4.14-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Hajnoczi stefanha@redhat.com
commit a72b69dc083a931422cc8a5e33841aff7d5312f2 upstream.
The vhost_vsock->guest_cid field is uninitialized when /dev/vhost-vsock is opened until the VHOST_VSOCK_SET_GUEST_CID ioctl is called.
kvmalloc(..., GFP_KERNEL | __GFP_RETRY_MAYFAIL) does not zero memory. All other vhost_vsock fields are initialized explicitly so just initialize this field too.
Signed-off-by: Stefan Hajnoczi stefanha@redhat.com Signed-off-by: Michael S. Tsirkin mst@redhat.com Cc: Daniel Verkamp dverkamp@chromium.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/vhost/vsock.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -522,6 +522,8 @@ static int vhost_vsock_dev_open(struct i goto out; }
+ vsock->guest_cid = 0; /* no CID assigned yet */ + atomic_set(&vsock->queued_replies, 0);
vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX];