forked from luck/tmp_suning_uos_patched
KVM: fix irq_source_id size verification
find_first_zero_bit works with bit numbers, not bytes. Fixes https://sourceforge.net/tracker/?func=detail&aid=2847560&group_id=180599&atid=893831 Reported-by: "Xu, Jiajun" <jiajun.xu@intel.com> Cc: stable@kernel.org Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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@ -215,10 +215,9 @@ int kvm_request_irq_source_id(struct kvm *kvm)
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int irq_source_id;
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mutex_lock(&kvm->irq_lock);
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irq_source_id = find_first_zero_bit(bitmap,
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sizeof(kvm->arch.irq_sources_bitmap));
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irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG);
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if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) {
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if (irq_source_id >= BITS_PER_LONG) {
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printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n");
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irq_source_id = -EFAULT;
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goto unlock;
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@ -240,7 +239,7 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
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mutex_lock(&kvm->irq_lock);
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if (irq_source_id < 0 ||
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irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) {
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irq_source_id >= BITS_PER_LONG) {
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printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
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goto unlock;
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}
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