netdev - Re: [PATCH net] inet_diag: validate INET_DIAG_REQ

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Date:   Mon, 21 Sep 2020 17:39:32 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     edumazet@...gle.com
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com, pabeni@...hat.com,
        cpaasch@...le.com, mathew.j.martineau@...ux.intel.com
Subject: Re: [PATCH net] inet_diag: validate INET_DIAG_REQ_PROTOCOL
 attribute

From: Eric Dumazet <edumazet@...gle.com>
Date: Mon, 21 Sep 2020 07:27:20 -0700

> User space could send an invalid INET_DIAG_REQ_PROTOCOL attribute
> as caught by syzbot.
> 
> BUG: KMSAN: uninit-value in inet_diag_lock_handler net/ipv4/inet_diag.c:55 [inline]
> BUG: KMSAN: uninit-value in __inet_diag_dump+0x58c/0x720 net/ipv4/inet_diag.c:1147
> CPU: 0 PID: 8505 Comm: syz-executor174 Not tainted 5.9.0-rc4-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ...
> Fixes: 3f935c75eb52 ("inet_diag: support for wider protocol numbers")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied, thanks Eric.