From 3c28d0dd733d8a7cf8417105fcd65d3cae226dce Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Fri, 14 May 2021 10:24:53 +0800
Subject: [PATCH] dp8393x: switch to use qemu_receive_packet() for loopback
 packet
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Fix CVE-2021-3416

This patch switches to use qemu_receive_packet() which can detect
reentrancy and return early.

This is intended to address CVE-2021-3416.

Cc: Prasad J Pandit <ppandit@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com
Signed-off-by: Jason Wang <jasowang@redhat.com>

Signed-off-by: Jiajie Li <lijiajie11@huawei.com>
---
 hw/net/dp8393x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c
index bdb0b3b2c2..a64da76bf3 100644
--- a/hw/net/dp8393x.c
+++ b/hw/net/dp8393x.c
@@ -459,7 +459,7 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
             s->regs[SONIC_TCR] |= SONIC_TCR_CRSL;
             if (nc->info->can_receive(nc)) {
                 s->loopback_packet = 1;
-                nc->info->receive(nc, s->tx_buffer, tx_len);
+                qemu_receive_packet(nc, s->tx_buffer, tx_len);
             }
         } else {
             /* Transmit packet */
-- 
2.27.0