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authorReshetova, Elena <elena.reshetova@intel.com>2017-06-30 13:08:02 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-01 17:39:08 +0300
commit8851ab526791530d00bbbd0952512d68684a44b8 (patch)
tree243643b2d0b72bed9947ec525be6f6142e2b6840 /include/linux/igmp.h
parent41c6d650f6537e55a1b53438c646fbc3f49176bf (diff)
downloadlinux-8851ab526791530d00bbbd0952512d68684a44b8.tar.xz
net: convert ip_mc_list.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/linux/igmp.h')
-rw-r--r--include/linux/igmp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h
index 12f6fba6d21a..97caf1821de8 100644
--- a/include/linux/igmp.h
+++ b/include/linux/igmp.h
@@ -18,6 +18,7 @@
#include <linux/skbuff.h>
#include <linux/timer.h>
#include <linux/in.h>
+#include <linux/refcount.h>
#include <uapi/linux/igmp.h>
static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
@@ -84,7 +85,7 @@ struct ip_mc_list {
struct ip_mc_list __rcu *next_hash;
struct timer_list timer;
int users;
- atomic_t refcnt;
+ refcount_t refcnt;
spinlock_t lock;
char tm_running;
char reporter;