releases/4.9.96/iommu-vt-d-fix-a-potential-memory-leak.patch

From bbe4b3af9d9e3172fb9aa1f8dcdfaedcb381fc64 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Sat, 24 Feb 2018 13:42:27 +0800
Subject: iommu/vt-d: Fix a potential memory leak

From: Lu Baolu <baolu.lu@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.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.4+
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Fixes: 2f26e0a9c9860 ('iommu/vt-d: Add basic SVM PASID support')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@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;