Re: [PATCH bpf-next 1/2] selftests/bpf: Add reproducer for decl_tag in func_proto return type

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On 10/14/22 5:24 PM, Stanislav Fomichev wrote:
It should trigger a WARN_ON_ONCE in btf_type_id_size.

      btf_func_proto_check kernel/bpf/btf.c:4447 [inline]
      btf_check_all_types kernel/bpf/btf.c:4723 [inline]
      btf_parse_type_sec kernel/bpf/btf.c:4752 [inline]
      btf_parse kernel/bpf/btf.c:5026 [inline]
      btf_new_fd+0x1926/0x1e70 kernel/bpf/btf.c:6892
      bpf_btf_load kernel/bpf/syscall.c:4324 [inline]
      __sys_bpf+0xb7d/0x4cf0 kernel/bpf/syscall.c:5010
      __do_sys_bpf kernel/bpf/syscall.c:5069 [inline]
      __se_sys_bpf kernel/bpf/syscall.c:5067 [inline]
      __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067
      do_syscall_x64 arch/x86/entry/common.c:50 [inline]
      do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
      entry_SYSCALL_64_after_hwframe+0x63/0xcd

Cc: Yonghong Song <yhs@xxxxxx>
Cc: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxx>

Acked-by: Yonghong Song <yhs@xxxxxx>



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