From 5311fb805a4403bba024e83886fa0e7572265de4 Mon Sep 17 00:00:00 2001
From: Alexander Bulekov <alxndr@bu.edu>
Date: Fri, 26 Feb 2021 13:47:53 -0500
Subject: [PATCH] rtl8139: switch to use qemu_receive_packet() for loopback
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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
Buglink: https://bugs.launchpad.net/qemu/+bug/1910826
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/net/rtl8139.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index 4675ac878e..90b4fc63ce 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -1795,7 +1795,7 @@ static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
}
DPRINTF("+++ transmit loopback mode\n");
- rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt);
+ qemu_receive_packet(qemu_get_queue(s->nic), buf, size);
if (iov) {
g_free(buf2);
--
2.30.2