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KVM: s390: avoid memory leaks if __inject_vm() fails

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We have to delete the allocated interrupt info if __inject_vm() fails.

Otherwise user space can keep flooding kvm with floating interrupts and
provoke more and more memory leaks.

Reported-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2015-01-16 12:58:09 +01:00 committed by Christian Borntraeger
parent a374e892c3
commit 428d53be5e
1 changed files with 5 additions and 1 deletions
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6
arch/s390/kvm/interrupt.c
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@ -1277,6 +1277,7 @@ int kvm_s390_inject_vm(struct kvm *kvm,
struct kvm_s390_interrupt *s390int)
{
struct kvm_s390_interrupt_info *inti;
int rc;
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
if (!inti)
@ -1324,7 +1325,10 @@ int kvm_s390_inject_vm(struct kvm *kvm,
trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
2);
return __inject_vm(kvm, inti);
rc = __inject_vm(kvm, inti);
if (rc)
kfree(inti);
return rc;
}
void kvm_s390_reinject_io_int(struct kvm *kvm,