KVM: s390: Fix possible memory leak in SIGP functions
When kvm_get_vcpu() returned NULL for the destination CPU in __sigp_emergency() or __sigp_external_call(), the memory for the "inti" structure was not released anymore. This patch fixes this issue by moving the check for !dst_vcpu before the kzalloc() call. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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@ -58,7 +58,9 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
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struct kvm_s390_interrupt_info *inti;
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struct kvm_vcpu *dst_vcpu = NULL;
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if (cpu_addr >= KVM_MAX_VCPUS)
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if (cpu_addr < KVM_MAX_VCPUS)
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dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
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if (!dst_vcpu)
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return SIGP_CC_NOT_OPERATIONAL;
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inti = kzalloc(sizeof(*inti), GFP_KERNEL);
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@ -68,9 +70,6 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
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inti->type = KVM_S390_INT_EMERGENCY;
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inti->emerg.code = vcpu->vcpu_id;
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dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
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if (!dst_vcpu)
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return SIGP_CC_NOT_OPERATIONAL;
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li = &dst_vcpu->arch.local_int;
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spin_lock_bh(&li->lock);
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list_add_tail(&inti->list, &li->list);
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@ -121,7 +120,9 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
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struct kvm_s390_interrupt_info *inti;
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struct kvm_vcpu *dst_vcpu = NULL;
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if (cpu_addr >= KVM_MAX_VCPUS)
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if (cpu_addr < KVM_MAX_VCPUS)
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dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
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if (!dst_vcpu)
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return SIGP_CC_NOT_OPERATIONAL;
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inti = kzalloc(sizeof(*inti), GFP_KERNEL);
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@ -131,9 +132,6 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
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inti->type = KVM_S390_INT_EXTERNAL_CALL;
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inti->extcall.code = vcpu->vcpu_id;
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dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
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if (!dst_vcpu)
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return SIGP_CC_NOT_OPERATIONAL;
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li = &dst_vcpu->arch.local_int;
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spin_lock_bh(&li->lock);
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list_add_tail(&inti->list, &li->list);
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