net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sctp/sm_statefuns.c"
                    ],
                    "versions": [
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "1014b83778c8677f1d7a57c26dc728baa801ac62",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "7f702f85df0266ed7b5bab81ba50394c92f3c928",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "dbceedc0213e75bf3e9f9f9e2f66b10699d004fe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "025419f4e216a3ae0d0cec622262e98e8078c447",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "c21f45cfa4a9526b34d76b397c9ef080668b6e73",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "d0e8f1445c19b1786759ba72a38267e1449bab7e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "badbd79313e6591616c1b78e29a9b71efed7f035",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b",
                            "lessThan": "2f3119686ef50319490ccaec81a575973da98815",
                            "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/sctp/sm_statefuns.c"
                    ],
                    "versions": [
                        {
                            "version": "4.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.301",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.246",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.195",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.157",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.113",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.54",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.4",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }