smb: client: fix potential UAF and double free in smb2_open_file()

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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                        "fs/smb/client/smb2file.c"
                    ],
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                        {
                            "version": "7.0",
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                            "versionType": "original_commit_for_fix"
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                }