[ 14.238618][ T179] (udev-worker) (179) used greatest stack depth: 22696 bytes left [ 14.238639][ T179] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 14.238641][ T179] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 179, name: (udev-worker) [ 14.238642][ T179] preempt_count: 2, expected: 0 [ 14.238643][ T179] RCU nest depth: 0, expected: 0 [ 14.238644][ T179] locks held by (udev-worker)/179: 5, last CPU#2: [ 14.238647][ T179] #0: ffffffff96c027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 14.238661][ T179] #1: ffffffff96d99cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 14.238666][ T179] #2: ffffffff96d99d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 14.238671][ T179] #3: ffffffff96c89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 14.238674][ T179] #4: ffffffff96c89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 14.238678][ T179] irq event stamp: 154634 [ 14.238679][ T179] hardirqs last enabled at (154633): [] __down_trylock_console_sem+0x86/0xa0 [ 14.238682][ T179] hardirqs last disabled at (154634): [] console_emit_next_record+0x3f8/0x4f0 [ 14.238685][ T179] softirqs last enabled at (154628): [] handle_softirqs+0x67c/0x900 [ 14.238687][ T179] softirqs last disabled at (154569): [] __irq_exit_rcu+0x145/0x1c0 [ 14.238689][ T179] Preemption disabled at: [ 14.238690][ T179] [<0000000000000000>] 0x0 [ 14.238697][ T179] CPU: 2 UID: 0 PID: 179 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 14.238700][ T179] Tainted: [W]=WARN [ 14.238701][ T179] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.238703][ T179] Call Trace: [ 14.238704][ T179] [ 14.238706][ T179] dump_stack_lvl+0x6f/0xa0 [ 14.238712][ T179] __might_resched.cold+0x1fe/0x2c1 [ 14.238717][ T179] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 14.238721][ T179] ? __kmalloc_noprof+0xdb/0x760 [ 14.238727][ T179] __kmalloc_noprof+0x443/0x760 [ 14.238729][ T179] ? alloc_buf.isra.0+0x4b/0x260 [ 14.238735][ T179] ? do_raw_spin_unlock+0x59/0x250 [ 14.238738][ T179] alloc_buf.isra.0+0x4b/0x260 [ 14.238742][ T179] put_chars+0x1e1/0x2f0 [ 14.238745][ T179] ? __send_to_port+0x420/0x420 [ 14.238747][ T179] ? printk_get_next_message+0x2fe/0x7d0 [ 14.238750][ T179] ? rcu_read_lock_any_held+0x3c/0x90 [ 14.238754][ T179] ? validate_chain+0x38b/0xc20 [ 14.238758][ T179] hvc_console_print+0x292/0x780 [ 14.238761][ T179] ? __lock_acquire+0x518/0xc20 [ 14.238763][ T179] ? __lock_acquire+0x518/0xc20 [ 14.238767][ T179] ? hvc_write+0x3a0/0x3a0 [ 14.238771][ T179] ? rcu_is_watching+0x16/0xd0 [ 14.238773][ T179] ? lock_acquire+0x13c/0x160 [ 14.238777][ T179] console_emit_next_record+0x252/0x4f0 [ 14.238781][ T179] ? devkmsg_read+0x4e0/0x4e0 [ 14.238787][ T179] ? rcu_is_watching+0x16/0xd0 [ 14.238790][ T179] ? lock_acquire+0x13c/0x160 [ 14.238795][ T179] console_flush_one_record+0x46f/0x710 [ 14.238800][ T179] ? console_emit_next_record+0x4f0/0x4f0 [ 14.238802][ T179] ? __lock_acquire+0x518/0xc20 [ 14.238807][ T179] console_unlock+0xee/0x1f0 [ 14.238810][ T179] ? console_flush_one_record+0x710/0x710 [ 14.238812][ T179] ? rcu_is_watching+0x16/0xd0 [ 14.238814][ T179] ? lock_acquire+0x60/0x160 [ 14.238818][ T179] ? __down_trylock_console_sem+0x5e/0xa0 [ 14.238820][ T179] ? vprintk_emit+0x320/0x3e0 [ 14.238822][ T179] vprintk_emit+0x37c/0x3e0 [ 14.238826][ T179] ? wake_up_klogd_work_func+0x90/0x90 [ 14.238829][ T179] ? __lock_acquire+0x518/0xc20 [ 14.238832][ T179] _printk+0xc7/0x100 [ 14.238836][ T179] ? snapshot_read.cold+0x21/0x21 [ 14.238839][ T179] ? do_raw_spin_lock+0x131/0x280 [ 14.238841][ T179] ? __rwlock_init+0x150/0x150 [ 14.238845][ T179] ? do_raw_spin_lock+0x131/0x280 [ 14.238848][ T179] do_exit.cold+0x82/0x9c [ 14.238852][ T179] ? exit_notify+0x890/0x890 [ 14.238853][ T179] ? __lock_release.isra.0+0x69/0x1a0 [ 14.238856][ T179] ? rcu_is_watching+0x16/0xd0 [ 14.238860][ T179] do_group_exit+0xb8/0x370 [ 14.238863][ T179] __x64_sys_exit_group+0x3c/0x50 [ 14.238864][ T179] x64_sys_call+0x1567/0x1570 [ 14.238867][ T179] do_syscall_64+0xff/0x530 [ 14.238871][ T179] ? exc_page_fault+0xee/0x100 [ 14.238874][ T179] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 14.238876][ T179] RIP: 0033:0x7f352f78c1b8 [ 14.238879][ T179] Code: Unable to access opcode bytes at 0x7f352f78c18e. [ 14.238880][ T179] RSP: 002b:00007ffe642acbd8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 14.238882][ T179] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f352f78c1b8 [ 14.238884][ T179] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 14.238885][ T179] RBP: 00007ffe642acd60 R08: 000055b46bc6b508 R09: 0000000000000000 [ 14.238885][ T179] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 14.238886][ T179] R13: 00007f352efea050 R14: 00007f352fcbdd9e R15: 000055b46bc5e050 [ 14.238893][ T179]