[Qemu-stable] [PATCH 48/97] net: ignore packet size greater than INT_MAX

[Michael Roth]

From: Jason Wang <address@hidden>

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: address@hidden
Reported-by: Daniel Shapira <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
(cherry picked from commit 1592a9947036d60dde5404204a5d45975133caf5)
Signed-off-by: Michael Roth <address@hidden>
---
 net/net.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/net.c b/net/net.c
index 2a3133990c..46db72811b 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) {
-- 
2.17.1