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kvm tools: arm: don't crash when no compatible CPU is found

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If the kernel against which kvm tools was compiled supports more
CPU types than kvm tools does, then we can hit a situation where
we dereference an empty target slot.

Just stepping over empty slots fixes the issue.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Marc Zyngier
2013-04-11 17:36:22 +01:00
committed by Will Deacon
parent 6585ffb707
commit 8d0413d2a0
1 changed files with 2 additions and 0 deletions
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arm/kvm-cpu.c
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@@ -56,6 +56,8 @@ struct kvm_cpu *kvm_cpu__arch_init(struct kvm *kvm, unsigned long cpu_id)
/* Find an appropriate target CPU type. */
for (i = 0; i < ARRAY_SIZE(kvm_arm_targets); ++i) {
if (!kvm_arm_targets[i])
continue;
vcpu_init.target = kvm_arm_targets[i]->id;
err = ioctl(vcpu->vcpu_fd, KVM_ARM_VCPU_INIT, &vcpu_init);
if (!err)