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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-341d0b47ee3sm3992031a91.2.2025.11.07.17.16.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Nov 2025 17:16:55 -0800 (PST) Date: Fri, 7 Nov 2025 17:09:09 -0800 From: Stephen Hemminger To: Marat Khalili Cc: Konstantin Ananyev , "dev@dpdk.org" Subject: Re: [PATCH v4 3/5] bpf: add a test for BPF ELF load Message-ID: <20251107170859.0f618ab2@phoenix> In-Reply-To: <2fd10b3a010f495b82cbbcfef29dd9df@huawei.com> References: <20251030173732.246435-1-stephen@networkplumber.org> <20251104160843.304044-1-stephen@networkplumber.org> <20251104160843.304044-4-stephen@networkplumber.org> <2951855794674cada3b9ab9574699917@huawei.com> <2fd10b3a010f495b82cbbcfef29dd9df@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Fri, 7 Nov 2025 17:45:51 +0000 Marat Khalili wrote: > P.S. When running with UB sanitizer: > > RTE>>bpf_elf_load_autotest > BPF: resolve_xsym(40): EBPF_PSEUDO_CALL to external function: dummy_func1 > ../../src/lib/bpf/bpf_validate.c:247:24: runtime error: signed integer overflow: 9223372036854775807 + 2147483647 cannot be represented in type 'long int' > #0 0x2b1fdca in eval_add ../../src/lib/bpf/bpf_validate.c:247 > #1 0x2b2b9dc in eval_alu ../../src/lib/bpf/bpf_validate.c:691 > #2 0x2b3b187 in evaluate ../../src/lib/bpf/bpf_validate.c:2446 > #3 0x2b3bf0f in __rte_bpf_validate ../../src/lib/bpf/bpf_validate.c:2537 > #4 0x2b19b33 in rte_bpf_load ../../src/lib/bpf/bpf_load.c:113 > #5 0x2b47d6d in bpf_load_elf ../../src/lib/bpf/bpf_load_elf.c:288 > #6 0x2b47fe8 in rte_bpf_elf_load ../../src/lib/bpf/bpf_load_elf.c:320 > #7 0x66b4b8 in test_bpf_elf_load ../../src/app/test/test_bpf.c:3382 Hmm. looks like a pre-existing BPF library bug since this code was never tested before.