ksmbd: safely drain sessions during logoff

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/connection.c",
                        "fs/smb/server/mgmt/user_session.c",
                        "fs/smb/server/mgmt/user_session.h",
                        "fs/smb/server/smb2pdu.c",
                        "fs/smb/server/vfs_cache.c",
                        "fs/smb/server/vfs_cache.h"
                    ],
                    "versions": [
                        {
                            "version": "76e98a158b207771a6c9a0de0a60522a446a3447",
                            "lessThan": "a7e6df0bb92642bee4431b2b85c69ada1e463b21",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "76e98a158b207771a6c9a0de0a60522a446a3447",
                            "lessThan": "d12168084c8c1b6d883c8eca5853929ac5136a9e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "118fd997612d1efc94a86c307c6c6d659ebe29fc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c1e55020534c4aafbc38d8f5c4583ff30755ac18",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.6.48",
                            "lessThan": "6.7",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.10.7",
                            "lessThan": "6.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/connection.c",
                        "fs/smb/server/mgmt/user_session.c",
                        "fs/smb/server/mgmt/user_session.h",
                        "fs/smb/server/smb2pdu.c",
                        "fs/smb/server/vfs_cache.c",
                        "fs/smb/server/vfs_cache.h"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }