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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/test.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/test.c')
-rw-r--r--drivers/vhost/test.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c
index 91d6f060aade..be65414d5bb1 100644
--- a/drivers/vhost/test.c
+++ b/drivers/vhost/test.c
@@ -219,13 +219,20 @@ static long vhost_test_reset_owner(struct vhost_test *n)
{
void *priv = 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_test_stop(n, &priv);
vhost_test_flush(n);
- err = vhost_dev_reset_owner(&n->dev);
+ vhost_dev_reset_owner(&n->dev, memory);
done:
mutex_unlock(&n->dev.mutex);
return err;