Bug#990642: linux-image-4.19.0-17-amd64: kernel panic on xen dom0 with Broadcom Limited NetXtreme II BCM5709

[Salvatore Bonaccorso <carnil@debian.org>]

Hi,

On Thu, Aug 05, 2021 at 01:58:50PM +0200, spi@gmxpro.de wrote:
> 
> In preparation for the bug report for upstream I did some more
> investigation.
> 
> The kernel panic also occurs without bonding interfaces but needs much
> more time to happen. With a bonding interface it happens within some
> seconds. Without bonding interfaces it needs like a minute with the
> network discovery being re-launched for 2 or 3 times. The kernel panic
> is still the same about the bnx2 driver.
> 
> In the constellation without a bonding interface the kernel panic only
> occurs if
> - opnsense as a domU is running (this domU bounds all bridged interfaces
> as default gateway for all networks)
> - sysctl parameter net.bridge.bridge-nf-call-ip6tables is set to 0.
> 
> If both conditions are not met no kernel panic oaccurs.
> 
> Other IPv6 related sysctl parameters are set on dom0 like
> net.ipv6.conf.all.disable_ipv6 = 1
> net.ipv6.conf.default.disable_ipv6 = 1
> net.ipv6.conf.lo.disable_ipv6 = 1
> 
> 
> The layer2-iptables settings are
> net.bridge.bridge-nf-call-ip6tables = 0 ***
> 
> 
> net.bridge.bridge-nf-call-iptables = 1
> 
> 
> net.bridge.bridge-nf-call-arptables = 0
> 
> 
> 
> 
> As said, if I don't set the one marked with *** to 0 there is no kernel
> panic.
> 
> I wonder if this still is a kernel issue but still wouldn't expect a
> kernel panic to happen.

Did you got any response on your reporting upstream?

Regards,
Salvatore