bpf, x86: fix freeing of not-finalized bpf_prog_pack

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                        "arch/x86/net/bpf_jit_comp.c",
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{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/net/bpf_jit_comp.c",
                        "include/linux/bpf.h",
                        "include/linux/filter.h",
                        "kernel/bpf/core.c"
                    ],
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                        {
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