md/md-bitmap: fix GPF in bitmap_get_stats()

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/md/md-bitmap.c"
                    ],
                    "versions": [
                        {
                            "version": "065f4b1cd41d03702426af44193894b925607073",
                            "lessThan": "a23b16ba3274961494f5ad236345d238364349ff",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0b5390aeaa85eb2f15e0e2ea0731c0995285db5e",
                            "lessThan": "3d82a729530bd2110ba66e4a1f73461c776edec2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eeeba7f43ae27835718a5f5ad6552a8983e75201",
                            "lessThan": "3e0542701b37aa25b025d8531583458e4f014c2e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6ec1f0239485028445d213d91cfee5242f3211ba",
                            "lessThan": "a18f9b08c70e10ea3a897058fee8a4f3b4c146ec",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6ec1f0239485028445d213d91cfee5242f3211ba",
                            "lessThan": "c17fb542dbd1db745c9feac15617056506dd7195",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "896a6fbefc9050cf940ed57947eda6dc23aa58b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.1.135",
                            "lessThan": "6.1.146",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.88",
                            "lessThan": "6.6.99",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.25",
                            "lessThan": "6.12.39",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14.4",
                            "lessThan": "6.15",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/md/md-bitmap.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.146",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.99",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.39",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.7",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }