Re: [patch] netfilter: potential NULL dereference in get_inner_hdr()

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From: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
Date: Mon, 14 May 2012 09:36:55 +0200

> On Saturday 12 May 2012 13:00:03 Dan Carpenter wrote:
>> There is a typo in the error checking and "&&" was used instead of "||".
>> If skb_header_pointer() returns NULL then it leads to a NULL
>> dereference.
>> 
>> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Ack-by: Hans Schillstrom <hans.schillstrom@xxxxxxxxxxxx>
>  
>> ---
>> Btw, this is new code and Sparse complains about endian bugs.
> 
> Can you give me some hints here, arch , compiler version etc.
> I guess it was input to hmark_addr_mask() that complains ?

He said what he's using, "sparse", the semantic parser, which
is largely arch agnostic.

I guarantee you will see the warnings if you run it on your
system on this code.


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