Hello, Op zo 14 jun. 2020 om 20:29 schreef Cong Wang <xiyou.wangc...@gmail.com>: > > Hello, > > On Sun, Jun 14, 2020 at 5:39 AM Daniël Sonck <dsonc...@gmail.com> wrote: > > > > Hello, > > > > I found on the archive that this bug I encountered also happened to > > others. I too have a very similar stacktrace. The issue I'm > > experiencing is: > > > > Whenever I fully boot my cluster, in some time, the host crashes with > > the __cgroup_bpf_run_filter_skb NULL pointer dereference. This has > > been sporadic enough before not to cause real issues. However, as of > > lately, the bug is triggered much more frequently. I've changed my > > server hardware so I could capture serial output in order to get the > > trace. This trace looked very similar as reported by Lu Fengqi. As it > > currently stands, I cannot run the cluster as it's almost instantly > > crashing the host. > > This has been reported for multiple times. Are you able to test the > attached patch? And let me know if everything goes fine with it.
I will try out the patch. Since the host reliably crashed each time as I booted up the cluster VMs I will be able to tell whether it has any positive effect. > > I suspect we may still leak some cgroup refcnt even with the patch, > but it might be much harder to trigger with this patch applied. Currently applying the patch to the kernel and compiling so I should know in a few hours > > Thanks.
