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sungem: switch to use qemu_receive_packet() for loopback 

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 <ppandit@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jason Wang 2021-02-24 13:14:35 +08:00
parent 26194a58f4
commit 8c92060d3c
1 changed files with 1 additions and 1 deletions
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2
hw/net/sungem.c
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@ -306,7 +306,7 @@ static void sungem_send_packet(SunGEMState *s, const uint8_t *buf,
NetClientState *nc = qemu_get_queue(s->nic);
if (s->macregs[MAC_XIFCFG >> 2] & MAC_XIFCFG_LBCK) {
nc->info->receive(nc, buf, size);
qemu_receive_packet(nc, buf, size);
} else {
qemu_send_packet(nc, buf, size);
}