From e0b83063b76725878c466f1b8918c61864cfd0c2 Mon Sep 17 00:00:00 2001 From: Jon Maloy Date: Tue, 29 Jun 2021 03:42:44 -0400 Subject: [PATCH 6/9] rtl8139: switch to use qemu_receive_packet() for loopback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Jon Maloy Message-id: <20210629034247.3286477-7-jmaloy@redhat.com> Patchwork-id: 101792 O-Subject: [RHEL-8.4.0.z qemu-kvm PATCH v2 6/9] rtl8139: switch to use qemu_receive_packet() for loopback Bugzilla: 1932917 RH-Acked-by: Stefano Garzarella RH-Acked-by: Stefan Hajnoczi RH-Acked-by: Thomas Huth From: Alexander Bulekov 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 Buglink: https://bugs.launchpad.net/qemu/+bug/1910826 Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Jason Wang (cherry picked from commit 5311fb805a4403bba024e83886fa0e7572265de4) Signed-off-by: Jon Maloy Signed-off-by: Danilo C. L. de Paula --- 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 21d80e96cf..ccb04faa4c 100644 --- a/hw/net/rtl8139.c +++ b/hw/net/rtl8139.c @@ -1793,7 +1793,7 @@ 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); -- 2.27.0