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xfrm: Cleanup error handling of xfrm_state_clone 

The error pointer passed to xfrm_state_clone() is unchecked,
so remove it and indicate an error by returning a null pointer.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert 2014-02-19 13:33:24 +01:00
parent d2c5f65825
commit cc9ab60e57
1 changed files with 5 additions and 11 deletions
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16
net/xfrm/xfrm_state.c
View File

@ -1148,10 +1148,9 @@ out:
EXPORT_SYMBOL(xfrm_state_add);
#ifdef CONFIG_XFRM_MIGRATE
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig)
{
struct net *net = xs_net(orig);
int err = -ENOMEM;
struct xfrm_state *x = xfrm_state_alloc(net);
if (!x)
goto out;
@ -1200,15 +1199,13 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
}
if (orig->replay_esn) {
err = xfrm_replay_clone(x, orig);
if (err)
if (xfrm_replay_clone(x, orig))
goto error;
}
memcpy(&x->mark, &orig->mark, sizeof(x->mark));
err = xfrm_init_state(x);
if (err)
if (xfrm_init_state(x) < 0)
goto error;
x->props.flags = orig->props.flags;
@ -1223,8 +1220,6 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
error:
xfrm_state_put(x);
out:
if (errp)
*errp = err;
return NULL;
}
@ -1276,9 +1271,8 @@ struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
struct xfrm_migrate *m)
{
struct xfrm_state *xc;
int err;
xc = xfrm_state_clone(x, &err);
xc = xfrm_state_clone(x);
if (!xc)
return NULL;
@ -1291,7 +1285,7 @@ struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
state is to be updated as it is a part of triplet */
xfrm_state_insert(xc);
} else {
if ((err = xfrm_state_add(xc)) < 0)
if (xfrm_state_add(xc) < 0)
goto error;
}