[ 15.984409][ T199] (udev-worker) (199) used greatest stack depth: 22696 bytes left [ 15.984910][ T199] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 15.984913][ T199] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 199, name: (udev-worker) [ 15.984914][ T199] preempt_count: 2, expected: 0 [ 15.984915][ T199] RCU nest depth: 0, expected: 0 [ 15.984916][ T199] locks held by (udev-worker)/199: 5, last CPU#0: [ 15.984918][ T199] #0: fffffffface167b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 15.984930][ T199] #1: ffffffffacf7ddc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 15.984935][ T199] #2: ffffffffacf7de38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 15.984939][ T199] #3: fffffffface9d760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 15.984943][ T199] #4: fffffffface9d660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x1df/0x4c0 [ 15.984947][ T199] irq event stamp: 71816 [ 15.984948][ T199] hardirqs last enabled at (71815): [] __down_trylock_console_sem+0x86/0xa0 [ 15.984951][ T199] hardirqs last disabled at (71816): [] console_emit_next_record+0x3d4/0x4c0 [ 15.984953][ T199] softirqs last enabled at (71812): [] handle_softirqs+0x67c/0x900 [ 15.984956][ T199] softirqs last disabled at (70603): [] __irq_exit_rcu+0x145/0x1c0 [ 15.984958][ T199] Preemption disabled at: [ 15.984959][ T199] [<0000000000000000>] 0x0 [ 15.984967][ T199] CPU: 0 UID: 0 PID: 199 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 15.984971][ T199] Tainted: [W]=WARN [ 15.984972][ T199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.984973][ T199] Call Trace: [ 15.984975][ T199] [ 15.984977][ T199] dump_stack_lvl+0x6f/0xa0 [ 15.984984][ T199] __might_resched.cold+0x1fe/0x2c1 [ 15.984988][ T199] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 15.984992][ T199] ? __kmalloc_noprof+0xdb/0x760 [ 15.984997][ T199] __kmalloc_noprof+0x443/0x760 [ 15.984999][ T199] ? alloc_buf.isra.0+0x4b/0x260 [ 15.985006][ T199] ? do_raw_spin_unlock+0x59/0x250 [ 15.985009][ T199] alloc_buf.isra.0+0x4b/0x260 [ 15.985013][ T199] put_chars+0x1e1/0x2f0 [ 15.985015][ T199] ? __send_to_port+0x420/0x420 [ 15.985016][ T199] ? rcu_lockdep_current_cpu_online+0x3f/0x1b0 [ 15.985020][ T199] ? validate_chain+0x38b/0xc20 [ 15.985026][ T199] hvc_console_print+0x292/0x780 [ 15.985033][ T199] ? hvc_write+0x3a0/0x3a0 [ 15.985036][ T199] ? rcu_is_watching+0x16/0xd0 [ 15.985038][ T199] ? lock_acquire+0x13c/0x160 [ 15.985042][ T199] console_emit_next_record+0x22f/0x4c0 [ 15.985046][ T199] ? devkmsg_read+0x4b0/0x4b0 [ 15.985048][ T199] ? console_flush_one_record+0x106/0x710 [ 15.985051][ T199] ? rcu_is_watching+0x16/0xd0 [ 15.985053][ T199] ? lock_acquire+0x13c/0x160 [ 15.985057][ T199] console_flush_one_record+0x46f/0x710 [ 15.985061][ T199] ? console_emit_next_record+0x4c0/0x4c0 [ 15.985063][ T199] ? __lock_acquire+0x518/0xc20 [ 15.985069][ T199] console_unlock+0xee/0x1f0 [ 15.985071][ T199] ? console_flush_one_record+0x710/0x710 [ 15.985073][ T199] ? rcu_is_watching+0x16/0xd0 [ 15.985075][ T199] ? lock_acquire+0xe0/0x160 [ 15.985079][ T199] ? __down_trylock_console_sem+0x5e/0xa0 [ 15.985081][ T199] ? vprintk_emit+0x320/0x3e0 [ 15.985083][ T199] vprintk_emit+0x37c/0x3e0 [ 15.985086][ T199] ? wake_up_klogd_work_func+0x90/0x90 [ 15.985089][ T199] ? __lock_acquire+0x518/0xc20 [ 15.985093][ T199] _printk+0xc7/0x100 [ 15.985096][ T199] ? snapshot_read.cold+0x21/0x21 [ 15.985099][ T199] ? do_raw_spin_lock+0x131/0x280 [ 15.985102][ T199] ? __rwlock_init+0x150/0x150 [ 15.985106][ T199] ? do_raw_spin_lock+0x131/0x280 [ 15.985109][ T199] do_exit.cold+0x82/0x9c [ 15.985112][ T199] ? exit_notify+0x890/0x890 [ 15.985113][ T199] ? __lock_release.isra.0+0x69/0x1a0 [ 15.985116][ T199] ? rcu_is_watching+0x16/0xd0 [ 15.985120][ T199] do_group_exit+0xb8/0x370 [ 15.985123][ T199] __x64_sys_exit_group+0x3c/0x50 [ 15.985125][ T199] x64_sys_call+0x1567/0x1570 [ 15.985127][ T199] do_syscall_64+0xff/0x530 [ 15.985131][ T199] ? exc_page_fault+0xee/0x100 [ 15.985134][ T199] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.985137][ T199] RIP: 0033:0x7f5642f931b8 [ 15.985139][ T199] Code: Unable to access opcode bytes at 0x7f5642f9318e. [ 15.985140][ T199] RSP: 002b:00007ffdf63a2218 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 15.985143][ T199] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5642f931b8 [ 15.985144][ T199] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 15.985145][ T199] RBP: 00007ffdf63a23a0 R08: 00005627b8087d28 R09: 0000000000000000 [ 15.985146][ T199] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 15.985146][ T199] R13: 00007f56427f1050 R14: 00007f56434c4d9e R15: 00005627b7efda80 [ 15.985153][ T199]