media: s2255: check firmware size before reading trailing marker

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/media/usb/s2255/s2255drv.c"
                    ],
                    "versions": [
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "6f6a5b0b0a84c2de0e152f2841e57bc226db924f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "8eca0f85eeb0789be40e637bcf9a21c4265b6c6f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "ffc27411ea60b8a09f1fea3d664b65210fdeb454",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "5626785b0e4665326e4d96736c106161da09b2f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "3e03f1209c1c8a45a7bc559f4ecd79d9b33f706d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "342632a4d8ba3fafc1556deee0b7a48dd7860336",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "7d221859ba45d7228d0138c9a3e55bd3bb31e14e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "14d962602c8bf86e63c9b9272be1f0360d0a448a",
                            "lessThan": "330f2936ab768c7215322a476f033143e8891d28",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/media/usb/s2255/s2255drv.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.28",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.28",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.51",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.5",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }