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  • Forked from hardware-enablement / Rockchip upstream enablement efforts / linux
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    Yonghong Song authored and Daniel Borkmann committed
    Commit 2993e051 ("tools/bpf: add support to read .BTF.ext sections")
    added support to read .BTF.ext sections from an object file, create
    and pass prog_btf_fd and func_info to the kernel.
    
    The program btf_fd (prog->btf_fd) is initialized to be -1 to please
    zclose so we do not need special handling dur prog close.
    Passing -1 to the kernel, however, will cause loading error.
    Passing btf_fd 0 to the kernel if prog->btf_fd is invalid
    fixed the problem.
    
    Fixes: 2993e051 ("tools/bpf: add support to read .BTF.ext sections")
    Reported-by: default avatarAndrey Ignatov <rdna@fb.com>
    Reported-by: default avatarEmre Cantimur <haydum@fb.com>
    Tested-by: default avatarAndrey Ignatov <rdna@fb.com>
    Signed-off-by: default avatarYonghong Song <yhs@fb.com>
    Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
    Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
    462c124c
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