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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:05 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:16 +0100
commit2512775985969a3dadb09670701f0c16499ee784 (patch)
treef4da992f7040901e2ce7d7ea26e5e32b94dac686 /net/bridge/br_private.h
parente00bdbefab731638c0764cf1b9b7398bfbf2bd99 (diff)
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net, bridge: convert net_bridge_vlan.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 'net/bridge/br_private.h')
-rw-r--r--net/bridge/br_private.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index c18682f804a0..fd9ee73e0a6d 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -21,6 +21,7 @@
#include <net/ip6_fib.h>
#include <linux/if_vlan.h>
#include <linux/rhashtable.h>
+#include <linux/refcount.h>
#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)
@@ -127,7 +128,7 @@ struct net_bridge_vlan {
struct net_bridge_port *port;
};
union {
- atomic_t refcnt;
+ refcount_t refcnt;
struct net_bridge_vlan *brvlan;
};