From 41c6d650f6537e55a1b53438c646fbc3f49176bf Mon Sep 17 00:00:00 2001 From: "Reshetova, Elena" Date: Fri, 30 Jun 2017 13:08:01 +0300 Subject: net: convert sock.sk_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. This patch uses refcount_inc_not_zero() instead of atomic_inc_not_zero_hint() due to absense of a _hint() version of refcount API. If the hint() version must be used, we might need to revisit API. 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 --- net/phonet/socket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/phonet') diff --git a/net/phonet/socket.c b/net/phonet/socket.c index 29c7f754c70d..1b050dd17393 100644 --- a/net/phonet/socket.c +++ b/net/phonet/socket.c @@ -614,7 +614,7 @@ static int pn_sock_seq_show(struct seq_file *seq, void *v) sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), sock_i_ino(sk), - atomic_read(&sk->sk_refcnt), sk, + refcount_read(&sk->sk_refcnt), sk, atomic_read(&sk->sk_drops)); } seq_pad(seq, '\n'); -- cgit v1.2.3