[ 12.729448][ T85] (udev-worker) (85) used greatest stack depth: 22696 bytes left [ 12.729468][ T85] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.729470][ T85] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 85, name: (udev-worker) [ 12.729472][ T85] preempt_count: 2, expected: 0 [ 12.729473][ T85] RCU nest depth: 0, expected: 0 [ 12.729474][ T85] locks held by (udev-worker)/85: 5, last CPU#2: [ 12.729476][ T85] #0: ffffffffac4027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.729488][ T85] #1: ffffffffac599cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.729494][ T85] #2: ffffffffac599d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.729498][ T85] #3: ffffffffac489660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.729502][ T85] #4: ffffffffac489560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.729505][ T85] irq event stamp: 400022 [ 12.729506][ T85] hardirqs last enabled at (400021): [] __down_trylock_console_sem+0x86/0xa0 [ 12.729509][ T85] hardirqs last disabled at (400022): [] console_emit_next_record+0x3f8/0x4f0 [ 12.729511][ T85] softirqs last enabled at (399964): [] handle_softirqs+0x67c/0x900 [ 12.729513][ T85] softirqs last disabled at (399631): [] __irq_exit_rcu+0x145/0x1c0 [ 12.729516][ T85] Preemption disabled at: [ 12.729517][ T85] [<0000000000000000>] 0x0 [ 12.729524][ T85] CPU: 2 UID: 0 PID: 85 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.729527][ T85] Tainted: [W]=WARN [ 12.729528][ T85] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.729530][ T85] Call Trace: [ 12.729532][ T85] [ 12.729533][ T85] dump_stack_lvl+0x6f/0xa0 [ 12.729539][ T85] __might_resched.cold+0x1fe/0x2c1 [ 12.729544][ T85] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.729548][ T85] ? __kmalloc_noprof+0xdb/0x760 [ 12.729553][ T85] __kmalloc_noprof+0x443/0x760 [ 12.729555][ T85] ? alloc_buf.isra.0+0x4b/0x260 [ 12.729561][ T85] ? do_raw_spin_unlock+0x59/0x250 [ 12.729563][ T85] alloc_buf.isra.0+0x4b/0x260 [ 12.729566][ T85] put_chars+0x1e1/0x2f0 [ 12.729570][ T85] ? __send_to_port+0x420/0x420 [ 12.729571][ T85] ? printk_get_next_message+0x2fe/0x7d0 [ 12.729574][ T85] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.729577][ T85] ? validate_chain+0x38b/0xc20 [ 12.729581][ T85] hvc_console_print+0x292/0x780 [ 12.729584][ T85] ? __lock_acquire+0x518/0xc20 [ 12.729586][ T85] ? __lock_acquire+0x518/0xc20 [ 12.729590][ T85] ? hvc_write+0x3a0/0x3a0 [ 12.729593][ T85] ? rcu_is_watching+0x16/0xd0 [ 12.729596][ T85] ? lock_acquire+0x13c/0x160 [ 12.729600][ T85] console_emit_next_record+0x252/0x4f0 [ 12.729604][ T85] ? devkmsg_read+0x4e0/0x4e0 [ 12.729608][ T85] ? rcu_is_watching+0x16/0xd0 [ 12.729610][ T85] ? lock_acquire+0x13c/0x160 [ 12.729614][ T85] console_flush_one_record+0x46f/0x710 [ 12.729618][ T85] ? console_emit_next_record+0x4f0/0x4f0 [ 12.729620][ T85] ? __lock_acquire+0x518/0xc20 [ 12.729625][ T85] console_unlock+0xee/0x1f0 [ 12.729627][ T85] ? console_flush_one_record+0x710/0x710 [ 12.729629][ T85] ? rcu_is_watching+0x16/0xd0 [ 12.729631][ T85] ? lock_acquire+0x60/0x160 [ 12.729635][ T85] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.729636][ T85] ? vprintk_emit+0x320/0x3e0 [ 12.729639][ T85] vprintk_emit+0x37c/0x3e0 [ 12.729643][ T85] ? wake_up_klogd_work_func+0x90/0x90 [ 12.729646][ T85] ? __lock_acquire+0x518/0xc20 [ 12.729650][ T85] _printk+0xc7/0x100 [ 12.729653][ T85] ? snapshot_read.cold+0x21/0x21 [ 12.729656][ T85] ? do_raw_spin_lock+0x131/0x280 [ 12.729659][ T85] ? __rwlock_init+0x150/0x150 [ 12.729662][ T85] ? do_raw_spin_lock+0x131/0x280 [ 12.729665][ T85] do_exit.cold+0x82/0x9c [ 12.729669][ T85] ? exit_notify+0x890/0x890 [ 12.729670][ T85] ? __lock_release.isra.0+0x69/0x1a0 [ 12.729673][ T85] ? rcu_is_watching+0x16/0xd0 [ 12.729677][ T85] do_group_exit+0xb8/0x370 [ 12.729680][ T85] __x64_sys_exit_group+0x3c/0x50 [ 12.729682][ T85] x64_sys_call+0x1567/0x1570 [ 12.729685][ T85] do_syscall_64+0xff/0x530 [ 12.729688][ T85] ? exc_page_fault+0xee/0x100 [ 12.729691][ T85] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.729693][ T85] RIP: 0033:0x7f7ec0b461b8 [ 12.729696][ T85] Code: Unable to access opcode bytes at 0x7f7ec0b4618e. [ 12.729697][ T85] RSP: 002b:00007ffc79999748 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.729699][ T85] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7ec0b461b8 [ 12.729701][ T85] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.729702][ T85] RBP: 00007ffc799998d0 R08: 0000564657db4668 R09: 0000000000000000 [ 12.729703][ T85] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.729703][ T85] R13: 00007f7ec03a4050 R14: 00007f7ec1077d9e R15: 0000564657db33d0 [ 12.729711][ T85]