kni: fix segmented mbuf data overflow

'kni_net_rx_lo_fifo()' can get segmented buffers, using 'pkt_len' for
that case will be wrong and some values can cause buffer overflow
in destination mbuf data.

Fixes: d89a58dfe90b ("kni: support chained mbufs")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/kernel/linux/kni/kni_net.c b/kernel/linux/kni/kni_net.c
index a736407..7bd3a9f 100644 (file)
--- a/kernel/linux/kni/kni_net.c
+++ b/kernel/linux/kni/kni_net.c
@@ -438,7 +438,7 @@ kni_net_rx_lo_fifo(struct kni_dev *kni)
                /* Copy mbufs */
                for (i = 0; i < num; i++) {
                        kva = pa2kva(kni->pa[i]);
-                       len = kva->pkt_len;
+                       len = kva->data_len;
                        data_kva = kva2data_kva(kva);
                        kni->va[i] = pa2va(kni->pa[i], kva);