linux-kernel - [PATCH 4.3 02/71] r8169: fix kasan reported skb use-after-free.

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Date:	Sat, 12 Dec 2015 12:05:26 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Francois Romieu <romieu@...zoreil.com>,
	Dave Jones <davej@...emonkey.org.uk>,
	Eric Dumazet <edumazet@...gle.com>,
	Corinna Vinschen <vinschen@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.3 02/71] r8169: fix kasan reported skb use-after-free.

4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?fran=C3=A7ois=20romieu?= <romieu@...zoreil.com>

[ Upstream commit 39174291d8e8acfd1113214a943263aaa03c57c8 ]

Signed-off-by: Francois Romieu <romieu@...zoreil.com>
Reported-by: Dave Jones <davej@...emonkey.org.uk>
Fixes: d7d2d89d4b0af ("r8169: Add software counter for multicast packages")
Acked-by: Eric Dumazet <edumazet@...gle.com>
Acked-by: Corinna Vinschen <vinschen@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/realtek/r8169.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -7429,15 +7429,15 @@ process_pkt:
 
 			rtl8169_rx_vlan_tag(desc, skb);
 
+			if (skb->pkt_type == PACKET_MULTICAST)
+				dev->stats.multicast++;
+
 			napi_gro_receive(&tp->napi, skb);
 
 			u64_stats_update_begin(&tp->rx_stats.syncp);
 			tp->rx_stats.packets++;
 			tp->rx_stats.bytes += pkt_size;
 			u64_stats_update_end(&tp->rx_stats.syncp);
-
-			if (skb->pkt_type == PACKET_MULTICAST)
-				dev->stats.multicast++;
 		}
 release_descriptor:
 		desc->opts2 = 0;


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