# dmesg | grep -Ei 'rcu.*stall|rcu_preempt|soft lockup|panic|BUG|WARNING'
[    0.000000][    T0] Command line: console=ttyS0 root=/dev/vda1 rootfstype=ext4 rw earlyprintk=serial net.ifnames=0 panic_on_warn=1
[    1.462430][    T0] Kernel command line: earlyprintk=serial net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 ima_policy=tcb nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 binder.debug_mask=0 rcupdate.rcu_expedited=1 rcupdate.rcu_cpu_stall_cputime=1 no_hash_pointers page_owner=on sysctl.vm.nr_hugepages=4 sysctl.vm.nr_overcommit_hugepages=4 secretmem.enable=1 sysctl.max_rcu_stall_to_panic=1 msr.allow_writes=off coredump_filter=0xffff root=/dev/sda console=ttyS0 vsyscall=native numa=fake=2 kvm-intel.nested=1 spec_store_bypass_disable=prctl nopcid vivid.n_devs=64 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=32 rose.rose_ndevs=32 smp.csd_lock_timeout=100000 watchdog_thresh=55 workqueue.watchdog_thresh=140 sysctl.net.core.netdev_unregister_timeout_secs=140 dummy_hcd.num=32 max_loop=32 nbds_max=32 \
[    1.470761][    T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 console=ttyS0 root=/dev/vda1 rootfstype=ext4 rw earlyprintk=serial net.ifnames=0 panic_on_warn=1
[    3.155914][    T0] ** If you see this message and you are not debugging    **
[    3.813298][    T0] rcu:     RCU callback double-/use-after-free debug is enabled.
[    3.814645][    T0] rcu:     RCU debug extended QS entry/exit.
[   17.096163][    T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[   28.566521][    T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[   28.796190][    T1] SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
[   84.486523][    T1] usbcore: registered new interface driver usb_debug
[   84.504286][    T1] usbserial: USB Serial support registered for debug
[  114.419251][    T1] pvrusb2: Debug mask is 31 (0x1f)
[  179.396180][    T1] debug_vm_pgtable: [debug_vm_pgtable         ]: Validating architecture page table helpers
[  185.907359][    T1] Failed to set sysctl parameter 'max_rcu_stall_to_panic=1': parameter not found
[1]+  Terminated                 /tmp/repro