xen-tools -- Unsanitised guest input in libxl device handling code

The Xen Project reports:

Various parts of libxl device-handling code inappropriately use information from (partially) guest controlled areas of xenstore.

A malicious guest administrator can cause denial of service by resource exhaustion.

A malicious guest administrator can confuse and/or deny service to management facilities.

A malicious guest administrator of a guest configured with channel devices may be able to escalate their privilege to that of the backend domain (i.e., normally, to that of the host).

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