netdev - Re: Net: [DSA]: dsa-loop kernel panic

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Message-ID: <20200430140625.GB76972@lunn.ch>
Date:   Thu, 30 Apr 2020 16:06:25 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Allen <allen.pais@...cle.com>
Cc:     netdev@...r.kernel.org, Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: Net: [DSA]: dsa-loop kernel panic

On Thu, Apr 30, 2020 at 11:54:15AM +0530, Allen wrote:
> Hi,
> 
>   We ran into a kernel panic with dsa-loop.
> Here are the details:
> 
> VM: aarch64 kvm running 5.7.0-rc3+

Hi Allen

Can you reproduce it? If so, could you do:

make net/core/dev.lst

and then show us the listing for __dev_set_rx_mode. The instructions
around 0x48/0xa0 will tell us what structure is a NULL pointer.

For this to work, it is important the build to create the .lst file is
the same as the build which fails. Changing the kernel configuration,
compiler flags etc can change 0x48/0xa0.

Thanks
	Andrew