Bluetooth: virtio_bt: avoid OOB read of build info string

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/bluetooth/virtio_bt.c"
                    ],
                    "versions": [
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "d08c99abf06133a7829d46627e77e3315ca974d2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "0e388d805233a883a31271676eae6031dfc9e898",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "54e9387eb7546eaa6f600220599d55740956ffc3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "be1e3df2c49c91b0a052c6563884e8d39bd768b2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "84ea9c99874804f5ca13f35bbc186ba93902f30f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
                            "lessThan": "502adc06ba76dee19c292ae4a07d74d202fe734d",
                            "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/bluetooth/virtio_bt.c"
                    ],
                    "versions": [
                        {
                            "version": "5.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.13",
                            "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": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }