linux-kernel - [PATCH v3 0/2] vhost-vdpa mapping error path fixes

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Date:   Sat,  3 Oct 2020 01:02:08 -0400
From:   Si-Wei Liu <si-wei.liu@...cle.com>
To:     mst@...hat.com, jasowang@...hat.com, lingshan.zhu@...el.com
Cc:     joao.m.martins@...cle.com, boris.ostrovsky@...cle.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [PATCH v3 0/2] vhost-vdpa mapping error path fixes

Commit 4c8cf31885f6 ("vhost: introduce vDPA-based backend")
has following issues in the failure path of IOTLB update:

1) vhost_vdpa_map() does not clean up dangling iotlb entry
   upon mapping failure

2) vhost_vdpa_process_iotlb_update() has leakage of pinned
   pages in case of vhost_vdpa_map() failure

This patchset attempts to address the above issues.

Changes in v3:
- Factor out changes in vhost_vdpa_map() and the fix for
  page pinning leak to separate patches (Jason)

---
Si-Wei Liu (2):
  vhost-vdpa: fix vhost_vdpa_map() on error condition
  vhost-vdpa: fix page pinning leakage in error path

 drivers/vhost/vdpa.c | 122 +++++++++++++++++++++++++++++++--------------------
 1 file changed, 74 insertions(+), 48 deletions(-)

-- 
1.8.3.1