linux-kernel - Re: [PATCH v2 2/8] pipe: move limit checking logic into pipe_set

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Message-ID: <1e7bdfb3-0772-c152-8da1-3d22b56682b3@oracle.com>
Date:   Thu, 29 Sep 2016 13:26:18 +0200
From:   Vegard Nossum <vegard.nossum@...cle.com>
To:     "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Willy Tarreau <w@....eu>, socketpair@...il.com,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Jens Axboe <axboe@...com>, Al Viro <viro@...iv.linux.org.uk>,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v2 2/8] pipe: move limit checking logic into
 pipe_set_size()

On 08/29/2016 02:21 AM, Michael Kerrisk (man-pages) wrote:
> This is a preparatory patch for following work. Move the F_SETPIPE_SZ
> limit-checking logic from pipe_fcntl() into pipe_set_size().  This
> simplifies the code a little, and allows for reworking required in
> a later patch that fixes the limit checking in pipe_set_size()

> +	if ((too_many_pipe_buffers_hard(pipe->user) ||
> +			too_many_pipe_buffers_soft(pipe->user)) &&
> +			!capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN))
> +		return -EPERM;

Some might say the indentation is off here. Not sure why checkpatch
didn't care.

Otherwise looks fine to me.


Vegard