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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:08 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:16 +0100
commit0408c58be5a475c99b271f08d85859f7b59ec767 (patch)
tree100c31c9fab2ae3b9fee699c83fa798cfbb0baad /include/net/lapb.h
parent7b9364050246bd4c24b36b71c8990b2922dcc027 (diff)
downloadlinux-0408c58be5a475c99b271f08d85859f7b59ec767.tar.gz
net, lapb: convert lapb_cb.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/lapb.h')
-rw-r--r--include/net/lapb.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/lapb.h b/include/net/lapb.h
index 9510f8725f03..85e773742f4e 100644
--- a/include/net/lapb.h
+++ b/include/net/lapb.h
@@ -1,6 +1,7 @@
 #ifndef _LAPB_H
 #define _LAPB_H 
 #include <linux/lapb.h>
+#include <linux/refcount.h>
 
 #define	LAPB_HEADER_LEN	20		/* LAPB over Ethernet + a bit more */
 
@@ -101,7 +102,7 @@ struct lapb_cb {
 	struct lapb_frame	frmr_data;
 	unsigned char		frmr_type;
 
-	atomic_t		refcnt;
+	refcount_t		refcnt;
 };
 
 /* lapb_iface.c */