[PATCH 4.9 49/95] iommu/vt-d: Fix a potential memory leak

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lu Baolu <baolu...@linux.intel.com>

commit bbe4b3af9d9e3172fb9aa1f8dcdfaedcb381fc64 upstream.

A memory block was allocated in intel_svm_bind_mm() but never freed
in a failure path. This patch fixes this by free it to avoid memory
leakage.

Cc: Ashok Raj <ashok....@intel.com>
Cc: Jacob Pan <jacob.jun....@linux.intel.com>
Cc: <sta...@vger.kernel.org> # v4.4+
Signed-off-by: Lu Baolu <baolu...@linux.intel.com>
Fixes: 2f26e0a9c9860 ('iommu/vt-d: Add basic SVM PASID support')
Signed-off-by: Joerg Roedel <jroe...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/iommu/intel-svm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -389,6 +389,7 @@ int intel_svm_bind_mm(struct device *dev
                                pasid_max - 1, GFP_KERNEL);
                if (ret < 0) {
                        kfree(svm);
+                       kfree(sdev);
                        goto out;
                }
                svm->pasid = ret;