diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-07-04 14:53:02 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-04 23:35:16 +0200 |
| commit | 788936641ac8bc92c531f09b79bf44775fac1350 (patch) | |
| tree | 2e7a55d6a17897f390bfd19612231c7d672e6c33 | |
| parent | net, atm: convert atm_dev.refcnt from atomic_t to refcount_t (diff) | |
| download | linux-788936641ac8bc92c531f09b79bf44775fac1350.tar.xz linux-788936641ac8bc92c531f09b79bf44775fac1350.zip | |
net, atm: convert lec_arp_table.usage 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>
| -rw-r--r-- | net/atm/lec.c | 6 | ||||
| -rw-r--r-- | net/atm/lec_arpc.h | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/net/atm/lec.c b/net/atm/lec.c index 75545717fa46..093fe8707731 100644 --- a/net/atm/lec.c +++ b/net/atm/lec.c @@ -101,12 +101,12 @@ static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); /* must be done under lec_arp_lock */ static inline void lec_arp_hold(struct lec_arp_table *entry) { - atomic_inc(&entry->usage); + refcount_inc(&entry->usage); } static inline void lec_arp_put(struct lec_arp_table *entry) { - if (atomic_dec_and_test(&entry->usage)) + if (refcount_dec_and_test(&entry->usage)) kfree(entry); } @@ -1564,7 +1564,7 @@ static struct lec_arp_table *make_entry(struct lec_priv *priv, to_return->last_used = jiffies; to_return->priv = priv; skb_queue_head_init(&to_return->tx_wait); - atomic_set(&to_return->usage, 1); + refcount_set(&to_return->usage, 1); return to_return; } diff --git a/net/atm/lec_arpc.h b/net/atm/lec_arpc.h index ec67435a40a6..d923f53812a3 100644 --- a/net/atm/lec_arpc.h +++ b/net/atm/lec_arpc.h @@ -47,7 +47,7 @@ struct lec_arp_table { * the length of the tlvs array */ struct sk_buff_head tx_wait; /* wait queue for outgoing packets */ - atomic_t usage; /* usage count */ + refcount_t usage; /* usage count */ }; /* |