From: Alexander Bulekov <alx...@bu.edu> 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 <ppan...@redhat.com> Cc: qemu-sta...@nongnu.org Buglink: https://bugs.launchpad.net/qemu/+bug/1917085 Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com Signed-off-by: Alexander Bulekov <alx...@bu.edu> Signed-off-by: Jason Wang <jasow...@redhat.com> --- hw/net/pcnet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/net/pcnet.c b/hw/net/pcnet.c index f3f18d8..dcd3fc4 100644 --- a/hw/net/pcnet.c +++ b/hw/net/pcnet.c @@ -1250,7 +1250,7 @@ txagain: if (BCR_SWSTYLE(s) == 1) add_crc = !GET_FIELD(tmd.status, TMDS, NOFCS); s->looptest = add_crc ? PCNET_LOOPTEST_CRC : PCNET_LOOPTEST_NOCRC; - pcnet_receive(qemu_get_queue(s->nic), s->buffer, s->xmit_pos); + qemu_receive_packet(qemu_get_queue(s->nic), s->buffer, s->xmit_pos); s->looptest = 0; } else { if (s->nic) { -- 2.7.4
