[ 14.886676][ T88] (udev-worker) (88) used greatest stack depth: 22696 bytes left [ 14.886695][ T88] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322 [ 14.886697][ T88] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 88, name: (udev-worker) [ 14.886698][ T88] preempt_count: 2, expected: 0 [ 14.886699][ T88] RCU nest depth: 0, expected: 0 [ 14.886700][ T88] locks held by (udev-worker)/88: 5, last CPU#2: [ 14.886703][ T88] #0: ffffffff84c027b8 (low_water_lock){+.+.}-{3:3}, at: do_exit+0x887/0xdc0 [ 14.886716][ T88] #1: ffffffff84d99cc0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0x320/0x3e0 [ 14.886722][ T88] #2: ffffffff84d99d38 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x106/0x710 [ 14.886726][ T88] #3: ffffffff84c89660 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x40/0x60 [ 14.886729][ T88] #4: ffffffff84c89560 (printk_legacy_map-wait-type-override){....}-{3:3}, at: console_emit_next_record+0x202/0x4f0 [ 14.886733][ T88] irq event stamp: 403768 [ 14.886734][ T88] hardirqs last enabled at (403767): [] __down_trylock_console_sem+0x86/0xa0 [ 14.886736][ T88] hardirqs last disabled at (403768): [] console_emit_next_record+0x3f8/0x4f0 [ 14.886738][ T88] softirqs last enabled at (403752): [] handle_softirqs+0x67c/0x900 [ 14.886741][ T88] softirqs last disabled at (403703): [] __irq_exit_rcu+0x145/0x1c0 [ 14.886743][ T88] Preemption disabled at: [ 14.886744][ T88] [<0000000000000000>] 0x0 [ 14.886751][ T88] CPU: 2 UID: 0 PID: 88 Comm: (udev-worker) Tainted: G W 7.2.0-virtme #1 PREEMPT(full) [ 14.886754][ T88] Tainted: [W]=WARN [ 14.886755][ T88] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.886757][ T88] Call Trace: [ 14.886758][ T88] [ 14.886760][ T88] dump_stack_lvl+0x6f/0xa0 [ 14.886766][ T88] __might_resched.cold+0x1fe/0x2c1 [ 14.886770][ T88] ? perf_trace_sched_switch+0x7c0/0x7c0 [ 14.886775][ T88] ? __kmalloc_noprof+0xdb/0x760 [ 14.886779][ T88] __kmalloc_noprof+0x443/0x760 [ 14.886781][ T88] ? alloc_buf.isra.0+0x4b/0x260 [ 14.886787][ T88] ? do_raw_spin_unlock+0x59/0x250 [ 14.886789][ T88] alloc_buf.isra.0+0x4b/0x260 [ 14.886792][ T88] put_chars+0x1e1/0x2f0 [ 14.886795][ T88] ? __send_to_port+0x420/0x420 [ 14.886797][ T88] ? printk_get_next_message+0x2fe/0x7d0 [ 14.886800][ T88] ? rcu_read_lock_any_held+0x3c/0x90 [ 14.886803][ T88] ? validate_chain+0x38b/0xc20 [ 14.886807][ T88] hvc_console_print+0x292/0x780 [ 14.886810][ T88] ? __lock_acquire+0x518/0xc20 [ 14.886811][ T88] ? __lock_acquire+0x518/0xc20 [ 14.886816][ T88] ? hvc_write+0x3a0/0x3a0 [ 14.886819][ T88] ? rcu_is_watching+0x16/0xd0 [ 14.886822][ T88] ? lock_acquire+0x13c/0x160 [ 14.886826][ T88] console_emit_next_record+0x252/0x4f0 [ 14.886830][ T88] ? devkmsg_read+0x4e0/0x4e0 [ 14.886834][ T88] ? rcu_is_watching+0x16/0xd0 [ 14.886836][ T88] ? lock_acquire+0x13c/0x160 [ 14.886840][ T88] console_flush_one_record+0x46f/0x710 [ 14.886844][ T88] ? console_emit_next_record+0x4f0/0x4f0 [ 14.886845][ T88] ? __lock_acquire+0x518/0xc20 [ 14.886850][ T88] console_unlock+0xee/0x1f0 [ 14.886852][ T88] ? console_flush_one_record+0x710/0x710 [ 14.886854][ T88] ? rcu_is_watching+0x16/0xd0 [ 14.886856][ T88] ? lock_acquire+0x60/0x160 [ 14.886859][ T88] ? __down_trylock_console_sem+0x5e/0xa0 [ 14.886861][ T88] ? vprintk_emit+0x320/0x3e0 [ 14.886864][ T88] vprintk_emit+0x37c/0x3e0 [ 14.886867][ T88] ? wake_up_klogd_work_func+0x90/0x90 [ 14.886871][ T88] ? __lock_acquire+0x518/0xc20 [ 14.886874][ T88] _printk+0xc7/0x100 [ 14.886878][ T88] ? snapshot_read.cold+0x21/0x21 [ 14.886881][ T88] ? do_raw_spin_lock+0x131/0x280 [ 14.886883][ T88] ? __rwlock_init+0x150/0x150 [ 14.886886][ T88] ? do_raw_spin_lock+0x131/0x280 [ 14.886889][ T88] do_exit.cold+0x82/0x9c [ 14.886892][ T88] ? exit_notify+0x890/0x890 [ 14.886894][ T88] ? __lock_release.isra.0+0x69/0x1a0 [ 14.886897][ T88] ? rcu_is_watching+0x16/0xd0 [ 14.886901][ T88] do_group_exit+0xb8/0x370 [ 14.886904][ T88] __x64_sys_exit_group+0x3c/0x50 [ 14.886906][ T88] x64_sys_call+0x1567/0x1570 [ 14.886909][ T88] do_syscall_64+0xff/0x530 [ 14.886912][ T88] ? exc_page_fault+0xee/0x100 [ 14.886916][ T88] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 14.886918][ T88] RIP: 0033:0x7f1be9e7c1b8 [ 14.886920][ T88] Code: Unable to access opcode bytes at 0x7f1be9e7c18e. [ 14.886921][ T88] RSP: 002b:00007ffff1b79af8 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7 [ 14.886924][ T88] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1be9e7c1b8 [ 14.886925][ T88] RDX: 0000000000000000 RSI: fffffffffffffe90 RDI: 0000000000000000 [ 14.886926][ T88] RBP: 00007ffff1b79c80 R08: 000056041fe77ca8 R09: 0000000000000000 [ 14.886927][ T88] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 [ 14.886928][ T88] R13: 00007f1be96da050 R14: 00007f1bea3add9e R15: 000056041fd1c510 [ 14.886935][ T88]