From 9f23743017d11c103b38d2fa1f64674baeca41cd Mon Sep 17 00:00:00 2001
From: "Reshetova, Elena" <elena.reshetova@intel.com>
Date: Fri, 30 Jun 2017 13:07:55 +0300
Subject: net: convert neighbour.refcnt 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>
---
 net/decnet/dn_neigh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'net/decnet')

diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c
index eeb5fc561f80..21dedf6fd0f7 100644
--- a/net/decnet/dn_neigh.c
+++ b/net/decnet/dn_neigh.c
@@ -559,7 +559,7 @@ static inline void dn_neigh_format_entry(struct seq_file *seq,
 		   (dn->flags&DN_NDFLAG_R2) ? "2" : "-",
 		   (dn->flags&DN_NDFLAG_P3) ? "3" : "-",
 		   dn->n.nud_state,
-		   atomic_read(&dn->n.refcnt),
+		   refcount_read(&dn->n.refcnt),
 		   dn->blksize,
 		   (dn->n.dev) ? dn->n.dev->name : "?");
 	read_unlock(&n->lock);
-- 
cgit