netdev - Re: [PATCH 2/3] netfilter: potential null derefence.

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Message-ID: <CAOD=uF5O=VJheUhxg7zadpq8p+bqa_M2jiKE1mqLXz6JJps-sg@mail.gmail.com>
Date:	Thu, 1 Mar 2012 15:53:29 +0530
From:	santosh prasad nayak <santoshprasadnayak@...il.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	bart.de.schuymer@...dora.be, kaber@...sh.net,
	shemminger@...tta.com, davem@...emloft.net,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, bridge@...ts.linux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 2/3] netfilter: potential null derefence.

Hi Pablo,

Please look at the last line of my patch.
I have added a new label "out"

regards
santosh

On Thu, Mar 1, 2012 at 3:51 PM, Pablo Neira Ayuso <pablo@...filter.org> wrote:
> On Thu, Mar 01, 2012 at 02:47:14PM +0530, santosh nayak wrote:
>> From: Santosh Nayak <santoshprasadnayak@...il.com>
>>
>> I am getting following error.
>> " net/bridge/netfilter/ebtables.c:269 ebt_do_table()
>>   error: potential null derefence 'cs'"
>>
>>     i = cs[sp].n;  // If cs == Null then this will cause problem.
>>
>> Signed-off-by: Santosh Nayak <santoshprasadnayak@...il.com>
>> ---
>>  net/bridge/netfilter/ebtables.c |    5 ++++-
>>  1 files changed, 4 insertions(+), 1 deletions(-)
>>
>> diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
>> index f3fcbd9..9c0f177 100644
>> --- a/net/bridge/netfilter/ebtables.c
>> +++ b/net/bridge/netfilter/ebtables.c
>> @@ -209,8 +209,10 @@ unsigned int ebt_do_table (unsigned int hook, struct sk_buff *skb,
>>          smp_processor_id());
>>       if (private->chainstack)
>>               cs = private->chainstack[smp_processor_id()];
>> -     else
>> +     else {
>>               cs = NULL;
>> +             goto out;
>
> There is no "out" label in ebt_do_table !!
--
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