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authorJeff Dike <jdike@addtoit.com>2010-03-04 16:10:14 -0500
committerMichael S. Tsirkin <mst@redhat.com>2010-03-07 13:28:53 +0200
commit1dace8c801ac531022bd31a7316a6b4351837617 (patch)
tree4a2edd69b3fb495a5eaaf7426e8a49ad5a56f990 /drivers/vhost
parent39286fa41a8b2c6a9c1f656a7b3c3efca95bc1b9 (diff)
vhost: fix error path in vhost_net_set_backend
An error could cause vhost_net_set_backend to exit without unlocking vq->mutex. Fix this. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost')
-rw-r--r--drivers/vhost/net.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index ad37da2b6cb..fcafb6b170f 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -508,12 +508,12 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
/* Verify that ring has been setup correctly. */
if (!vhost_vq_access_ok(vq)) {
r = -EFAULT;
- goto err;
+ goto err_vq;
}
sock = get_socket(fd);
if (IS_ERR(sock)) {
r = PTR_ERR(sock);
- goto err;
+ goto err_vq;
}
/* start polling new socket */
@@ -524,12 +524,14 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
- mutex_unlock(&vq->mutex);
done:
if (oldsock) {
vhost_net_flush_vq(n, index);
fput(oldsock->file);
}
+
+err_vq:
+ mutex_unlock(&vq->mutex);
err:
mutex_unlock(&n->dev.mutex);
return r;