ext4: check dot and dotdot of dx_root before making dir indexed

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/namei.c"
                    ],
                    "versions": [
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "b80575ffa98b5bb3a5d4d392bfe4c2e03e9557db",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "19e13b4d7f0303186fcc891aba8d0de7c8fdbda8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "42d420517072028fb0eb852c358056b7717ba5aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "8afe06ed3be7a874b3cd82ef5f8959aca8d6429a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "abb411ac991810c0bcbe51c2e76d2502bf611b5c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "9d241b7a39af192d1bb422714a458982c7cc67a2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "cdd345321699042ece4a9d2e70754d2397d378c5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ac27a0ec112a089f1a5102bc8dffc79c8c815571",
                            "lessThan": "50ea741def587a64e08879ce6c6a30131f7111e7",
                            "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/ext4/namei.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.320",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.282",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.224",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.165",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.103",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.44",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.10.3",
                            "lessThanOrEqual": "6.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.11",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }