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authorReshetova, Elena <elena.reshetova@intel.com>2017-06-30 13:08:04 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-01 17:39:08 +0300
commit433cea4d9bbb83cc848b80c51bb849a2ceb49379 (patch)
treef881041efadd6139806c3f29691881b751228fec /include/linux/netpoll.h
parent7658b36f1b3122c298213eed344f622e836b281b (diff)
downloadlinux-433cea4d9bbb83cc848b80c51bb849a2ceb49379.tar.xz
net: convert netpoll_info.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/netpoll.h')
-rw-r--r--include/linux/netpoll.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 1828900c9411..27c0aaa22cb0 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -11,6 +11,7 @@
#include <linux/interrupt.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
+#include <linux/refcount.h>
union inet_addr {
__u32 all[4];
@@ -34,7 +35,7 @@ struct netpoll {
};
struct netpoll_info {
- atomic_t refcnt;
+ refcount_t refcnt;
struct semaphore dev_lock;