diff options
| author |   Damjan Marion <damarion@cisco.com> | 2016-01-12 18:34:24 +0100 |
|---|---|---|
| committer | Damjan Marion <damarion@cisco.com> | 2016-01-12 18:38:11 +0100 |
| commit | 920ecc2e1ff2f1bdbd3698243cd1804b4bc2e269 (patch) | |
| tree | 9be280ae7ef793721ab6beb8ef64b53a3993e637 /vnet/vnet/devices/virtio/vhost-user.c | |
| parent | 3b566bb613ff918e5a016a190cb2efcfdea02f5f (diff) | |
Avoid crash in vhost-user driver when running multithreaded
Change-Id: Ib54575453fd26ba1a7256e9d583c8f8532613ebc
Signed-off-by: Carsten Koester <ckoester@cisco.com>
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'vnet/vnet/devices/virtio/vhost-user.c')
| -rw-r--r-- | vnet/vnet/devices/virtio/vhost-user.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/vnet/vnet/devices/virtio/vhost-user.c b/vnet/vnet/devices/virtio/vhost-user.c index 20a4c021c6a..8dca33b82af 100644 --- a/vnet/vnet/devices/virtio/vhost-user.c +++ b/vnet/vnet/devices/virtio/vhost-user.c @@ -771,6 +771,9 @@ static u32 vhost_user_if_input ( vlib_main_t * vm, if (PREDICT_FALSE(!txvq->desc)) return 0; + if (PREDICT_FALSE(!txvq->avail)) + return 0; + /* do we have pending intterupts ? */ if ((txvq->n_since_last_int) && (txvq->int_deadline < now)) vhost_user_send_call(vm, txvq); @@ -1037,6 +1040,9 @@ vhost_user_intfc_tx (vlib_main_t * vm, if (PREDICT_FALSE(!rxvq->desc)) goto done2; + if (PREDICT_FALSE(!rxvq->avail)) + goto done2; + if (PREDICT_FALSE(vui->lockp != 0)) { while (__sync_lock_test_and_set (vui->lockp, 1)) |