KVM: Fix pit memory leak if unable to allocate irq source id

Reported-By: Daniel Marjamäki <danielm77@spray.se>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 8772dc94682..59ebd37ad79 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -548,8 +548,10 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm)
         mutex_lock(&kvm->lock);
         pit->irq_source_id = kvm_request_irq_source_id(kvm);
         mutex_unlock(&kvm->lock);
-        if (pit->irq_source_id < 0)
+        if (pit->irq_source_id < 0) {
+                kfree(pit);
                 return NULL;
+        }
 
         mutex_init(&pit->pit_state.lock);
         mutex_lock(&pit->pit_state.lock);