From 3abb574bc7328eab1f67a1e470ea44c595b0c0b5 Mon Sep 17 00:00:00 2001
From: Xiao Wang <jasowang@redhat.com>
Date: Fri, 17 May 2019 07:29:36 +0200
Subject: [PATCH 2/9] net: ignore packet size greater than INT_MAX

RH-Author: Xiao Wang <jasowang@redhat.com>
Message-id: <1558078177-372-3-git-send-email-jasowang@redhat.com>
Patchwork-id: 88014
O-Subject: [RHEL7.7 qemu-kvm-rhev PATCH 2/3] net: ignore packet size greater than INT_MAX
Bugzilla: 1636780
RH-Acked-by: Thomas Huth <thuth@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>

Bugzilla: 1636779

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: Miroslav Rezanina <mrezanin@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