From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>, edumazet@google.com
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com
Subject: Re: [PATCH net] tcp/dccp: fix lockdep issue when SYN is backlogged
Date: Tue, 2 Oct 2018 11:25:37 -0700 [thread overview]
Message-ID: <f44b17dc-2efe-5925-36d2-44512ce803cc@gmail.com> (raw)
In-Reply-To: <20181001.154308.1092275550794942572.davem@davemloft.net>
On 10/01/2018 03:43 PM, David Miller wrote:
> From: Eric Dumazet <edumazet@google.com>
> Date: Mon, 1 Oct 2018 15:02:26 -0700
>> This patch extends what I did in commit 449809a66c1d ("tcp/dccp:
>> block BH for SYN processing") by adding an extra rcu_read_{lock|unlock}
>> pair in the paths that might be taken when processing SYN from
>> socket backlog (thus possibly in process context)
>>
>> Fixes: 06f877d613be ("tcp/dccp: fix other lockdep splats accessing ireq_opt")
>> Signed-off-by: Eric Dumazet <edumazet@google.com>
>> Reported-by: syzbot <syzkaller@googlegroups.com>
>
> Applied and queued up for -stable, thanks Eric.
>
This needs a followup, timers do not imply rcu_read_lock() :/
I will send a patch, sorry for not having caught this earlier.
prev parent reply other threads:[~2018-10-03 1:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 22:02 [PATCH net] tcp/dccp: fix lockdep issue when SYN is backlogged Eric Dumazet
2018-10-01 22:43 ` David Miller
2018-10-02 18:25 ` Eric Dumazet [this message]
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