bf947f8 3 security issues (#2180425)

Authored and Committed by myoung a year ago
    3 security issues (#2180425)
    
    x86 shadow plus log-dirty mode use-after-free [XSA-427, CVE-2022-42332]
    x86/HVM pinned cache attributes mis-handling [XSA-428, CVE-2022-42333,
    	CVE-2022-42334]
    x86: speculative vulnerability in 32bit SYSCALL path [XSA-429,
    	CVE-2022-42331]
    
        
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