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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-06-14 13:35:37 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-06-14 12:40:49 +0200 |
| commit | e747f64336fc15e1c823344942923195b800aa1e (patch) | |
| tree | ba3856066d9146c5173a77e130619f301520b75b /net/key | |
| parent | 1e3d0c2c70cd3edb5deed186c5f5c75f2b84a633 (diff) | |
| download | lwn-e747f64336fc15e1c823344942923195b800aa1e.tar.gz lwn-e747f64336fc15e1c823344942923195b800aa1e.zip | |
xfrm: NULL dereference on allocation failure
The default error code in pfkey_msg2xfrm_state() is -ENOBUFS. We
added a new call to security_xfrm_state_alloc() which sets "err" to zero
so there several places where we can return ERR_PTR(0) if kmalloc()
fails. The caller is expecting error pointers so it leads to a NULL
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>
Diffstat (limited to 'net/key')
| -rw-r--r-- | net/key/af_key.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c index 2b82adac5d8e..b1432b668033 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1157,6 +1157,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct net *net, goto out; } + err = -ENOBUFS; key = ext_hdrs[SADB_EXT_KEY_AUTH - 1]; if (sa->sadb_sa_auth) { int keysize = 0; |