[PATCH v3 0/2] vhost fixes for OVS SIGSEGV in PMD

[Claudio Fontana <cfontana@suse.de>]

This is an alternative, more general fix compared with PATCH v1,
and fixes style issues in v2.

The series fixes a segmentation fault in the OVS PMD thread when
resynchronizing with QEMU after the guest application has been killed
with SIGKILL (patch 1/2),

The segmentation fault can be caused by the guest DPDK application,
which is able this way to crash the OVS process on the host,
see the backtrace in patch 1/2.

Patch 2/2 is an additional improvement in the current error handling.

---
Changes from v2: fix warnings from checkpatch.
---

Changes from v1:

* patch 1/2: instead of only fixing virtio_dev_tx_split, put the check
  for nr_vec == 0 inside desc_to_mbuf and mbuf_to_desc, so that in no
  case they attempt to read and dereference addresses from the buf_vec[]
  array when it does not contain any valid elements.

---

For your review and comments,

Claudio

Claudio Fontana (2):
  vhost: check for nr_vec == 0 in desc_to_mbuf, mbuf_to_desc
  vhost: improve error handling in desc_to_mbuf

 lib/vhost/virtio_net.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

-- 
2.26.2