From 156be7edc85b4aeb0f31029f4d60c3de0c997f27 Mon Sep 17 00:00:00 2001 From: "Reshetova, Elena" Date: Tue, 4 Jul 2017 15:53:12 +0300 Subject: net, netrom: convert nr_node.refcount 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 Signed-off-by: Hans Liljestrand Signed-off-by: Kees Cook Signed-off-by: David Windsor Signed-off-by: David S. Miller --- include/net/netrom.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/net/netrom.h') diff --git a/include/net/netrom.h b/include/net/netrom.h index cecb4fde0243..443a4ffca7aa 100644 --- a/include/net/netrom.h +++ b/include/net/netrom.h @@ -110,7 +110,7 @@ struct nr_node { unsigned char which; unsigned char count; struct nr_route routes[3]; - atomic_t refcount; + refcount_t refcount; spinlock_t node_lock; }; @@ -119,11 +119,11 @@ struct nr_node { *********************************************************************/ #define nr_node_hold(__nr_node) \ - atomic_inc(&((__nr_node)->refcount)) + refcount_inc(&((__nr_node)->refcount)) static __inline__ void nr_node_put(struct nr_node *nr_node) { - if (atomic_dec_and_test(&nr_node->refcount)) { + if (refcount_dec_and_test(&nr_node->refcount)) { kfree(nr_node); } } -- cgit v1.2.1