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Tue, 30 Dec 2025 09:53:21 -0800 (PST) Received: from [192.168.0.226] ([38.34.87.7]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3da7dabsm303555785ad.25.2025.12.30.09.53.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Dec 2025 09:53:21 -0800 (PST) Message-ID: <6f1e0708d302c8a4b92b17da54f9bbdb949bf953.camel@gmail.com> Subject: Re: [PATCH 0/2] bpf: calls to bpf_loop() should have an SCC and accumulate backedges From: Eduard Zingerman To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org Cc: daniel@iogearbox.net, martin.lau@linux.dev, kernel-team@fb.com, yonghong.song@linux.dev Date: Tue, 30 Dec 2025 09:53:19 -0800 In-Reply-To: <20251229-scc-for-callbacks-v1-0-ceadfe679900@gmail.com> References: <20251229-scc-for-callbacks-v1-0-ceadfe679900@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2025-12-29 at 23:13 -0800, Eduard Zingerman wrote: > This is a correctness fix for the verification of BPF programs that > work with callback-calling functions. The problem is the same as the > issue fixed by series [1] for iterator-based loops: some of the states > created while processing the callback function body might have > incomplete read or precision marks. I did not apply proper bpf-next tag to the patch-set. Will wait a few days for comments and resend, so that patchworks can pick this up.