From: Samuel Obuch samuel.obuch@codasip.com
The maximum length is capped similarly to the emaclite_send function. Avoid integer underflow for values of ip->ip_len < 30, the minimum length of an IP packet is 21 bytes.
Signed-off-by: Samuel Obuch samuel.obuch@codasip.com --- drivers/net/xilinx_emaclite.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/xilinx_emaclite.c b/drivers/net/xilinx_emaclite.c index a4851ad36f..16ba915fba 100644 --- a/drivers/net/xilinx_emaclite.c +++ b/drivers/net/xilinx_emaclite.c @@ -517,6 +517,8 @@ try_again: length = ntohs(ip->ip_len); length += ETHER_HDR_SIZE + ETH_FCS_LEN; debug("IP Packet %x\n", length); + if (length > PKTSIZE) + length = PKTSIZE; break; default: debug("Other Packet\n"); @@ -525,7 +527,7 @@ try_again: }
/* Read the rest of the packet which is longer then first read */ - if (length != first_read) + if (length > first_read) xemaclite_alignedread(addr + first_read, etherrxbuff + first_read, length - first_read);