[PATCH] KVM: fix possible coalesced_mmio_ring page leaks.

[Xiubo Li]

It forgets to free coalesced_mmio_ring page after the anon_inode_getfd
fails.

Signed-off-by: Xiubo Li <lixi...@cmss.chinamobile.com>
---
 virt/kvm/kvm_main.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8579f18..85e8106 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2784,16 +2784,22 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
                return PTR_ERR(kvm);
 #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
        r = kvm_coalesced_mmio_init(kvm);
-       if (r < 0) {
-               kvm_put_kvm(kvm);
-               return r;
-       }
+       if (r < 0)
+               goto out_put_kvm;
 #endif
        r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR | O_CLOEXEC);
        if (r < 0)
-               kvm_put_kvm(kvm);
+               goto out_mmio_free;
 
        return r;
+
+out_mmio_free:
+#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
+       kvm_coalesced_mmio_free(kvm);
+#endif
+out_put_kvm:
+       kvm_put_kvm(kvm);
+       return r;
 }
 
 static long kvm_dev_ioctl(struct file *filp,
-- 
1.9.1



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