linux-kernel - Re: net: sleeping function called from invalid context in net_enable

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Message-ID: <1488399119.9415.304.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 01 Mar 2017 12:11:59 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net: sleeping function called from invalid context in
 net_enable_timestamp

On Wed, 2017-03-01 at 12:07 -0800, Eric Dumazet wrote:
> On Wed, 2017-03-01 at 11:59 -0800, Eric Dumazet wrote:
> > On Wed, Mar 1, 2017 at 11:51 AM, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> > >
> > > Hello,
> > >
> > > I've got the following report while running syzkaller fuzzer on
> > > e5d56efc97f8240d0b5d66c03949382b6d7e5570
> > 
> > 
> > 
> > Right, a listener is playing fool games.
> > 
> > We need to use a work queue for all net_enable_timestamp() invocations
> 
> Something like :

We need something better, I will send a patch keeping good performance
for this jump label thing.