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Date: Tue, 10 Nov 2015 16:39:39 -0800 From: Venkatesh Srinivas <venkateshs@...gle.com> To: Paolo Bonzini <pbonzini@...hat.com> Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, digitaleric@...gle.com, stable@...r.kernel.org Subject: Re: [PATCH 1/3] KVM: x86: work around infinite loop in microcode when #AC is delivered On Tue, Nov 10, 2015 at 01:22:52PM +0100, Paolo Bonzini wrote: > From: Eric Northup <digitaleric@...gle.com> > > It was found that a guest can DoS a host by triggering an infinite > stream of "alignment check" (#AC) exceptions. This causes the > microcode to enter an infinite loop where the core never receives > another interrupt. The host kernel panics pretty quickly due to the > effects (CVE-2015-5307). > > Signed-off-by: Eric Northup <digitaleric@...gle.com> > Cc: stable@...r.kernel.org > Signed-off-by: Paolo Bonzini <pbonzini@...hat.com> Tested-by: Venkatesh Srinivas <venkateshs@...gle.com> -- vs; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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