ksmbd: fix use-after-free in oplock break notification

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                        {
                            "version": "7.0.13",
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{
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                    "vendor": "Linux",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/smb/server/oplock.c"
                    ],
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                            "version": "0",
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                            "version": "7.3",
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                }