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Subject[PATCH 3.16 192/233] xfrm: Oops on error in pfkey_msg2xfrm_state()
3.16.48-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@oracle.com>

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: Ben Hutchings <ben@decadent.org.uk>
---
net/key/af_key.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)

--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1167,8 +1167,10 @@ static struct xfrm_state * pfkey_msg2xfr
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) {
@@ -1187,8 +1189,10 @@ static struct xfrm_state * pfkey_msg2xfr
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 {
@@ -1202,8 +1206,10 @@ static struct xfrm_state * pfkey_msg2xfr
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) {
@@ -1247,8 +1253,10 @@ static struct xfrm_state * pfkey_msg2xfr
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];
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