diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-06-30 13:07:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-01 07:39:07 -0700 |
| commit | 633547973ffc32fd2c815639d4675e1531f0896f (patch) | |
| tree | 751ca7a379366af93f578d9f35f48339d4d2dd9b /drivers/s390/net/netiucv.c | |
| parent | 53869cebce4bc53f71a080e7830600d4ae1ab712 (diff) | |
| download | linux-633547973ffc32fd2c815639d4675e1531f0896f.tar.bz2 | |
net: convert sk_buff.users 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 'drivers/s390/net/netiucv.c')
| -rw-r--r-- | drivers/s390/net/netiucv.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c index 7db427c0a6a4..1579695f4e64 100644 --- a/drivers/s390/net/netiucv.c +++ b/drivers/s390/net/netiucv.c @@ -743,7 +743,7 @@ static void conn_action_txdone(fsm_instance *fi, int event, void *arg) conn->prof.tx_pending--; if (single_flag) { if ((skb = skb_dequeue(&conn->commit_queue))) { - atomic_dec(&skb->users); + refcount_dec(&skb->users); if (privptr) { privptr->stats.tx_packets++; privptr->stats.tx_bytes += @@ -766,7 +766,7 @@ static void conn_action_txdone(fsm_instance *fi, int event, void *arg) txbytes += skb->len; txpackets++; stat_maxcq++; - atomic_dec(&skb->users); + refcount_dec(&skb->users); dev_kfree_skb_any(skb); } if (conn->collect_len > conn->prof.maxmulti) @@ -958,7 +958,7 @@ static void netiucv_purge_skb_queue(struct sk_buff_head *q) struct sk_buff *skb; while ((skb = skb_dequeue(q))) { - atomic_dec(&skb->users); + refcount_dec(&skb->users); dev_kfree_skb_any(skb); } } @@ -1176,7 +1176,7 @@ static int netiucv_transmit_skb(struct iucv_connection *conn, IUCV_DBF_TEXT(data, 2, "EBUSY from netiucv_transmit_skb\n"); } else { - atomic_inc(&skb->users); + refcount_inc(&skb->users); skb_queue_tail(&conn->collect_queue, skb); conn->collect_len += l; rc = 0; @@ -1245,7 +1245,7 @@ static int netiucv_transmit_skb(struct iucv_connection *conn, } else { if (copied) dev_kfree_skb(skb); - atomic_inc(&nskb->users); + refcount_inc(&nskb->users); skb_queue_tail(&conn->commit_queue, nskb); } } |