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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:23 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:18 +0100
commit55eabed60a68e918abc44f6beb64f38cc008b29d (patch)
tree41de9aa9ab0982cc950c034da4918ee343447658 /net
parent850a6212c6fa151076dca045821c75025723bc46 (diff)
net, xfrm: convert sec_path.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')
-rw-r--r--net/xfrm/xfrm_input.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 9de4b1dbc0ae..923205e279f7 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -116,7 +116,7 @@ struct sec_path *secpath_dup(struct sec_path *src)
for (i = 0; i < sp->len; i++)
xfrm_state_hold(sp->xvec[i]);
}
- atomic_set(&sp->refcnt, 1);
+ refcount_set(&sp->refcnt, 1);
return sp;
}
EXPORT_SYMBOL(secpath_dup);
@@ -126,7 +126,7 @@ int secpath_set(struct sk_buff *skb)
struct sec_path *sp;
/* Allocate new secpath or COW existing one. */
- if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
+ if (!skb->sp || refcount_read(&skb->sp->refcnt) != 1) {
sp = secpath_dup(skb->sp);
if (!sp)
return -ENOMEM;