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| author | Yunjian Wang <wangyunjian@huawei.com> | 2017-04-26 14:45:56 +0800 |
|---|---|---|
| committer | Jason Wang <jasowang@redhat.com> | 2017-05-23 10:10:38 +0800 |
| commit | f989c30cf834ba8625e98b808eac30e4e7ec5008 (patch) | |
| tree | f9a8debf2839b06da475bdf72993dd13304c763b /hw/net | |
| parent | f5ab20a4682959f06efe0787950a6c48a3e6f8fa (diff) | |
| download | qemu-f989c30cf834ba8625e98b808eac30e4e7ec5008.zip qemu-f989c30cf834ba8625e98b808eac30e4e7ec5008.tar.gz qemu-f989c30cf834ba8625e98b808eac30e4e7ec5008.tar.bz2 | |
virtio-net: fix wild pointer when remove virtio-net queues
The tx_bh or tx_timer will free in virtio_net_del_queue() function, when
removing virtio-net queues if the guest doesn't support multiqueue. But
it might be still referenced by virtio_net_set_status(), which needs to
be set NULL. And also the tx_waiting needs to be set zero to prevent
virtio_net_set_status() accessing tx_bh or tx_timer.
Cc: qemu-stable@nongnu.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'hw/net')
| -rw-r--r-- | hw/net/virtio-net.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 7d091c9..98bd683 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -1522,9 +1522,12 @@ static void virtio_net_del_queue(VirtIONet *n, int index) if (q->tx_timer) { timer_del(q->tx_timer); timer_free(q->tx_timer); + q->tx_timer = NULL; } else { qemu_bh_delete(q->tx_bh); + q->tx_bh = NULL; } + q->tx_waiting = 0; virtio_del_queue(vdev, index * 2 + 1); } |