[ 16.102544][ T84] (udev-worker) (84) used greatest stack depth: 22696 bytes left [ 16.102559][ T84] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 16.102561][ T84] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 84, name: (udev-worker) [ 16.102563][ T84] preempt_count: 2, expected: 0 [ 16.102563][ T84] RCU nest depth: 0, expected: 0 [ 16.102564][ T84] locks held by (udev-worker)/84: 5, last CPU#2: [ 16.102567][ T84] #0: ffffffffa86027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 16.102580][ T84] #1: ffffffffa8799cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 16.102585][ T84] #2: ffffffffa8799d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 16.102589][ T84] #3: ffffffffa8689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 16.102592][ T84] #4: ffffffffa8689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 16.102596][ T84] irq event stamp: 840494 [ 16.102597][ T84] hardirqs last enabled at (840493): [] __down_trylock_console_sem+0x86/0xa0 [ 16.102599][ T84] hardirqs last disabled at (840494): [] console_emit_next_record+0x3f8/0x4f0 [ 16.102601][ T84] softirqs last enabled at (840428): [] netlink_release+0x17b/0xcf0 [ 16.102607][ T84] softirqs last disabled at (840426): [] netlink_release+0xd2/0xcf0 [ 16.102610][ T84] Preemption disabled at: [ 16.102610][ T84] [<0000000000000000>] 0x0 [ 16.102617][ T84] CPU: 2 UID: 0 PID: 84 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 16.102620][ T84] Tainted: [W]=WARN [ 16.102621][ T84] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.102623][ T84] Call Trace: [ 16.102625][ T84] [ 16.102626][ T84] dump_stack_lvl+0x6f/0xa0 [ 16.102632][ T84] __might_resched.cold+0x1fe/0x2c1 [ 16.102637][ T84] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 16.102640][ T84] ? __kmalloc_noprof+0xdb/0x760 [ 16.102645][ T84] __kmalloc_noprof+0x443/0x760 [ 16.102647][ T84] ? alloc_buf.isra.0+0x4b/0x260 [ 16.102653][ T84] ? do_raw_spin_unlock+0x59/0x250 [ 16.102655][ T84] alloc_buf.isra.0+0x4b/0x260 [ 16.102658][ T84] put_chars+0x1e1/0x2f0 [ 16.102661][ T84] ? __send_to_port+0x420/0x420 [ 16.102662][ T84] ? printk_get_next_message+0x2fe/0x7d0 [ 16.102665][ T84] ? rcu_read_lock_any_held+0x3c/0x90 [ 16.102668][ T84] ? validate_chain+0x38b/0xc20 [ 16.102672][ T84] hvc_console_print+0x292/0x780 [ 16.102675][ T84] ? __lock_acquire+0x518/0xc20 [ 16.102676][ T84] ? __lock_acquire+0x518/0xc20 [ 16.102680][ T84] ? hvc_write+0x3a0/0x3a0 [ 16.102683][ T84] ? rcu_is_watching+0x16/0xd0 [ 16.102686][ T84] ? lock_acquire+0x13c/0x160 [ 16.102690][ T84] console_emit_next_record+0x252/0x4f0 [ 16.102693][ T84] ? devkmsg_read+0x4e0/0x4e0 [ 16.102697][ T84] ? rcu_is_watching+0x16/0xd0 [ 16.102699][ T84] ? lock_acquire+0x13c/0x160 [ 16.102703][ T84] console_flush_one_record+0x46f/0x710 [ 16.102707][ T84] ? console_emit_next_record+0x4f0/0x4f0 [ 16.102708][ T84] ? __lock_acquire+0x518/0xc20 [ 16.102713][ T84] console_unlock+0xee/0x1f0 [ 16.102716][ T84] ? console_flush_one_record+0x710/0x710 [ 16.102717][ T84] ? rcu_is_watching+0x16/0xd0 [ 16.102719][ T84] ? lock_acquire+0x60/0x160 [ 16.102722][ T84] ? __down_trylock_console_sem+0x5e/0xa0 [ 16.102724][ T84] ? vprintk_emit+0x320/0x3e0 [ 16.102727][ T84] vprintk_emit+0x37c/0x3e0 [ 16.102731][ T84] ? wake_up_klogd_work_func+0x90/0x90 [ 16.102734][ T84] ? __lock_acquire+0x518/0xc20 [ 16.102737][ T84] _printk+0xc7/0x100 [ 16.102741][ T84] ? snapshot_read.cold+0x21/0x21 [ 16.102744][ T84] ? do_raw_spin_lock+0x131/0x280 [ 16.102746][ T84] ? __rwlock_init+0x150/0x150 [ 16.102749][ T84] ? do_raw_spin_lock+0x131/0x280 [ 16.102752][ T84] do_exit.cold+0x82/0x9c [ 16.102755][ T84] ? exit_notify+0x890/0x890 [ 16.102757][ T84] ? __lock_release.isra.0+0x69/0x1a0 [ 16.102760][ T84] ? rcu_is_watching+0x16/0xd0 [ 16.102763][ T84] do_group_exit+0xb8/0x370 [ 16.102767][ T84] __x64_sys_exit_group+0x3c/0x50 [ 16.102769][ T84] x64_sys_call+0x1567/0x1570 [ 16.102771][ T84] do_syscall_64+0xff/0x530 [ 16.102774][ T84] ? irq_exit_rcu+0x1a/0x30 [ 16.102778][ T84] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 16.102780][ T84] RIP: 0033:0x7f7ef80eb1b8 [ 16.102782][ T84] Code: Unable to access opcode bytes at 0x7f7ef80eb18e. [ 16.102783][ T84] RSP: 002b:00007ffd3261c958 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 16.102785][ T84] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7ef80eb1b8 [ 16.102787][ T84] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 16.102788][ T84] RBP: 00007ffd3261cae0 R08: 000055cfb06bfbd8 R09: 0000000000000000 [ 16.102788][ T84] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 16.102789][ T84] R13: 00007f7ef7949050 R14: 00007f7ef861cd9e R15: 000055cfb0564690 [ 16.102796][ T84]