[V4,05/10] sungem: switch to use qemu_receive_packet() for loopback

Commit Message

Jason Wang March 5, 2021, 6:26 a.m. UTC

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 <[e-mail]>
Reviewed-by: Mark Cave-Ayland <[e-mail]>
Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>
Signed-off-by: Jason Wang <[e-mail]>
---
 hw/net/sungem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/hw/net/sungem.c b/hw/net/sungem.c
index 33c3722df6..3684a4d733 100644
--- a/hw/net/sungem.c
+++ b/hw/net/sungem.c
@@ -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);
     }