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Date: Fri, 14 Jul 2017 10:23:12 -0700 (PDT)
Message-Id: <20170714.102312.821784668156442305.davem@davemloft.net>
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Subject: Re: [PATCH v2] sctp: don't dereference ptr before leaving
 _sctp_walk_{params,errors}()
From: David Miller <davem@davemloft.net>
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From: Alexander Potapenko <glider@google.com>
Date: Fri, 14 Jul 2017 18:33:01 +0200

> On Fri, Jul 14, 2017 at 5:58 PM, David Miller <davem@davemloft.net> wrote:
>> From: Alexander Potapenko <glider@google.com>
>> Date: Fri, 14 Jul 2017 12:03:29 +0200
>>
>>>  v2: per comment from David Miller, make sure the whole iterator->length
>>>      fits into the remaining buffer.
>>
>> Please compile and functionally test your changes:
>>
>> In file included from ./include/linux/compiler.h:58:0,
>>                  from ./include/uapi/linux/stddef.h:1,
>>                  from ./include/linux/stddef.h:4,
>>                  from ./include/uapi/linux/posix_types.h:4,
>>                  from ./include/uapi/linux/types.h:13,
>>                  from ./include/linux/types.h:5,
>>                  from net/sctp/sm_statefuns.c:48:
>> net/sctp/sm_statefuns.c: In function ?sctp_sf_do_reconf?:
>> ./include/net/sctp/sctp.h:472:24: error: unknown type name ?sctp_paramhdr_t?
>>       (pos.v + offsetof(sctp_paramhdr_t, length) + sizeof(pos.p->length) <\
>>                         ^
> Oops. Fixed.

Did you functionally test the new version or just do a quick compile
check and resubmit?

I really want you to test this if the logic has been changed.