block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/bfq-iosched.c"
                    ],
                    "versions": [
                        {
                            "version": "5533742c7cb1bc9b1f0bf401cc397d44a3a9e07a",
                            "lessThan": "1425f1bb5df5239021fd09ebc2a5e8070e705d36",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "094f3d9314d67691cb21ba091c1b528f6e3c4893",
                            "lessThan": "7949b0df3dd9f4817ed4a4e989fa9ee81df6205f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b22fd72bfebda3956efc4431b60ddfc0a51e03e0",
                            "lessThan": "cfe5b38c37720313eff0dec5517442c7ab3c9a20",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "761564d93c8265f65543acf0a576b32d66bfa26a",
                            "lessThan": "1ed959fef5b1c6f1a7a3fbea543698c30ebd6678",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64dc8c732f5c2b406cc752e6aaa1bd5471159cab",
                            "lessThan": "246cf66e300b76099b5dbd3fdd39e9a5dbc53f02",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "block/bfq-iosched.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15.86",
                            "lessThan": "5.15.87",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.16",
                            "lessThan": "6.0.17",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.2",
                            "lessThan": "6.1.3",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }