releases/4.4.129/iommu-vt-d-fix-a-potential-memory-leak.patch

   1 From bbe4b3af9d9e3172fb9aa1f8dcdfaedcb381fc64 Mon Sep 17 00:00:00 2001
   2 From: Lu Baolu <baolu.lu@linux.intel.com>
   3 Date: Sat, 24 Feb 2018 13:42:27 +0800
   4 Subject: iommu/vt-d: Fix a potential memory leak
   5
   6 From: Lu Baolu <baolu.lu@linux.intel.com>
   7
   8 commit bbe4b3af9d9e3172fb9aa1f8dcdfaedcb381fc64 upstream.
   9
  10 A memory block was allocated in intel_svm_bind_mm() but never freed
  11 in a failure path. This patch fixes this by free it to avoid memory
  12 leakage.
  13
  14 Cc: Ashok Raj <ashok.raj@intel.com>
  15 Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
  16 Cc: <stable@vger.kernel.org> # v4.4+
  17 Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
  18 Fixes: 2f26e0a9c9860 ('iommu/vt-d: Add basic SVM PASID support')
  19 Signed-off-by: Joerg Roedel <jroedel@suse.de>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  21
  22 ---
  23  drivers/iommu/intel-svm.c |    1 +
  24  1 file changed, 1 insertion(+)
  25
  26 --- a/drivers/iommu/intel-svm.c
  27 +++ b/drivers/iommu/intel-svm.c
  28 @@ -389,6 +389,7 @@ int intel_svm_bind_mm(struct device *dev
  29                                 pasid_max - 1, GFP_KERNEL);
  30                 if (ret < 0) {
  31                         kfree(svm);
  32 +                       kfree(sdev);
  33                         goto out;
  34                 }
  35                 svm->pasid = ret;