CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation

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Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support was vulnerable to an incorrect debug exception(#DB) error. It could occur while emulating a syscall instruction invoked from a guest.

The X86 processor stores data and program state information into various registers. One such 32-bit register is EFLAGS. It holds system status and control information into indivi...

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