From 827610834ff2a32522c73bee48984fff5521c389 Mon Sep 17 00:00:00 2001 From: Alexander Bulekov Date: Fri, 14 May 2021 10:41:41 +0800 Subject: [PATCH] lan9118: switch to use qemu_receive_packet() for loopback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Cc: qemu-stable@nongnu.org Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Jason Wang Signed-off-by: Jiajie Li --- hw/net/lan9118.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c index f6120be219..f1a1d2351e 100644 --- a/hw/net/lan9118.c +++ b/hw/net/lan9118.c @@ -662,7 +662,7 @@ static void do_tx_packet(lan9118_state *s) /* FIXME: Honor TX disable, and allow queueing of packets. */ if (s->phy_control & 0x4000) { /* This assumes the receive routine doesn't touch the VLANClient. */ - lan9118_receive(qemu_get_queue(s->nic), s->txp->data, s->txp->len); + qemu_receive_packet(qemu_get_queue(s->nic), s->txp->data, s->txp->len); } else { qemu_send_packet(qemu_get_queue(s->nic), s->txp->data, s->txp->len); } -- 2.27.0