netdev - Re: [PATCH net] l2tp: fix infoleak in l2tp_ip6

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Message-Id: <20190313.142025.358078188933276996.davem@davemloft.net>
Date:   Wed, 13 Mar 2019 14:20:25 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com,
        syzkaller@...glegroups.com
Subject: Re: [PATCH net] l2tp: fix infoleak in l2tp_ip6_recvmsg()

From: Eric Dumazet <edumazet@...gle.com>
Date: Tue, 12 Mar 2019 06:50:11 -0700

> Back in 2013 Hannes took care of most of such leaks in commit
> bceaa90240b6 ("inet: prevent leakage of uninitialized memory to user in recv syscalls")
> 
> But the bug in l2tp_ip6_recvmsg() has not been fixed.
> 
> syzbot report :
 ...
> Fixes: a32e0eec7042 ("l2tp: introduce L2TPv3 IP encapsulation support for IPv6")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied and queued up for -stable, thanks Eric.