From: Ferruh Yigit <ferruh.yigit@intel.com>
Date: Thu, 11 Jul 2019 12:35:07 +0000 (+0100)
Subject: kni: fix segmented mbuf data overflow
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=60d7debe922b14dcda96766fabbe7ad3f012800c

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 a736407e66..7bd3a9f1ea 100644
--- 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);