4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Stefan Hajnoczi <stefa...@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 <stefa...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
Cc: Daniel Verkamp <dverk...@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index c9de9c41aa97..5a5e981bd8e4 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -518,6 +518,8 @@ static int vhost_vsock_dev_open(struct inode *inode, struct
file *file)
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];
