drm/xe/userptr: Hold notifier_lock for write on inject test path

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/xe/xe_pt.c",
                        "drivers/gpu/drm/xe/xe_svm.h"
                    ],
                    "versions": [
                        {
                            "version": "9e978741488261e117bb50e5dfcf8e4080990958",
                            "lessThan": "f9a9abd7bbdab3dfe1b1155e1457dc02b5e14ea5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9e978741488261e117bb50e5dfcf8e4080990958",
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                        {
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                            "status": "affected",
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                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/xe/xe_pt.c",
                        "drivers/gpu/drm/xe/xe_svm.h"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }