[ 16.248191][ T183] (udev-worker) (183) used greatest stack depth: 22696 bytes left [ 16.248213][ T183] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 16.248215][ T183] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 183, name: (udev-worker) [ 16.248217][ T183] preempt_count: 2, expected: 0 [ 16.248218][ T183] RCU nest depth: 0, expected: 0 [ 16.248218][ T183] locks held by (udev-worker)/183: 5, last CPU#3: [ 16.248221][ T183] #0: ffffffffb26027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 16.248233][ T183] #1: ffffffffb2799cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 16.248238][ T183] #2: ffffffffb2799d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 16.248242][ T183] #3: ffffffffb2689660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 16.248246][ T183] #4: ffffffffb2689560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 16.248250][ T183] irq event stamp: 146848 [ 16.248251][ T183] hardirqs last enabled at (146847): [] __down_trylock_console_sem+0x86/0xa0 [ 16.248254][ T183] hardirqs last disabled at (146848): [] console_emit_next_record+0x3f8/0x4f0 [ 16.248257][ T183] softirqs last enabled at (146784): [] netlink_release+0x17b/0xcf0 [ 16.248261][ T183] softirqs last disabled at (146782): [] netlink_release+0xd2/0xcf0 [ 16.248264][ T183] Preemption disabled at: [ 16.248264][ T183] [<0000000000000000>] 0x0 [ 16.248271][ T183] CPU: 3 UID: 0 PID: 183 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 16.248275][ T183] Tainted: [W]=WARN [ 16.248276][ T183] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.248278][ T183] Call Trace: [ 16.248279][ T183] [ 16.248281][ T183] dump_stack_lvl+0x6f/0xa0 [ 16.248287][ T183] __might_resched.cold+0x1fe/0x2c1 [ 16.248292][ T183] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 16.248298][ T183] ? __kmalloc_noprof+0xdb/0x760 [ 16.248306][ T183] __kmalloc_noprof+0x443/0x760 [ 16.248309][ T183] ? alloc_buf.isra.0+0x4b/0x260 [ 16.248315][ T183] ? do_raw_spin_unlock+0x59/0x250 [ 16.248318][ T183] alloc_buf.isra.0+0x4b/0x260 [ 16.248322][ T183] put_chars+0x1e1/0x2f0 [ 16.248325][ T183] ? __send_to_port+0x420/0x420 [ 16.248327][ T183] ? printk_get_next_message+0x2fe/0x7d0 [ 16.248331][ T183] ? rcu_read_lock_any_held+0x3c/0x90 [ 16.248334][ T183] ? validate_chain+0x38b/0xc20 [ 16.248339][ T183] hvc_console_print+0x292/0x780 [ 16.248342][ T183] ? __lock_acquire+0x518/0xc20 [ 16.248344][ T183] ? __lock_acquire+0x518/0xc20 [ 16.248348][ T183] ? hvc_write+0x3a0/0x3a0 [ 16.248352][ T183] ? rcu_is_watching+0x16/0xd0 [ 16.248354][ T183] ? lock_acquire+0x13c/0x160 [ 16.248358][ T183] console_emit_next_record+0x252/0x4f0 [ 16.248362][ T183] ? devkmsg_read+0x4e0/0x4e0 [ 16.248367][ T183] ? rcu_is_watching+0x16/0xd0 [ 16.248369][ T183] ? lock_acquire+0x13c/0x160 [ 16.248373][ T183] console_flush_one_record+0x46f/0x710 [ 16.248377][ T183] ? console_emit_next_record+0x4f0/0x4f0 [ 16.248379][ T183] ? __lock_acquire+0x518/0xc20 [ 16.248385][ T183] console_unlock+0xee/0x1f0 [ 16.248388][ T183] ? console_flush_one_record+0x710/0x710 [ 16.248390][ T183] ? rcu_is_watching+0x16/0xd0 [ 16.248391][ T183] ? lock_acquire+0x60/0x160 [ 16.248395][ T183] ? __down_trylock_console_sem+0x5e/0xa0 [ 16.248397][ T183] ? vprintk_emit+0x320/0x3e0 [ 16.248400][ T183] vprintk_emit+0x37c/0x3e0 [ 16.248403][ T183] ? wake_up_klogd_work_func+0x90/0x90 [ 16.248406][ T183] ? __lock_acquire+0x518/0xc20 [ 16.248410][ T183] _printk+0xc7/0x100 [ 16.248414][ T183] ? snapshot_read.cold+0x21/0x21 [ 16.248417][ T183] ? do_raw_spin_lock+0x131/0x280 [ 16.248420][ T183] ? __rwlock_init+0x150/0x150 [ 16.248424][ T183] ? do_raw_spin_lock+0x131/0x280 [ 16.248433][ T183] do_exit.cold+0x82/0x9c [ 16.248437][ T183] ? exit_notify+0x890/0x890 [ 16.248439][ T183] ? __lock_release.isra.0+0x69/0x1a0 [ 16.248442][ T183] ? rcu_is_watching+0x16/0xd0 [ 16.248445][ T183] do_group_exit+0xb8/0x370 [ 16.248448][ T183] __x64_sys_exit_group+0x3c/0x50 [ 16.248450][ T183] x64_sys_call+0x1567/0x1570 [ 16.248452][ T183] do_syscall_64+0xff/0x530 [ 16.248456][ T183] ? irq_exit_rcu+0x1a/0x30 [ 16.248460][ T183] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 16.248462][ T183] RIP: 0033:0x7f2f8628d1b8 [ 16.248465][ T183] Code: Unable to access opcode bytes at 0x7f2f8628d18e. [ 16.248466][ T183] RSP: 002b:00007ffe7887e758 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 16.248469][ T183] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f8628d1b8 [ 16.248470][ T183] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 16.248471][ T183] RBP: 00007ffe7887e8e0 R08: 000056176ad03e18 R09: 0000000000000000 [ 16.248471][ T183] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 16.248472][ T183] R13: 00007f2f85aeb050 R14: 00007f2f867bed9e R15: 000056176ab75de0 [ 16.248479][ T183]