Re: [PATCH v4 3/5] bpf: add a test for BPF ELF load

[Stephen Hemminger <stephen@networkplumber.org>]

On Fri, 7 Nov 2025 17:45:51 +0000
Marat Khalili <marat.khalili@huawei.com> 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.