netdev - Re: [PATCH net] packet: avoid panic in packet

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Date:   Sat, 21 Oct 2017 01:53:20 +0100 (WEST)
From:   David Miller <davem@...emloft.net>
To:     eric.dumazet@...il.com
Cc:     netdev@...r.kernel.org, willemb@...gle.com, edumazet@...gle.com
Subject: Re: [PATCH net] packet: avoid panic in packet_getsockopt()

From: David Miller <davem@...emloft.net>
Date: Sat, 21 Oct 2017 01:50:08 +0100 (WEST)

> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Wed, 18 Oct 2017 15:08:24 -0700
> 
>> From: Eric Dumazet <edumazet@...gle.com>
>> 
>> syzkaller got crashes in packet_getsockopt() processing
>> PACKET_ROLLOVER_STATS command while another thread was managing
>> to change po->rollover
>> 
>> Using RCU will fix this bug. We might later add proper RCU annotations
>> for sparse sake.
>> 
>> Fixes: a9b6391814d5 ("packet: rollover statistics")
>> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> 
> Applied and queued up for -stable, but:
> 
>> Willem de Bruijn <willemb@...gle.com>
> 
> I didn't know what kind of tag you intended to use here for Willem
> so just deleted the line.

I just noticed 'v2' of this patch and replaced it in time before I
pushed out :-)