drm/amdgpu/userq: fix access to stale wptr mapping

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/amd/amdgpu/mes_userqueue.c"
                    ],
                    "versions": [
                        {
                            "version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1",
                            "lessThan": "2da62dbb4169e758c0b1a9378b39a373bf4fb111",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1",
                            "lessThan": "336a9186f3a4b65bbd865d93936605ac8a1a3991",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5fb2f7fc21a3668e5794cc0d153641b9719713e1",
                            "lessThan": "6da7b1242da4455b11c24ce667d1cab1a348c8ea",
                            "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/gpu/drm/amd/amdgpu/mes_userqueue.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.9",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }