[PATCH v2 00/11] virtio: console: fixes for port unplug

[Amit Shah <amit.shah@redhat.com>]

Hello,

This series fixes a few bugs and races with port unplug and the
various file operations: read(), write(), close() and poll().

There still might be more races lurking, but testing this series looks
good to at least solve the easily-triggerable ones.  I've run the
virtio-serial testsuite and a few open/close/unplug tests, and haven't
seen any badness.

I've marked these patches for stable@ as well.  I went over the list
twice to check if really each one should go to stable, and to me it
looks like all are stable candidates.

v2
 * add patch 11: Jason found a use-after-free in port unplug
 * patch 7 introduced a regression where the wake_up_interruptible was
   done before guest_connected and host_connected were set to false

Please review and apply,

Amit Shah (11):
  virtio: console: fix race with port unplug and open/close
  virtio: console: fix race in port_fops_open() and port unplug
  virtio: console: clean up port data immediately at time of unplug
  virtio: console: return -ENODEV on all read operations after unplug
  virtio: console: update private_data in struct file only on successful
    open
  virtio: console: fix race in port_fops_poll() and port unplug
  virtio: console: fix raising SIGIO after port unplug
  virtio: console: add locks around buffer removal in port unplug path
  virtio: console: add locking in port unplug path
  virtio: console: fix locking around send_sigio_to_port()
  virtio: console: prevent use-after-free of port name in port unplug

 drivers/char/virtio_console.c | 70 +++++++++++++++++++++++++++----------------
 1 file changed, 45 insertions(+), 25 deletions(-)

-- 
1.8.1.4