From 633547973ffc32fd2c815639d4675e1531f0896f Mon Sep 17 00:00:00 2001
From: "Reshetova, Elena" <elena.reshetova@intel.com>
Date: Fri, 30 Jun 2017 13:07:58 +0300
Subject: net: convert sk_buff.users from atomic_t to refcount_t

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/rionet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/net/rionet.c')

diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
index 300bb1479b3a..e9f101c9bae2 100644
--- a/drivers/net/rionet.c
+++ b/drivers/net/rionet.c
@@ -201,7 +201,7 @@ static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 				rionet_queue_tx_msg(skb, ndev,
 					nets[rnet->mport->id].active[i]);
 				if (count)
-					atomic_inc(&skb->users);
+					refcount_inc(&skb->users);
 				count++;
 			}
 	} else if (RIONET_MAC_MATCH(eth->h_dest)) {
-- 
cgit