File 0377-rtl8139-switch-to-use-qemu_receive_.patch of Package qemu.19799

From: Alexander Bulekov <alxndr@bu.edu>
Date: Fri, 26 Feb 2021 13:47:53 -0500
Subject: rtl8139: switch to use qemu_receive_packet() for loopback
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Git-commit: 5311fb805a4403bba024e83886fa0e7572265de4
References: bsc#1182968, 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
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>
Signed-off-by: Bruce Rogers <brogers@suse.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 333582979b816a92a2b865ccf339..8ae0f662e9d3742be29c44105a12 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -1808,7 +1808,7 @@ 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);