[Xen-changelog] [qemu-xen stable-4.11] net: ignore packet size greater than INT_MAX

[patchbot@xxxxxxx]

commit b697c0aecbf9bc8bdb4f1bf0ea92e6a8fb258094
Author:     Jason Wang <jasowang@xxxxxxxxxx>
AuthorDate: Wed May 30 13:16:36 2018 +0800
Commit:     Anthony PERARD <anthony.perard@xxxxxxxxxx>
CommitDate: Mon Apr 1 16:03:25 2019 +0100

    net: ignore packet size greater than INT_MAX
    
    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@xxxxxxxxxx
    Reported-by: Daniel Shapira <daniel@xxxxxxxxxxxxx>
    Reviewed-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
    Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
    (cherry picked from commit 1592a9947036d60dde5404204a5d45975133caf5)
---
 net/net.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/net.c b/net/net.c
index 0719358d03..14cbb9e1ed 100644
--- a/net/net.c
+++ b/net/net.c
@@ -729,10 +729,15 @@ 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) {
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#stable-4.11

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