linux-kernel - Re: [PATCH RT] signal: Prevent double-free of user struct

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Message-ID: <20200416080505.ec4m4yifgyfti4kf@linutronix.de>
Date:   Thu, 16 Apr 2020 10:05:05 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Daniel Wagner <wagi@...om.org>
Cc:     Matt Fleming <matt@...eblueprint.co.uk>, linux-rt@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RT] signal: Prevent double-free of user struct

On 2020-04-15 21:05:14 [+0200], Daniel Wagner wrote:
> Hi Sebastian,
Hi Daniel,

> This can be triggered by running sigwaittest.
> 
>  # sigwaittest -t -a -p 98
> 
> a few seconds should be enough to get the splat.

thank you.

> > This is v5.6 only, correct?
> 
> I've seen this also with a frankstein version of 5.2-rt...v5-4-rt :)

…

> Thanks,
> Daniel

Sebastian