"WARNING: CPU: X PID: Y at kernel/rcutree.c:2221 rcu_process_callbacks+0x50c/0x570" followed by the crash Raw [33298938.006620] ---[ cut here ]--- [33298938.007790] WARNING: CPU: 4 PID: 0 at kernel/rcutree.c:2221 rcu_process_callbacks+0x50c/0x570 [33298938.007792] Modules linked...