net/handshake: Take a long-lived file reference at submit

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/handshake/handshake.h",
                        "net/handshake/netlink.c",
                        "net/handshake/request.c"
                    ],
                    "versions": [
                        {
                            "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
                            "lessThan": "22e371a93563c30ebebc576db049785e0d7fc617",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
                            "lessThan": "685b10dd0e32c7782cead16c8cf055c609678583",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
                            "lessThan": "b913801ad9b9a51437d84d030ec6843e08976bd6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
                            "lessThan": "16eaba5aa89c04eea125905bb8f988c1897f4f29",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
                            "lessThan": "09dba37eee70d0596e26645015f1aa95a9848e9d",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/handshake/handshake.h",
                        "net/handshake/netlink.c",
                        "net/handshake/request.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.93",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.12",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }