linux-kernel - Re: [PATCH v3] tracefs: Set the group ownership in apply_options() not parse

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Date:   Fri, 25 Feb 2022 23:12:18 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] tracefs: Set the group ownership in apply_options()
 not parse_options()

On Fri, Feb 25, 2022 at 03:34:26PM -0500, Steven Rostedt wrote:
> From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
> 
> Al Viro brought it to my attention that the dentries may not be filled
> when the parse_options() is called, causing the call to set_gid() to
> possibly crash. It should only be called if parse_options() succeeds
> totally anyway.
> 
> He suggested the logical place to do the update is in apply_options().

Feel free to slap my Acked-by on that variant...