Patch "xfrm: NULL dereference on allocation failure" has been added to the 4.11-stable tree

Patch "xfrm: NULL dereference on allocation failure" has been added to the 4.11-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    xfrm: NULL dereference on allocation failure

to the 4.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     xfrm-null-dereference-on-allocation-failure.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From e747f64336fc15e1c823344942923195b800aa1e Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 14 Jun 2017 13:35:37 +0300
Subject: xfrm: NULL dereference on allocation failure

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

commit e747f64336fc15e1c823344942923195b800aa1e upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/key/af_key.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1157,6 +1157,7 @@ static struct xfrm_state * pfkey_msg2xfr
 			goto out;
 	}
 
+	err = -ENOBUFS;
 	key = ext_hdrs[SADB_EXT_KEY_AUTH - 1];
 	if (sa->sadb_sa_auth) {
 		int keysize = 0;


Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.11/xfrm-oops-on-error-in-pfkey_msg2xfrm_state.patch
queue-4.11/xfrm-null-dereference-on-allocation-failure.patch