linux-kernel - Re: [PATCH v2] net: hso: fix null-ptr-deref during tty device unregistration

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Message-Id: <161783402883.11274.17007849600420610230.git-patchwork-notify@kernel.org>
Date:   Wed, 07 Apr 2021 22:20:28 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Anirudh Rayabharam <mail@...rudhrb.com>
Cc:     davem@...emloft.net, kuba@...nel.org, oneukum@...e.com,
        gregkh@...uxfoundation.org, geert@...ux-m68k.org,
        zhengyongjun3@...wei.com, rkovhaev@...il.com, kernel@...il.dk,
        jgarzik@...hat.com, alan@...rguk.ukuu.org.uk,
        syzbot+c49fe6089f295a05e6f8@...kaller.appspotmail.com,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: hso: fix null-ptr-deref during tty device
 unregistration

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Wed,  7 Apr 2021 22:57:22 +0530 you wrote:
> Multiple ttys try to claim the same the minor number causing a double
> unregistration of the same device. The first unregistration succeeds
> but the next one results in a null-ptr-deref.
> 
> The get_free_serial_index() function returns an available minor number
> but doesn't assign it immediately. The assignment is done by the caller
> later. But before this assignment, calls to get_free_serial_index()
> would return the same minor number.
> 
> [...]

Here is the summary with links:
  - [v2] net: hso: fix null-ptr-deref during tty device unregistration
    https://git.kernel.org/netdev/net/c/8a12f8836145

You are awesome, thank you!
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