From 725b20685e3faf11198560a6d9035c394ef77594 Mon Sep 17 00:00:00 2001
From: Xiao Wang <jasowang@redhat.com>
Date: Fri, 11 Jan 2019 07:58:59 +0000
Subject: [PATCH 04/11] net: ignore packet size greater than INT_MAX
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RH-Author: Xiao Wang <jasowang@redhat.com>
Message-id: <20190111075904.2030-5-jasowang@redhat.com>
Patchwork-id: 83978
O-Subject: [RHEL8 qemu-kvm PATCH 4/9] net: ignore packet size greater than INT_MAX
Bugzilla: 1636784
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
RH-Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>

There should not be a reason for passing a packet size greater than
INT_MAX. It's usually a hint of bug somewhere, so ignore packet size
greater than INT_MAX in qemu_deliver_packet_iov()

CC: qemu-stable@nongnu.org
Reported-by: Daniel Shapira <daniel@twistlock.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit 1592a9947036d60dde5404204a5d45975133caf5)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 net/net.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/net.c b/net/net.c
index 29f8398..c991243 100644
--- a/net/net.c
+++ b/net/net.c
@@ -712,10 +712,15 @@ ssize_t qemu_deliver_packet_iov(NetClientState *sender,
                                 void *opaque)
 {
     NetClientState *nc = opaque;
+    size_t size = iov_size(iov, iovcnt);
     int ret;
 
+    if (size > INT_MAX) {
+        return size;
+    }
+
     if (nc->link_down) {
-        return iov_size(iov, iovcnt);
+        return size;
     }
 
     if (nc->receive_disabled) {
-- 
1.8.3.1