevant QEMU selftest results on 6.6.y with this backport: > > verifier_scalar_ids passed all 18 subtests, including the newly > backported linked-scalar precision tests and the related > check_ids_in_regsafe tests. The first patch in this backport series is actually breaking the "precise: test 1" selftest from test_verifier. You can see the full error at [1]. I haven't yet checked if it's the test or the backport that needs to be adjusted. 1: https://github.com/shunghsiyu/libbpf/actions/runs/27575831217/job/81523786835 > > Thanks to Shung-Hsi Yu for reviewing v2 and suggesting the upstream > linked-scalar precision series as the preferred backport direction. > > Eduard Zingerman (4): > bpf: Track equal scalars history on per-instruction level > bpf: Remove mark_precise_scalar_ids() > selftests/bpf: Tests for per-insn sync_linked_regs() precision > tracking > selftests/bpf: Update comments find_equal_scalars->sync_linked_regs > > include/linux/bpf_verifier.h | 4 + > kernel/bpf/verifier.c | 367 +++++++++++------- > .../selftests/bpf/progs/verifier_scalar_ids.c | 253 ++++++++---- > .../selftests/bpf/progs/verifier_spill_fill.c | 4 +- > .../bpf/progs/verifier_subprog_precision.c | 2 +- > .../testing/selftests/bpf/verifier/precise.c | 2 +- > 6 files changed, 417 insertions(+), 215 deletions(-) > > > base-commit: 924b4a879cbb75aef37c160b955b92f6894b11a4 > -- > 2.43.0