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From e0b83063b76725878c466f1b8918c61864cfd0c2 Mon Sep 17 00:00:00 2001
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From: Jon Maloy <jmaloy@redhat.com>
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Date: Tue, 29 Jun 2021 03:42:44 -0400
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Subject: [PATCH 6/9] rtl8139: switch to use qemu_receive_packet() for loopback
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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Message-id: <20210629034247.3286477-7-jmaloy@redhat.com>
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Patchwork-id: 101792
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O-Subject: [RHEL-8.4.0.z qemu-kvm PATCH v2 6/9] rtl8139: switch to use qemu_receive_packet() for loopback
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Bugzilla: 1932917
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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From: Alexander Bulekov <alxndr@bu.edu>
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This patch switches to use qemu_receive_packet() which can detect
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reentrancy and return early.
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This is intended to address CVE-2021-3416.
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Cc: Prasad J Pandit <ppandit@redhat.com>
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Cc: qemu-stable@nongnu.org
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Buglink: https://bugs.launchpad.net/qemu/+bug/1910826
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Reviewed-by: Philippe Mathieu-Daudé
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Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit 5311fb805a4403bba024e83886fa0e7572265de4)
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/net/rtl8139.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
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index 21d80e96cf..ccb04faa4c 100644
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--- a/hw/net/rtl8139.c
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+++ b/hw/net/rtl8139.c
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@@ -1793,7 +1793,7 @@ static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
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}
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DPRINTF("+++ transmit loopback mode\n");
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- rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt);
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+ qemu_receive_packet(qemu_get_queue(s->nic), buf, size);
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if (iov) {
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g_free(buf2);
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--
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2.27.0
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