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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: Fri, 1 Apr 2016 10:51:25 -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>
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.