On Tue, 31 May 2022, Mikulas Patocka wrote: > > So, right now I'm somehow lost how I can help. > > If you don't know what causes it, I can try to add some debug printks into > the kernel and analyze it when I have time. > > > You could you send me your .config, then I'll check locally. > > Please also try a "make oldconfig" with your .config so that the options don't have any leftovers. > > I uploaded my config here: > https://people.redhat.com/~mpatocka/testcases/parisc-config-5.18.txt CONFIG_SCHED_MC is causing it. It's on in my config, off in your config. If I turn it off, the crash goes away. The crash happens in "sd_init": sd_span = sched_domain_span(sd); sets sd_span to an empty cpumask. sd_id = cpumask_first(sd_span); sets sd_id to 4 (it is out of range because CONFIG_NR_CPUS=4) sd->shared = *per_cpu_ptr(sdd->sds, sd_id); sets sd->shared to NULL atomic_inc(&sd->shared->ref); crashes without printing anything Mikulas
