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authorElena Reshetova <elena.reshetova@intel.com>2017-03-17 13:12:46 +0200
committerMarcel Holtmann <marcel@holtmann.org>2017-04-12 22:02:36 +0200
commitdab6b5daeeb3e70bfb2ed2d6d6f02dd387e3b338 (patch)
treef53267726421189109c1e348965ac84e4281ac5c /net
parent9232259913022c1ab96f7bf2b87598b89b942f1f (diff)
downloadlinux-dab6b5daeeb3e70bfb2ed2d6d6f02dd387e3b338.tar.bz2
Bluetooth: convert rfcomm_dlc.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: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/rfcomm/core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index f7eb02f09b54..8ebca9033d60 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -311,7 +311,7 @@ struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio)
skb_queue_head_init(&d->tx_queue);
mutex_init(&d->lock);
- atomic_set(&d->refcnt, 1);
+ refcount_set(&d->refcnt, 1);
rfcomm_dlc_clear_state(d);
@@ -342,7 +342,7 @@ static void rfcomm_dlc_unlink(struct rfcomm_dlc *d)
{
struct rfcomm_session *s = d->session;
- BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s);
+ BT_DBG("dlc %p refcnt %d session %p", d, refcount_read(&d->refcnt), s);
list_del(&d->list);
d->session = NULL;