KVM: s390: avoid memory leaks if __inject_vm() fails
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>
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index a6cb238..6d7513e 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -1277,6 +1277,7 @@
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 @@
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,