[ 20.163570][ T183] (udev-worker) (183) used greatest stack depth: 22696 bytes left [ 20.163593][ T183] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 20.163595][ T183] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 183, name: (udev-worker) [ 20.163597][ T183] preempt_count: 2, expected: 0 [ 20.163598][ T183] RCU nest depth: 0, expected: 0 [ 20.163599][ T183] locks held by (udev-worker)/183: 5, last CPU#3: [ 20.163601][ T183] #0: ffffffffaa2027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 20.163613][ T183] #1: ffffffffaa399cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 20.163618][ T183] #2: ffffffffaa399d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 20.163622][ T183] #3: ffffffffaa289660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 20.163626][ T183] #4: ffffffffaa289560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 20.163631][ T183] irq event stamp: 311354 [ 20.163632][ T183] hardirqs last enabled at (311353): [] __down_trylock_console_sem+0x86/0xa0 [ 20.163635][ T183] hardirqs last disabled at (311354): [] console_emit_next_record+0x3f8/0x4f0 [ 20.163638][ T183] softirqs last enabled at (311290): [] netlink_release+0x17b/0xcf0 [ 20.163642][ T183] softirqs last disabled at (311288): [] netlink_release+0xd2/0xcf0 [ 20.163645][ T183] Preemption disabled at: [ 20.163645][ T183] [<0000000000000000>] 0x0 [ 20.163652][ T183] CPU: 3 UID: 0 PID: 183 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 20.163656][ T183] Tainted: [W]=WARN [ 20.163657][ T183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.163659][ T183] Call Trace: [ 20.163660][ T183] [ 20.163662][ T183] dump_stack_lvl+0x6f/0xa0 [ 20.163668][ T183] __might_resched.cold+0x1fe/0x2c1 [ 20.163673][ T183] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 20.163677][ T183] ? __kmalloc_noprof+0xdb/0x760 [ 20.163683][ T183] __kmalloc_noprof+0x443/0x760 [ 20.163686][ T183] ? alloc_buf.isra.0+0x4b/0x260 [ 20.163692][ T183] ? do_raw_spin_unlock+0x59/0x250 [ 20.163695][ T183] alloc_buf.isra.0+0x4b/0x260 [ 20.163699][ T183] put_chars+0x1e1/0x2f0 [ 20.163702][ T183] ? __send_to_port+0x420/0x420 [ 20.163704][ T183] ? printk_get_next_message+0x2fe/0x7d0 [ 20.163707][ T183] ? rcu_read_lock_any_held+0x3c/0x90 [ 20.163711][ T183] ? validate_chain+0x38b/0xc20 [ 20.163715][ T183] hvc_console_print+0x292/0x780 [ 20.163719][ T183] ? __lock_acquire+0x518/0xc20 [ 20.163723][ T183] ? __lock_acquire+0x518/0xc20 [ 20.163727][ T183] ? hvc_write+0x3a0/0x3a0 [ 20.163731][ T183] ? rcu_is_watching+0x16/0xd0 [ 20.163733][ T183] ? lock_acquire+0x13c/0x160 [ 20.163738][ T183] console_emit_next_record+0x252/0x4f0 [ 20.163742][ T183] ? devkmsg_read+0x4e0/0x4e0 [ 20.163746][ T183] ? rcu_is_watching+0x16/0xd0 [ 20.163748][ T183] ? lock_acquire+0x13c/0x160 [ 20.163752][ T183] console_flush_one_record+0x46f/0x710 [ 20.163757][ T183] ? console_emit_next_record+0x4f0/0x4f0 [ 20.163759][ T183] ? __lock_acquire+0x518/0xc20 [ 20.163764][ T183] console_unlock+0xee/0x1f0 [ 20.163767][ T183] ? console_flush_one_record+0x710/0x710 [ 20.163769][ T183] ? rcu_is_watching+0x16/0xd0 [ 20.163771][ T183] ? lock_acquire+0x60/0x160 [ 20.163774][ T183] ? __down_trylock_console_sem+0x5e/0xa0 [ 20.163776][ T183] ? vprintk_emit+0x320/0x3e0 [ 20.163779][ T183] vprintk_emit+0x37c/0x3e0 [ 20.163782][ T183] ? wake_up_klogd_work_func+0x90/0x90 [ 20.163785][ T183] ? __lock_acquire+0x518/0xc20 [ 20.163789][ T183] _printk+0xc7/0x100 [ 20.163793][ T183] ? snapshot_read.cold+0x21/0x21 [ 20.163795][ T183] ? do_raw_spin_lock+0x131/0x280 [ 20.163798][ T183] ? __rwlock_init+0x150/0x150 [ 20.163802][ T183] ? do_raw_spin_lock+0x131/0x280 [ 20.163805][ T183] do_exit.cold+0x82/0x9c [ 20.163808][ T183] ? exit_notify+0x890/0x890 [ 20.163810][ T183] ? __lock_release.isra.0+0x69/0x1a0 [ 20.163813][ T183] ? rcu_is_watching+0x16/0xd0 [ 20.163816][ T183] do_group_exit+0xb8/0x370 [ 20.163819][ T183] __x64_sys_exit_group+0x3c/0x50 [ 20.163821][ T183] x64_sys_call+0x1567/0x1570 [ 20.163823][ T183] do_syscall_64+0xff/0x530 [ 20.163827][ T183] ? exc_page_fault+0xee/0x100 [ 20.163830][ T183] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 20.163832][ T183] RIP: 0033:0x7f2ea90ca1b8 [ 20.163835][ T183] Code: Unable to access opcode bytes at 0x7f2ea90ca18e. [ 20.163836][ T183] RSP: 002b:00007ffdf68bcde8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 20.163838][ T183] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2ea90ca1b8 [ 20.163840][ T183] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 20.163841][ T183] RBP: 00007ffdf68bcf70 R08: 0000562ddefcf9d8 R09: 0000000000000000 [ 20.163841][ T183] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 20.163842][ T183] R13: 00007f2ea8928050 R14: 00007f2ea95fbd9e R15: 0000562ddee52670 [ 20.163850][ T183]