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dp8393x: switch to use qemu_receive_packet() for loopback packet 

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: Philippe Mathieu-Daudé <philmd@redhat.com
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jason Wang 2021-02-24 12:57:40 +08:00
parent 1caff0340f
commit 331d2ac9ea
1 changed files with 1 additions and 1 deletions
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2
hw/net/dp8393x.c
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@ -506,7 +506,7 @@ static void dp8393x_do_transmit_packets(dp8393xState *s)
s->regs[SONIC_TCR] |= SONIC_TCR_CRSL;
if (nc->info->can_receive(nc)) {
s->loopback_packet = 1;
nc->info->receive(nc, s->tx_buffer, tx_len);
qemu_receive_packet(nc, s->tx_buffer, tx_len);
}
} else {
/* Transmit packet */