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Fri, 20 Mar 2026 01:37:07 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b64703343sm4288450f8f.19.2026.03.20.01.37.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2026 01:37:06 -0700 (PDT) Date: Fri, 20 Mar 2026 11:37:03 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Ihor Solodrai , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, bpf@vger.kernel.org, kernel-team@meta.com Subject: Re: [PATCH bpf-next v2 1/2] bpf: Support struct btf_struct_meta via KF_IMPLICIT_ARGS Message-ID: <202603200410.ZnghNupo-lkp@intel.com> Precedence: bulk X-Mailing-List: bpf@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: <20260318223544.1789748-1-ihor.solodrai@linux.dev> Hi Ihor, kernel test robot noticed the following build warnings: url: https://github.com/intel-lab-lkp/linux/commits/Ihor-Solodrai/selftests-bpf-Update-kfuncs-using-btf_struct_meta-to-new-variants/20260319-070652 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20260318223544.1789748-1-ihor.solodrai%40linux.dev patch subject: [PATCH bpf-next v2 1/2] bpf: Support struct btf_struct_meta via KF_IMPLICIT_ARGS config: x86_64-randconfig-161-20260319 (https://download.01.org/0day-ci/archive/20260320/202603200410.ZnghNupo-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) rustc: rustc 1.88.0 (6b00bc388 2025-06-23) smatch: v0.5.0-9004-gb810ac53 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202603200410.ZnghNupo-lkp@intel.com/ smatch warnings: kernel/bpf/verifier.c:12760 is_bpf_rbtree_add_kfunc() error: buffer overflow 'special_kfunc_list' 64 <= 64 vim +/special_kfunc_list +12760 kernel/bpf/verifier.c 3700d7c829341d Ihor Solodrai 2026-03-18 12758 static bool is_bpf_rbtree_add_kfunc(u32 func_id) 3700d7c829341d Ihor Solodrai 2026-03-18 12759 { 3700d7c829341d Ihor Solodrai 2026-03-18 @12760 return func_id == special_kfunc_list[KF_bpf_rbtree_add] || ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Out of bounds. We need to make the special_kfunc_list[] bigger if we're going to keep adding new special_kfunc_type values. 3700d7c829341d Ihor Solodrai 2026-03-18 12761 func_id == special_kfunc_list[KF_bpf_rbtree_add_impl]; 3700d7c829341d Ihor Solodrai 2026-03-18 12762 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki