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([2620:10d:c090:500::4:ca20]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b54a35b7e31sm5111359a12.11.2025.09.12.09.48.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Sep 2025 09:48:08 -0700 (PDT) Message-ID: Subject: Re: [PATCH bpf-next v1 09/10] bpf: disable and remove registers chain based liveness From: Eduard Zingerman To: Dan Carpenter , oe-kbuild@lists.linux.dev, bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, daniel@iogearbox.net, martin.lau@linux.dev, kernel-team@fb.com, yonghong.song@linux.dev Date: Fri, 12 Sep 2025 09:48:06 -0700 In-Reply-To: <202509120205.YfzyI2gp-lkp@intel.com> References: <202509120205.YfzyI2gp-lkp@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-1.fc42) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2025-09-12 at 11:17 +0300, Dan Carpenter wrote: > Hi Eduard, >=20 > kernel test robot noticed the following build warnings: >=20 > url: https://github.com/intel-lab-lkp/linux/commits/Eduard-Zingerman/b= pf-bpf_verifier_state-cleaned-flag-instead-of-REG_LIVE_DONE/20250911-090604 > base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git = master > patch link: https://lore.kernel.org/r/20250911010437.2779173-10-eddyz8= 7%40gmail.com > patch subject: [PATCH bpf-next v1 09/10] bpf: disable and remove register= s chain based liveness > config: arm-randconfig-r071-20250911 (https://download.01.org/0day-ci/arc= hive/20250912/202509120205.YfzyI2gp-lkp@intel.com/config) > compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 2= 1857ae337e0892a5522b6e7337899caa61de2a6) >=20 > If you fix the issue in a separate patch/commit (i.e. not just a new vers= ion of > the same patch/commit), kindly add following tags > > Reported-by: kernel test robot > > Reported-by: Dan Carpenter > > Closes: https://lore.kernel.org/r/202509120205.YfzyI2gp-lkp@intel.com/ >=20 > smatch warnings: > kernel/bpf/verifier.c:19305 is_state_visited() error: uninitialized symbo= l 'err'. Hi Dan, Thank you for the report, kernel test robot already notified me here: https://lore.kernel.org/bpf/20250911010437.2779173-1-eddyz87@gmail.com/T/#m= 103a269f4c096b34043bef16fa5f1d629b794968 Thanks, Eduard [...]