Re: [PATCH net-next 3/3] net: stmmac: Introducing support for Page Pool

[Lars Persson]

On Mon, Jul 22, 2019 at 12:18 PM Ilias Apalodimas
<ilias.apalodimas@xxxxxxxxxx> wrote:
>
> On Thu, Jul 18, 2019 at 07:48:04AM +0000, Jose Abreu wrote:
> > From: Jon Hunter <jonathanh@xxxxxxxxxx>
> > Date: Jul/17/2019, 19:58:53 (UTC+00:00)
> >
> > > Let me know if you have any thoughts.
> >
> > Can you try attached patch ?
> >
>
> The log says  someone calls panic() right?
> Can we trye and figure were that happens during the stmmac init phase?
>

The reason for the panic is hidden in this one line of the kernel logs:
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

The init process is killed by SIGSEGV (signal 11 = 0xb).

I would suggest you look for data corruption bugs in the RX path. If
the code is fetched from the NFS mount then a corrupt RX buffer can
trigger a crash in userspace.

/Lars