netdev - Re: [Patch net] kcm: return immediately after copy_from

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Message-Id: <20170324.131437.338286643441645097.davem@davemloft.net>
Date:   Fri, 24 Mar 2017 13:14:37 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     xiyou.wangcong@...il.com
Cc:     netdev@...r.kernel.org, tom@...bertland.com
Subject: Re: [Patch net] kcm: return immediately after copy_from_user()
 failure

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Thu, 23 Mar 2017 11:03:31 -0700

> There is no reason to continue after a copy_from_user()
> failure.
> 
> Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module")
> Cc: Tom Herbert <tom@...bertland.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

Applied and queued up for -stable and this bug could make the kernel
use uninitialized on-stack data.