diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-07-04 15:52:56 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-05 00:35:15 +0300 |
| commit | 58951dde05fdac96a9d30805d8fa5d124dd4f92c (patch) | |
| tree | b5e998f9a8415ffd543a98b9e1cc91c5ad1b06db /include/net | |
| parent | bf72acefebb459af3c805a386cd7e5456e3ad6ee (diff) | |
| download | linux-58951dde05fdac96a9d30805d8fa5d124dd4f92c.tar.xz | |
net, llc: convert llc_sap.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 'include/net')
| -rw-r--r-- | include/net/llc.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/llc.h b/include/net/llc.h index e8e61d4fb458..dc35f25eb679 100644 --- a/include/net/llc.h +++ b/include/net/llc.h @@ -55,7 +55,7 @@ struct llc_sap { unsigned char state; unsigned char p_bit; unsigned char f_bit; - atomic_t refcnt; + refcount_t refcnt; int (*rcv_func)(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, @@ -113,14 +113,14 @@ struct llc_sap *llc_sap_open(unsigned char lsap, struct net_device *orig_dev)); static inline void llc_sap_hold(struct llc_sap *sap) { - atomic_inc(&sap->refcnt); + refcount_inc(&sap->refcnt); } void llc_sap_close(struct llc_sap *sap); static inline void llc_sap_put(struct llc_sap *sap) { - if (atomic_dec_and_test(&sap->refcnt)) + if (refcount_dec_and_test(&sap->refcnt)) llc_sap_close(sap); } |