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xfrm: Oops on error in pfkey_msg2xfrm_state()

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commit 1e3d0c2c70cd3edb5deed186c5f5c75f2b84a633 upstream.

There are some missing error codes here so we accidentally return NULL
instead of an error pointer.  It results in a NULL pointer dereference.

Fixes: df71837d5024 ("[LSM-IPSec]: Security association restriction.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2017-06-14 13:34:05 +03:00 committed by Greg Kroah-Hartman
parent c460f2beb6
commit ac2730234c
1 changed files with 12 additions and 4 deletions
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16
net/key/af_key.c
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@ -1147,8 +1147,10 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
if (key)
keysize = (key->sadb_key_bits + 7) / 8;
x->aalg = kmalloc(sizeof(*x->aalg) + keysize, GFP_KERNEL);
if (!x->aalg)
if (!x->aalg) {
err = -ENOMEM;
goto out;
}
strcpy(x->aalg->alg_name, a->name);
x->aalg->alg_key_len = 0;
if (key) {
@ -1167,8 +1169,10 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
goto out;
}
x->calg = kmalloc(sizeof(*x->calg), GFP_KERNEL);
if (!x->calg)
if (!x->calg) {
err = -ENOMEM;
goto out;
}
strcpy(x->calg->alg_name, a->name);
x->props.calgo = sa->sadb_sa_encrypt;
} else {
@ -1182,8 +1186,10 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
if (key)
keysize = (key->sadb_key_bits + 7) / 8;
x->ealg = kmalloc(sizeof(*x->ealg) + keysize, GFP_KERNEL);
if (!x->ealg)
if (!x->ealg) {
err = -ENOMEM;
goto out;
}
strcpy(x->ealg->alg_name, a->name);
x->ealg->alg_key_len = 0;
if (key) {
@ -1228,8 +1234,10 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net,
struct xfrm_encap_tmpl *natt;
x->encap = kmalloc(sizeof(*x->encap), GFP_KERNEL);
if (!x->encap)
if (!x->encap) {
err = -ENOMEM;
goto out;
}
natt = x->encap;
n_type = ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1];