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| author | Jason Wang <jasowang@redhat.com> | 2013-01-28 01:05:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-29 15:43:03 -0500 |
| commit | 692a998b908ae4c612d95d1f5f5adae03eca2b79 (patch) | |
| tree | c25929f71faec4963eafa1cfbeb992bee6cd4720 /drivers | |
| parent | af668b3c276d0f958a3aa46ef8ec47e2d5d333b3 (diff) | |
| download | linux-stable-692a998b908ae4c612d95d1f5f5adae03eca2b79.tar.gz linux-stable-692a998b908ae4c612d95d1f5f5adae03eca2b79.tar.bz2 linux-stable-692a998b908ae4c612d95d1f5f5adae03eca2b79.zip | |
vhost_net: correct error handling in vhost_net_set_backend()
Currently, when vhost_init_used() fails the sock refcnt and ubufs were
leaked. Correct this by calling vhost_init_used() before assign ubufs and
restore the oldsock when it fails.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vhost/net.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index ebd08b21b234..d10ad6f8df7e 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -827,15 +827,16 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) r = PTR_ERR(ubufs); goto err_ubufs; } - oldubufs = vq->ubufs; - vq->ubufs = ubufs; + vhost_net_disable_vq(n, vq); rcu_assign_pointer(vq->private_data, sock); - vhost_net_enable_vq(n, vq); - r = vhost_init_used(vq); if (r) - goto err_vq; + goto err_used; + vhost_net_enable_vq(n, vq); + + oldubufs = vq->ubufs; + vq->ubufs = ubufs; n->tx_packets = 0; n->tx_zcopy_err = 0; @@ -859,6 +860,11 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) mutex_unlock(&n->dev.mutex); return 0; +err_used: + rcu_assign_pointer(vq->private_data, oldsock); + vhost_net_enable_vq(n, vq); + if (ubufs) + vhost_ubuf_put_and_wait(ubufs); err_ubufs: fput(sock->file); err_vq: |