hw/net/tulip: Log descriptor overflows

Log with GUEST_ERROR what the guest is doing wrong.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>

diff --git a/hw/net/tulip.c b/hw/net/tulip.c
index 57ecbe2..4487fd6 100644 (file)
--- a/hw/net/tulip.c
+++ b/hw/net/tulip.c
@@ -578,6 +578,9 @@ static int tulip_copy_tx_buffers(TULIPState *s, struct tulip_descriptor *desc)
     int len2 = (desc->control >> TDES1_BUF2_SIZE_SHIFT) & TDES1_BUF2_SIZE_MASK;
 
     if (s->tx_frame_len + len1 > sizeof(s->tx_frame)) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: descriptor overflow (ofs: %u, len:%d, size:%zu)\n",
+                      __func__, s->tx_frame_len, len1, sizeof(s->tx_frame));
         return -1;
     }
     if (len1) {
@@ -587,6 +590,9 @@ static int tulip_copy_tx_buffers(TULIPState *s, struct tulip_descriptor *desc)
     }
 
     if (s->tx_frame_len + len2 > sizeof(s->tx_frame)) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: descriptor overflow (ofs: %u, len:%d, size:%zu)\n",
+                      __func__, s->tx_frame_len, len2, sizeof(s->tx_frame));
         return -1;
     }
     if (len2) {