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
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