diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-06-30 13:07:57 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-01 07:39:07 -0700 |
| commit | 53869cebce4bc53f71a080e7830600d4ae1ab712 (patch) | |
| tree | c99b8ea34f0b909e5db784b7426e1afcb21aeabf /net/bridge | |
| parent | 6343944bc1050dcec7c959f484ee0fb6928db3be (diff) | |
| download | lwn-53869cebce4bc53f71a080e7830600d4ae1ab712.tar.gz lwn-53869cebce4bc53f71a080e7830600d4ae1ab712.zip | |
net: convert nf_bridge_info.use 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/bridge')
| -rw-r--r-- | net/bridge/br_netfilter_hooks.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c index 067cf0313449..2261e5194c82 100644 --- a/net/bridge/br_netfilter_hooks.c +++ b/net/bridge/br_netfilter_hooks.c @@ -149,12 +149,12 @@ static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb) { struct nf_bridge_info *nf_bridge = skb->nf_bridge; - if (atomic_read(&nf_bridge->use) > 1) { + if (refcount_read(&nf_bridge->use) > 1) { struct nf_bridge_info *tmp = nf_bridge_alloc(skb); if (tmp) { memcpy(tmp, nf_bridge, sizeof(struct nf_bridge_info)); - atomic_set(&tmp->use, 1); + refcount_set(&tmp->use, 1); } nf_bridge_put(nf_bridge); nf_bridge = tmp; |