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From c0010f9b2bafe866fe32e3c2688454bc24147136 Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Wed, 24 Feb 2021 13:27:52 +0800
Subject: [PATCH 06/10] tx_pkt: switch to use qemu_receive_packet_iov() for
loopback
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This patch switches to use qemu_receive_receive_iov() 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>
Upstream-Status: Backport [8c552542b81e56ff532dd27ec6e5328954bdda73]
CVE: CVE-2021-3416
Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
---
hw/net/net_tx_pkt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: qemu-4.2.0/hw/net/net_tx_pkt.c
===================================================================
--- qemu-4.2.0.orig/hw/net/net_tx_pkt.c
+++ qemu-4.2.0/hw/net/net_tx_pkt.c
@@ -544,7 +544,7 @@ static inline void net_tx_pkt_sendv(stru
NetClientState *nc, const struct iovec *iov, int iov_cnt)
{
if (pkt->is_loopback) {
- nc->info->receive_iov(nc, iov, iov_cnt);
+ qemu_receive_packet_iov(nc, iov, iov_cnt);
} else {
qemu_sendv_packet(nc, iov, iov_cnt);
}
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