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Date: Tue, 11 Aug 2026 16:51:40 +0900
From: Greg KH <gregkh@linuxfoundation.org>
To: Yunshui Jiang <jiangyunshui@kylinos.cn>
Cc: linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev,
	martyn@welchs.me.uk, kees@kernel.org
Subject: Re: [PATCH] staging: vme_user: fake: stop tasklet before freeing its
 data
Message-ID: <2026081116-flounder-facing-6ef7@gregkh>
References: <20260811073039.288957-1-jiangyunshui@kylinos.cn>
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In-Reply-To: <20260811073039.288957-1-jiangyunshui@kylinos.cn>

On Tue, Aug 11, 2026 at 03:30:39PM +0800, Yunshui Jiang wrote:
> From: jiangyunshui <jiangyunshui@kylinos.cn>

Full name please, not just an email address.

> fake_init() arms a tasklet whose callback fake_VIRQ_tasklet()
> dereferences fake_bridge and fake_bridge->driver_priv. Both fake_exit()
> and the err_master error path of fake_init() free
> fake_bridge->driver_priv (which embeds int_tasklet) and fake_bridge
> without calling tasklet_kill(), so a pending or running tasklet may
> access already-freed memory (use-after-free).

How was this found and tested?

thanks,

greg k-h