[PATCH 4.4 036/192] [PATCH 037/135] Drivers: hv: util: catch allocation errors

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit cdc0c0c94e4e6dfa371d497a3130f83349b6ead6 ]

Catch allocation errors in hvutil_transport_send.

Fixes: 14b50f80c32d ('Drivers: hv: util: introduce hv_utils_transport 
abstraction')

Signed-off-by: Olaf Hering <o...@aepfle.de>
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/hv/hv_utils_transport.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/hv/hv_utils_transport.c
+++ b/drivers/hv/hv_utils_transport.c
@@ -204,9 +204,12 @@ int hvutil_transport_send(struct hvutil_
                goto out_unlock;
        }
        hvt->outmsg = kzalloc(len, GFP_KERNEL);
-       memcpy(hvt->outmsg, msg, len);
-       hvt->outmsg_len = len;
-       wake_up_interruptible(&hvt->outmsg_q);
+       if (hvt->outmsg) {
+               memcpy(hvt->outmsg, msg, len);
+               hvt->outmsg_len = len;
+               wake_up_interruptible(&hvt->outmsg_q);
+       } else
+               ret = -ENOMEM;
 out_unlock:
        mutex_unlock(&hvt->outmsg_lock);
        return ret;