Patch "arm/arm64: KVM: Don't allow creating VCPUs after vgic_initialized" has been added to the 3.14-stable tree
Subsystems (2)
This is a note to let you know that I've just added the patch titled
arm/arm64: KVM: Don't allow creating VCPUs after vgic_initialized
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-arm64-kvm-don-t-allow-creating-vcpus-after-vgic_initialized.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.
Quoted 1 line
From
716139df2517fbc3f2306dbe8eba0fa88dca0189Mon Sep 17 00:00:00 2001
From: Christoffer Dall <[email protected]>
Date: Tue, 9 Dec 2014 14:33:45 +0100
Subject: arm/arm64: KVM: Don't allow creating VCPUs after vgic_initialized
From: Christoffer Dall <[email protected]>
commit 716139df2517fbc3f2306dbe8eba0fa88dca0189 upstream.
When the vgic initializes its internal state it does so based on the number of VCPUs available at the time. If we allow KVM to create more VCPUs after the VGIC has been initialized, we are likely to error out in unfortunate ways later, perform buffer overflows etc.
--- arch/arm/kvm/arm.c | 5 +++++ 1 file changed, 5 insertions(+)
arch/arm/kvm/arm.c +5 -0
@@ -220,6 +220,11 @@ struct kvm_vcpu *kvm_arch_vcpu_create(stint err;struct kvm_vcpu *vcpu; +if (irqchip_in_kernel (kvm) &&vgic_initialized (kvm)) { + err = -EBUSY ; + goto out; + } + vcpu =kmem_cache_zalloc (kvm_vcpu_cache,GFP_KERNEL );if (!vcpu) { err = -ENOMEM ;
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/arm-arm64-kvm-ensure-memslots-are-within-kvm_phys_size.patch queue-3.14/arm-arm64-kvm-don-t-clear-the-vcpu_power_off-flag.patch queue-3.14/arm-arm64-kvm-correct-kvm_arm_vcpu_init-power-off-option.patch queue-3.14/arm-arm64-kvm-don-t-allow-creating-vcpus-after-vgic_initialized.patch queue-3.14/arm-arm64-kvm-fix-potential-null-dereference-in.patch queue-3.14/arm64-kvm-fix-unmapping-with-48-bit-vas.patch queue-3.14/arm-arm64-kvm-fix-set_clear_sgi_pend_reg-offset.patch queue-3.14/arm-kvm-strict_mm_typechecks-fix-for-user_mem_abort.patch queue-3.14/arm-arm64-kvm-fix-use-of-wnr-bit-in-kvm_is_write_fault.patch queue-3.14/arm-kvm-fix-cpu-hotplug.patch queue-3.14/arm-arm64-kvm-fix-vttbr_baddr_mask-and-pgd-alloc.patch queue-3.14/arm-arm64-kvm-introduce-stage2_unmap_vm.patch queue-3.14/arm-arm64-kvm-vgic-fix-error-code-in-kvm_vgic_create.patch queue-3.14/kvm-arm-vgic-plug-irq-injection-race.patch queue-3.14/arm-arm64-kvm-reset-the-hcr-on-each-vcpu-when-resetting-the.patch