diff mbox

xfrm6: remove unneeded NULL check in __xfrm6_output()

Message ID 20120201074526.GC22179@elgon.mountain
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Dan Carpenter Feb. 1, 2012, 7:45 a.m. UTC
We don't check for NULL consistently in __xfrm6_output().  If "x" were
NULL here it would lead to an OOPs later.  I asked Steffen Klassert
about this and he suggested that we remove the NULL check.

On 10/29/11, Steffen Klassert <steffen.klassert@secunet.com> wrote:
>> net/ipv6/xfrm6_output.c
>>    148	
>>    149		if ((x && x->props.mode == XFRM_MODE_TUNNEL) &&
>>                           ^
>
> x can't be null here. It would be a bug if __xfrm6_output() is called
> without a xfrm_state attached to the skb. I think we can just remove
> this null check.

Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

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Comments

David Miller Feb. 1, 2012, 7:53 a.m. UTC | #1
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 1 Feb 2012 10:45:26 +0300

> We don't check for NULL consistently in __xfrm6_output().  If "x" were
> NULL here it would lead to an OOPs later.  I asked Steffen Klassert
> about this and he suggested that we remove the NULL check.
> 
> On 10/29/11, Steffen Klassert <steffen.klassert@secunet.com> wrote:
>>> net/ipv6/xfrm6_output.c
>>>    148	
>>>    149		if ((x && x->props.mode == XFRM_MODE_TUNNEL) &&
>>>                           ^
>>
>> x can't be null here. It would be a bug if __xfrm6_output() is called
>> without a xfrm_state attached to the skb. I think we can just remove
>> this null check.
> 
> Cc: Steffen Klassert <steffen.klassert@secunet.com>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Applied, thanks Dan.
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diff mbox

Patch

diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 4eeff89..8755a30 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -146,7 +146,7 @@  static int __xfrm6_output(struct sk_buff *skb)
 		return -EMSGSIZE;
 	}
 
-	if ((x && x->props.mode == XFRM_MODE_TUNNEL) &&
+	if (x->props.mode == XFRM_MODE_TUNNEL &&
 	    ((skb->len > mtu && !skb_is_gso(skb)) ||
 		dst_allfrag(skb_dst(skb)))) {
 			return ip6_fragment(skb, x->outer_mode->afinfo->output_finish);