cxl/features: bound fwctl command payload to the input buffer

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/cxl/core/features.c"
                    ],
                    "versions": [
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "14d52c15d5d99477b20a2d61fe36f347080da6cd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "d8957545fe96f7905791c937758ebfc1ae1e5b17",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
                            "lessThan": "f687394af983df5660b6afae7e0d06969f3af206",
                            "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/cxl/core/features.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }