File 0224-dp8393x-switch-to-use-qemu_receive_.patch of Package qemu.18973

From: Jason Wang <jasowang@redhat.com>
Date: Wed, 24 Feb 2021 12:57:40 +0800
Subject: dp8393x: switch to use qemu_receive_packet() for loopback packet
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Git-commit: 331d2ac9ea307c990dc86e6493e8f0c48d14bb33

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: Bruce Rogers <brogers@suse.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 f2d2ce344cc9db69c60d38b1a23b..bcfc5e1afddc9c02928d6921aa0d 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 */