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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:28 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:19 +0100
commitc638457a7c6b8931cd4586d6a13a33887185342d (patch)
tree7339cd480b668078f1b238ada053beca604ac97f /net
parenta4b2b58efd44db68358e1a6b71cf205c795d7ada (diff)
downloadlinux-c638457a7c6b8931cd4586d6a13a33887185342d.tar.bz2
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 <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>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/associola.c6
-rw-r--r--net/sctp/endpointola.c6
2 files changed, 6 insertions, 6 deletions
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);
}
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index efbc31877804..0e86f988f836 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -114,7 +114,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
ep->base.type = SCTP_EP_TYPE_SOCKET;
/* Initialize the basic object fields. */
- atomic_set(&ep->base.refcnt, 1);
+ refcount_set(&ep->base.refcnt, 1);
ep->base.dead = false;
/* Create an input queue. */
@@ -285,7 +285,7 @@ static void sctp_endpoint_destroy(struct sctp_endpoint *ep)
/* Hold a reference to an endpoint. */
void sctp_endpoint_hold(struct sctp_endpoint *ep)
{
- atomic_inc(&ep->base.refcnt);
+ refcount_inc(&ep->base.refcnt);
}
/* Release a reference to an endpoint and clean up if there are
@@ -293,7 +293,7 @@ void sctp_endpoint_hold(struct sctp_endpoint *ep)
*/
void sctp_endpoint_put(struct sctp_endpoint *ep)
{
- if (atomic_dec_and_test(&ep->base.refcnt))
+ if (refcount_dec_and_test(&ep->base.refcnt))
sctp_endpoint_destroy(ep);
}