cifs: parse_dfs_referrals: prevent oob on malformed input

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/misc.c"
                    ],
                    "versions": [
                        {
                            "version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
                            "lessThan": "cfacc7441f760e4a73cc71b6ff1635261d534657",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
                            "lessThan": "15c73964da9df994302f579ed14ee5fdbce7a332",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
                            "lessThan": "8bc4a8d39bac23d8b044fd3e2dbfd965f1d9b058",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
                            "lessThan": "bb0f2e66e1ac043a5b238f5bcab4f26f3c317039",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
                            "lessThan": "6447b0e355562a1ff748c4a2ffb89aae7e84d2c9",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/client/misc.c"
                    ],
                    "versions": [
                        {
                            "version": "4.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.158",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.114",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.55",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.5",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }