Hello,
This series fixes a few 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.
Please review and apply if appropriate,
Amit Shah (10):
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()
drivers/char/virtio_console.c | 67 ++++++++++++++++++++++++++++---------------
1 file changed, 44 insertions(+), 23 deletions(-)
--
1.8.1.4
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