netdev - Re: [PATCH] isdn: i4l: isdn_tty: Fix some concurrency double-free bugs

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Date:   Fri, 11 Jan 2019 17:57:11 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     baijiaju1990@...il.com
Cc:     isdn@...ux-pingi.de, viro@...iv.linux.org.uk, linux@...ck-us.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] isdn: i4l: isdn_tty: Fix some concurrency double-free
 bugs

From: Jia-Ju Bai <baijiaju1990@...il.com>
Date: Tue,  8 Jan 2019 21:04:48 +0800

> The functions isdn_tty_tiocmset() and isdn_tty_set_termios() may be
> concurrently executed.
 ...
> These possible bugs are found by a static tool written by myself and 
> my manual code review.
> 
> To fix these possible bugs, the mutex lock "modem_info_mutex" used in
> isdn_tty_tiocmset() is added in isdn_tty_set_termios().
> 
> Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>

Applied.