From c638457a7c6b8931cd4586d6a13a33887185342d Mon Sep 17 00:00:00 2001 From: "Reshetova, Elena" Date: Tue, 4 Jul 2017 15:53:28 +0300 Subject: net, sctp: convert sctp_ep_common.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 Signed-off-by: Hans Liljestrand Signed-off-by: Kees Cook Signed-off-by: David Windsor Signed-off-by: David S. Miller --- net/sctp/associola.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'net/sctp/associola.c') diff --git a/net/sctp/associola.c b/net/sctp/associola.c index fa4f530ab7e1..40ec83679d6e 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -88,7 +88,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a asoc->base.type = SCTP_EP_TYPE_ASSOCIATION; /* Initialize the object handling fields. */ - atomic_set(&asoc->base.refcnt, 1); + refcount_set(&asoc->base.refcnt, 1); /* Initialize the bind addr area. */ sctp_bind_addr_init(&asoc->base.bind_addr, ep->base.bind_addr.port); @@ -873,7 +873,7 @@ void sctp_assoc_control_transport(struct sctp_association *asoc, /* Hold a reference to an association. */ void sctp_association_hold(struct sctp_association *asoc) { - atomic_inc(&asoc->base.refcnt); + refcount_inc(&asoc->base.refcnt); } /* Release a reference to an association and cleanup @@ -881,7 +881,7 @@ void sctp_association_hold(struct sctp_association *asoc) */ void sctp_association_put(struct sctp_association *asoc) { - if (atomic_dec_and_test(&asoc->base.refcnt)) + if (refcount_dec_and_test(&asoc->base.refcnt)) sctp_association_destroy(asoc); } -- cgit