From: Paolo Bonzini Date: Fri, 28 Mar 2014 19:41:50 +0000 (+0100) Subject: KVM: ioapic: fix assignment of ioapic->rtc_status.pending_eoi (CVE-2014-0155) X-Git-Tag: omap-for-v3.16/pm-signed~107^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5678de3f15010b9022ee45673f33bcfc71d47b60;p=pandora-kernel.git KVM: ioapic: fix assignment of ioapic->rtc_status.pending_eoi (CVE-2014-0155) QE reported that they got the BUG_ON in ioapic_service to trigger. I cannot reproduce it, but there are two reasons why this could happen. The less likely but also easiest one, is when kvm_irq_delivery_to_apic does not deliver to any APIC and returns -1. Because irqe.shorthand == 0, the kvm_for_each_vcpu loop in that function is never reached. However, you can target the similar loop in kvm_irq_delivery_to_apic_fast; just program a zero logical destination address into the IOAPIC, or an out-of-range physical destination address. Signed-off-by: Paolo Bonzini --- Reading git-diff-tree failed