[ 12.452298][ T87] (udev-worker) (87) used greatest stack depth: 24304 bytes left [ 12.452317][ T87] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 12.452319][ T87] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 87, name: (udev-worker) [ 12.452321][ T87] preempt_count: 2, expected: 0 [ 12.452322][ T87] RCU nest depth: 0, expected: 0 [ 12.452323][ T87] locks held by (udev-worker)/87: 5, last CPU#3: [ 12.452325][ T87] #0: ffffffff900027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 12.452336][ T87] #1: ffffffff90199dc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 12.452341][ T87] #2: ffffffff90199e38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 12.452345][ T87] #3: ffffffff90089760 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 12.452349][ T87] #4: ffffffff90089660 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 12.452353][ T87] irq event stamp: 408556 [ 12.452354][ T87] hardirqs last enabled at (408555): [] __down_trylock_console_sem+0x86/0xa0 [ 12.452357][ T87] hardirqs last disabled at (408556): [] console_emit_next_record+0x3f8/0x4f0 [ 12.452359][ T87] softirqs last enabled at (408492): [] netlink_release+0x17b/0xcf0 [ 12.452363][ T87] softirqs last disabled at (408490): [] netlink_release+0xd2/0xcf0 [ 12.452365][ T87] Preemption disabled at: [ 12.452366][ T87] [<0000000000000000>] 0x0 [ 12.452375][ T87] CPU: 3 UID: 0 PID: 87 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 12.452383][ T87] Tainted: [W]=WARN [ 12.452383][ T87] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.452385][ T87] Call Trace: [ 12.452387][ T87] [ 12.452388][ T87] dump_stack_lvl+0x6f/0xa0 [ 12.452395][ T87] __might_resched.cold+0x1fe/0x2c1 [ 12.452399][ T87] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 12.452403][ T87] ? __kmalloc_noprof+0xdb/0x760 [ 12.452408][ T87] __kmalloc_noprof+0x443/0x760 [ 12.452411][ T87] ? alloc_buf.isra.0+0x4b/0x260 [ 12.452417][ T87] ? do_raw_spin_unlock+0x59/0x250 [ 12.452420][ T87] alloc_buf.isra.0+0x4b/0x260 [ 12.452423][ T87] put_chars+0x1e1/0x2f0 [ 12.452426][ T87] ? __send_to_port+0x420/0x420 [ 12.452428][ T87] ? printk_get_next_message+0x2fe/0x7d0 [ 12.452432][ T87] ? rcu_read_lock_any_held+0x3c/0x90 [ 12.452435][ T87] ? validate_chain+0x38b/0xc20 [ 12.452438][ T87] hvc_console_print+0x292/0x780 [ 12.452442][ T87] ? __lock_acquire+0x518/0xc20 [ 12.452443][ T87] ? __lock_acquire+0x518/0xc20 [ 12.452448][ T87] ? hvc_write+0x3a0/0x3a0 [ 12.452451][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.452454][ T87] ? lock_acquire+0x13c/0x160 [ 12.452458][ T87] console_emit_next_record+0x252/0x4f0 [ 12.452462][ T87] ? devkmsg_read+0x4e0/0x4e0 [ 12.452466][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.452468][ T87] ? lock_acquire+0x13c/0x160 [ 12.452472][ T87] console_flush_one_record+0x46f/0x710 [ 12.452476][ T87] ? console_emit_next_record+0x4f0/0x4f0 [ 12.452478][ T87] ? __lock_acquire+0x518/0xc20 [ 12.452483][ T87] console_unlock+0xee/0x1f0 [ 12.452485][ T87] ? console_flush_one_record+0x710/0x710 [ 12.452487][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.452489][ T87] ? lock_acquire+0xa0/0x160 [ 12.452493][ T87] ? __down_trylock_console_sem+0x5e/0xa0 [ 12.452494][ T87] ? vprintk_emit+0x320/0x3e0 [ 12.452498][ T87] vprintk_emit+0x37c/0x3e0 [ 12.452502][ T87] ? wake_up_klogd_work_func+0x90/0x90 [ 12.452505][ T87] ? __lock_acquire+0x518/0xc20 [ 12.452508][ T87] _printk+0xc7/0x100 [ 12.452512][ T87] ? snapshot_read.cold+0x21/0x21 [ 12.452514][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.452517][ T87] ? __rwlock_init+0x150/0x150 [ 12.452521][ T87] ? do_raw_spin_lock+0x131/0x280 [ 12.452523][ T87] do_exit.cold+0x82/0x9c [ 12.452527][ T87] ? exit_notify+0x890/0x890 [ 12.452528][ T87] ? __lock_release.isra.0+0x69/0x1a0 [ 12.452531][ T87] ? rcu_is_watching+0x16/0xd0 [ 12.452535][ T87] do_group_exit+0xb8/0x370 [ 12.452537][ T87] __x64_sys_exit_group+0x3c/0x50 [ 12.452539][ T87] x64_sys_call+0x1567/0x1570 [ 12.452541][ T87] do_syscall_64+0xff/0x530 [ 12.452544][ T87] ? exc_page_fault+0xee/0x100 [ 12.452548][ T87] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 12.452550][ T87] RIP: 0033:0x7f30e68401b8 [ 12.452552][ T87] Code: Unable to access opcode bytes at 0x7f30e684018e. [ 12.452553][ T87] RSP: 002b:00007ffd183454f8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 12.452556][ T87] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f30e68401b8 [ 12.452557][ T87] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 12.452558][ T87] RBP: 00007ffd18345680 R08: 000055a2e2ba1af8 R09: 0000000000000000 [ 12.452559][ T87] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 12.452560][ T87] R13: 00007f30e609e050 R14: 00007f30e6d71d9e R15: 000055a2e2b990f0 [ 12.452566][ T87]