OpenE2K/qemu-e2k
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virtio-net: only delete bh that existed

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We delete without check whether it existed during exit. This will lead NULL
pointer deference since it was created conditionally depends on guest driver
status and features. So add a check of existence before trying to delete it.

Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 1383728288-28469-1-git-send-email-jasowang@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
This commit is contained in:
Jason Wang 2013-11-06 16:58:08 +08:00 committed by Anthony Liguori
parent c2d3066776
commit fe2dafa02d
1 changed files with 1 additions and 1 deletions
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2
hw/net/virtio-net.c
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@ -1601,7 +1601,7 @@ static int virtio_net_device_exit(DeviceState *qdev)
if (q->tx_timer) {
timer_del(q->tx_timer);
timer_free(q->tx_timer);
} else {
} else if (q->tx_bh) {
qemu_bh_delete(q->tx_bh);
}
}