diff options
| -rw-r--r-- | hw/ne2000.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/hw/ne2000.c b/hw/ne2000.c index 1625c55..6d5aa56 100644 --- a/hw/ne2000.c +++ b/hw/ne2000.c @@ -224,7 +224,7 @@ static void ne2000_receive(void *opaque, const uint8_t *buf, int size) { NE2000State *s = opaque; uint8_t *p; - int total_len, next, avail, len, index, mcast_idx; + unsigned int total_len, next, avail, len, index, mcast_idx; uint8_t buf1[60]; static const uint8_t broadcast_macaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; @@ -293,7 +293,10 @@ static void ne2000_receive(void *opaque, const uint8_t *buf, int size) /* write packet data */ while (size > 0) { - avail = s->stop - index; + if (index <= s->stop) + avail = s->stop - index; + else + avail = 0; len = size; if (len > avail) len = avail; |