netdev - Re: NULL pointer dereference in net_rx

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Message-ID: <20120113164928.GA4418@electric-eye.fr.zoreil.com>
Date:	Fri, 13 Jan 2012 17:49:28 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Bart Van Assche <bvanassche@....org>
Cc:	netdev@...r.kernel.org
Subject: Re: NULL pointer dereference in net_rx_action

Bart Van Assche <bvanassche@....org> :
[...]
> If I send enough data via netconsole and an Ethernet interface to a
> remote system, sooner or later a NULL pointer dereference is triggered
> in net_rx_action(). I can reproduce this with both 3.1.8 and 3.2.0. Is
> this a known issue ?

I have not seen where netpoll would avoid calling napi methods from bh
disabled context so it is probably "known". You may try to turn the 
bh disabling locks in skge into irq saving ones. Event if (big if) it
works, it will be more a local workaround more than a real solution.

-- 
Ueimor
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