From: Hyunwoo Kim <imv4bel@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Lubomir Rintel <lkundrak@v3.sk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, imv4bel@gmail.com
Subject: Re: [PATCH] char: pcmcia: scr24x_cs: Fix use-after-free in scr24x_fops
Date: Fri, 16 Sep 2022 01:11:24 -0700 [thread overview]
Message-ID: <20220916081124.GA189795@ubuntu> (raw)
In-Reply-To: <d28d59c1-1ed0-422b-b749-0082de05e7ee@www.fastmail.com>
On Fri, Sep 16, 2022 at 08:59:44AM +0200, Arnd Bergmann wrote:
> This appears to introduce a new use-after-free, when the kref_put()
> frees the 'dev' structure and you unlock the mutex in that structure
> afterwards.
yes. Every patch I've submitted has this issue.
I'll replace the mutex with a global variable and submit a v2 patch that fixes other issues.
prev parent reply other threads:[~2022-09-16 8:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-16 5:00 [PATCH] char: pcmcia: scr24x_cs: Fix use-after-free in scr24x_fops Hyunwoo Kim
2022-09-16 6:59 ` Arnd Bergmann
2022-09-16 8:11 ` Hyunwoo Kim [this message]
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