diff options
| author | Amit Shah <amit.shah@redhat.com> | 2010-05-27 13:24:39 +0530 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-06-03 22:39:18 +0930 |
| commit | 0047634d3daebca9e99a22eb89167bf77f35cdfa (patch) | |
| tree | f3331e990777369228ea8a68b81cecd773e6157c | |
| parent | a5b365a652206ca300256974ed9301a7d241a6ed (diff) | |
virtio: console: Fix crash when hot-unplugging a port and read is blocked
When removing a port we don't check if a program was blocked for read.
This leads to a crash when SIGTERM is sent to the program after
hot-unplugging the port.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| -rw-r--r-- | drivers/char/virtio_console.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 8c99bf1b5e9..e3fb5296cf2 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1099,6 +1099,13 @@ static int remove_port(struct port *port) { struct port_buffer *buf; + if (port->guest_connected) { + port->guest_connected = false; + port->host_connected = false; + wake_up_interruptible(&port->waitqueue); + send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 0); + } + spin_lock_irq(&port->portdev->ports_lock); list_del(&port->list); spin_unlock_irq(&port->portdev->ports_lock); @@ -1120,9 +1127,6 @@ static int remove_port(struct port *port) hvc_remove(port->cons.hvc); #endif } - if (port->guest_connected) - send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 0); - sysfs_remove_group(&port->dev->kobj, &port_attribute_group); device_destroy(pdrvdata.class, port->dev->devt); cdev_del(&port->cdev); |