netdev - Re: [PATCH] i40e: Check for skb->queue

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Message-ID: <1490833890.24891.53.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 29 Mar 2017 17:31:30 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Tushar Dave <tushar.n.dave@...cle.com>
Cc:     jeffrey.t.kirsher@...el.com, intel-wired-lan@...ts.osuosl.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH] i40e: Check for skb->queue_mapping

On Wed, 2017-03-29 at 16:57 -0700, Tushar Dave wrote:
> There are events seen where skb->queue_mapping value is greater than
> vsi->num_queue_pairs. In such cases, vsi->tx_ring becomes invalid
> (null) and xmit results in kernel panic.
> 
> One such event is running netconsole and enabling VF on the same
> device. Or running netconsole and changing number of tx queues via
> ethtool on same device.

Something is wrong then, and must be fixed on these producers.