netdev - Re: [PATCH RFC net-next 1/6] sock: MSG_PEEK support for sk_error

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Date:   Thu, 18 Jan 2018 07:51:03 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Sowmini Varadhan <sowmini.varadhan@...cle.com>,
        netdev@...r.kernel.org, willemdebruijn.kernel@...il.com
Cc:     davem@...emloft.net, rds-devel@....oracle.com,
        santosh.shilimkar@...cle.com
Subject: Re: [PATCH RFC net-next 1/6] sock: MSG_PEEK support for
 sk_error_queue

On Wed, 2018-01-17 at 04:19 -0800, Sowmini Varadhan wrote:
> Allow the application the ability to use MSG_PEEK with sk_error_queue
> so that it can peek and re-read message in cases where MSG_TRUNC
> may be encountered.
> 
> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@...cle.com>


Lets not add buggy feature that only fuzzers love to use to trigger
awful bugs.

No serious (performance sensitive) application use MSG_PEEK, because of
extra syscall overhead.