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Re: [PATCH v4 0/3] Fix {recv,send}{m}msg standard compliance (BZ#16919)
- From: Adhemerval Zanella <adhemerval dot zanella at linaro dot org>
- To: libc-alpha at sourceware dot org
- Date: Wed, 6 Apr 2016 15:24:26 -0300
- Subject: Re: [PATCH v4 0/3] Fix {recv,send}{m}msg standard compliance (BZ#16919)
- Authentication-results: sourceware.org; auth=none
- References: <1459175641-12520-1-git-send-email-adhemerval dot zanella at linaro dot org> <56FE7CDD dot 2070109 at linaro dot org>
Ping.
On 01-04-2016 10:51, Adhemerval Zanella wrote:
> Joseph,
>
> Besides the comment in first patch from the set do you have any more
> upcoming comments or regards about the changes?
>
> On 28-03-2016 11:33, Adhemerval Zanella wrote:
>>
>> 1. Current sendmsg fix does not handle larger msg_control neither
>> pads the cmsghdr associated. The problem with this approach
>> is to accomplish a complete fix it will require to allocate
>> a limited buffer, copying the incoming struct and zero pad.
>> Although it tend to work it also add some limitation of total
>> msg_control length.
>> The general usage for such facily is passing file descriptors
>> and permissions between processes over unix sockets so it might
>> be factible to use a large stack allocated buffer (1024, 2048
>> or large) and return ENOMEM for larger buffers.
>
> This is the only remaining issue for bz16919 which this patch does
> not address directly, but I am intend to send an upcoming patch to
> get some discussion if the idea is the best approach.
>