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authorMichael S. Tsirkin <mst@redhat.com>2013-04-28 17:12:08 +0300
committerMichael S. Tsirkin <mst@redhat.com>2013-05-01 10:02:54 +0300
commit150b9e51ae975ca1fe468c565870fbc4a96e0574 (patch)
treec708d0c69807c7ac4eb14e86498536c5ec1c6c82 /drivers/vhost/net.c
parent061b16cfe3dc7a106dd29b76f6355d84464d126c (diff)
downloadlinux-150b9e51ae975ca1fe468c565870fbc4a96e0574.tar.bz2
vhost: fix error handling in RESET_OWNER ioctl
RESET_OWNER ioctl would leave the fd in a bad state if memory allocation failed: device is stopped but owner is not reset. Make state changes after allocating memory, such that a failed ioctl has no effect. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost/net.c')
-rw-r--r--drivers/vhost/net.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index e34e195b9cf6..a3645bd163d8 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -967,14 +967,20 @@ static long vhost_net_reset_owner(struct vhost_net *n)
struct socket *tx_sock = NULL;
struct socket *rx_sock = NULL;
long err;
+ struct vhost_memory *memory;
mutex_lock(&n->dev.mutex);
err = vhost_dev_check_owner(&n->dev);
if (err)
goto done;
+ memory = vhost_dev_reset_owner_prepare();
+ if (!memory) {
+ err = -ENOMEM;
+ goto done;
+ }
vhost_net_stop(n, &tx_sock, &rx_sock);
vhost_net_flush(n);
- err = vhost_dev_reset_owner(&n->dev);
+ vhost_dev_reset_owner(&n->dev, memory);
vhost_net_vq_reset(n);
done:
mutex_unlock(&n->dev.mutex);