netdev - Re: [PATCH net] ppp: Fix memory leak in ppp

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Date:   Wed, 25 Sep 2019 13:45:54 +0200 (CEST)
From:   David Miller <davem@...emloft.net>
To:     jeliantsurux@...il.com
Cc:     gnault@...hat.com, paulus@...ba.org, netdev@...r.kernel.org
Subject: Re: [PATCH net] ppp: Fix memory leak in ppp_write

From: Takeshi Misawa <jeliantsurux@...il.com>
Date: Sun, 22 Sep 2019 16:45:31 +0900

> When ppp is closing, __ppp_xmit_process() failed to enqueue skb
> and skb allocated in ppp_write() is leaked.
> 
> syzbot reported :
 ...
> Fix this by freeing skb, if ppp is closing.
> 
> Fixes: 6d066734e9f0 ("ppp: avoid loop in xmit recursion detection code")
> Reported-and-tested-by: syzbot+d9c8bf24e56416d7ce2c@...kaller.appspotmail.com
> Signed-off-by: Takeshi Misawa <jeliantsurux@...il.com>

Applied and queued up for -stable.