net/xfrm/xfrm_state.c: fix error return code
authorJulia Lawall <Julia.Lawall@lip6.fr>
Wed, 29 Aug 2012 06:49:15 +0000 (06:49 +0000)
committerDavid S. Miller <davem@davemloft.net>
Fri, 31 Aug 2012 20:27:48 +0000 (16:27 -0400)
Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/xfrm/xfrm_state.c

index 87cd0e4d42829a19797ae3e2371c47723fd40fb7..210be48d8ae3c295a3f9e9642c356acd9866c92c 100644 (file)
@@ -1994,8 +1994,10 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
                goto error;
 
        x->outer_mode = xfrm_get_mode(x->props.mode, family);
-       if (x->outer_mode == NULL)
+       if (x->outer_mode == NULL) {
+               err = -EPROTONOSUPPORT;
                goto error;
+       }
 
        if (init_replay) {
                err = xfrm_init_replay(x);