------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.27/6022 is trying to acquire lock: ffffffff8eaf4160 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1902 but task is already holding lock: ffff88806a63b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:675 [inline] ffff88806a63b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:659 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&rq->__lock){-.-.}-{2:2}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:382 raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:667 raw_spin_rq_lock kernel/sched/sched.h:1653 [inline] _task_rq_lock+0xcf/0x500 kernel/sched/core.c:762 cgroup_move_task+0x81/0x320 kernel/sched/psi.c:1176 css_set_move_task+0x285/0x600 kernel/cgroup/cgroup.c:925 cgroup_post_fork+0x1f9/0x9a0 kernel/cgroup/cgroup.c:7009 copy_process+0x6b7a/0x8030 kernel/fork.c:2550 kernel_clone+0x176/0x9d0 kernel/fork.c:2748 user_mode_thread+0xcc/0x110 kernel/fork.c:2824 rest_init+0x21/0x260 init/main.c:682 start_kernel+0x48e/0x490 init/main.c:1175 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 -> #3 (&p->pi_lock){-.-.}-{2:2}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline] try_to_wake_up+0xbd/0x1c90 kernel/sched/core.c:4292 __wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108 __wake_up_common_lock kernel/sched/wait.c:125 [inline] __wake_up+0x31/0x60 kernel/sched/wait.c:146 tty_port_default_wakeup+0x47/0x60 drivers/tty/tty_port.c:67 serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1723 serial8250_handle_irq_locked+0x770/0x9a0 drivers/tty/serial/8250/8250_port.c:1837 serial8250_handle_irq.part.0+0xb4/0x530 drivers/tty/serial/8250/8250_port.c:1853 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1849 [inline] serial8250_default_handle_irq+0xc2/0x280 drivers/tty/serial/8250/8250_port.c:1867 serial8250_interrupt+0xf8/0x1b0 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x232/0x880 kernel/irq/handle.c:209 handle_irq_event_percpu kernel/irq/handle.c:246 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:263 handle_edge_irq+0x34c/0x950 kernel/irq/chip.c:859 generic_handle_irq_desc include/linux/irqdesc.h:188 [inline] handle_irq arch/x86/kernel/irq.c:209 [inline] call_irq_handler arch/x86/kernel/irq.c:265 [inline] __common_interrupt+0xd8/0x2f0 arch/x86/kernel/irq.c:280 common_interrupt+0xb9/0xe0 arch/x86/kernel/irq.c:273 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:665 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline] default_idle+0x9/0x10 arch/x86/kernel/process.c:768 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x3a7/0x5b0 kernel/sched/idle.c:355 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454 rest_init+0x251/0x260 init/main.c:717 start_kernel+0x48e/0x490 init/main.c:1175 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 -> #2 (&tty->write_wait){-...}-{3:3}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166 __wake_up_common_lock kernel/sched/wait.c:124 [inline] __wake_up+0x1c/0x60 kernel/sched/wait.c:146 tty_port_default_wakeup+0x47/0x60 drivers/tty/tty_port.c:67 serial8250_tx_chars+0x68f/0x860 drivers/tty/serial/8250/8250_port.c:1723 __start_tx+0x3e4/0x490 drivers/tty/serial/8250/8250_port.c:1430 serial8250_start_tx+0x368/0x540 drivers/tty/serial/8250/8250_port.c:1539 __uart_start+0x295/0x510 drivers/tty/serial/serial_core.c:161 uart_write+0x211/0xb20 drivers/tty/serial/serial_core.c:629 process_output_block drivers/tty/n_tty.c:557 [inline] n_tty_write+0x431/0x1160 drivers/tty/n_tty.c:2366 iterate_tty_write drivers/tty/tty_io.c:1006 [inline] file_tty_write.isra.0+0x4d2/0x890 drivers/tty/tty_io.c:1081 tty_write drivers/tty/tty_io.c:1102 [inline] redirected_tty_write drivers/tty/tty_io.c:1125 [inline] redirected_tty_write+0xd4/0x120 drivers/tty/tty_io.c:1105 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&port_lock_key){-.-.}-{3:3}: lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166 uart_port_lock_irqsave include/linux/serial_core.h:719 [inline] serial8250_console_write+0x177/0x1a50 drivers/tty/serial/8250/8250_port.c:3344 console_emit_next_record kernel/printk/printk.c:3183 [inline] console_flush_one_record+0x790/0xe50 kernel/printk/printk.c:3269 console_flush_all kernel/printk/printk.c:3343 [inline] __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3413 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479 _printk+0xcf/0x110 kernel/printk/printk.c:2504 register_console.cold+0xc0/0x248 kernel/printk/printk.c:4208 univ8250_console_init+0x6f/0x80 drivers/tty/serial/8250/8250_core.c:515 console_init+0x3d5/0x5b0 kernel/printk/printk.c:4407 start_kernel+0x314/0x490 init/main.c:1112 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 -> #0 (console_owner){....}-{0:0}: check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902 console_emit_next_record kernel/printk/printk.c:3177 [inline] console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269 console_flush_all kernel/printk/printk.c:3343 [inline] __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3413 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479 _printk+0xcf/0x110 kernel/printk/printk.c:2504 __report_bug.cold+0x34/0x141 lib/bug.c:248 report_bug+0xb2/0x220 lib/bug.c:286 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline] lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline] update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865 pick_next_task kernel/sched/core.c:6338 [inline] __schedule+0x1e2d/0x6730 kernel/sched/core.c:7149 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0xa00 kernel/entry/common.c:167 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679 jhash2 include/linux/jhash.h:129 [inline] hash_stack lib/stackdepot.c:571 [inline] stack_depot_save_flags+0xb8/0x9d0 lib/stackdepot.c:672 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 __call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3159 destroy_inode+0x134/0x1c0 fs/inode.c:392 evict+0x599/0xad0 fs/inode.c:849 iput_final fs/inode.c:2019 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2068 iput+0x35/0x40 fs/inode.c:2034 dentry_unlink_inode+0x284/0x470 fs/dcache.c:479 dentry_kill+0x25d/0xc20 fs/dcache.c:826 finish_dput fs/dcache.c:1001 [inline] dput.part.0+0xd7/0x240 fs/dcache.c:1042 dput+0x1f/0x30 fs/dcache.c:1037 find_next_child+0x18f/0x280 fs/libfs.c:592 __simple_recursive_removal+0x2ab/0x5c0 fs/libfs.c:609 debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:781 kvm_destroy_vm_debugfs+0xc6/0x200 virt/kvm/kvm_main.c:988 kvm_destroy_vm virt/kvm/kvm_main.c:1261 [inline] kvm_put_kvm+0x119/0xc10 virt/kvm/kvm_main.c:1331 kvm_vm_release+0x3c/0x50 virt/kvm/kvm_main.c:1354 __fput+0x3ff/0xb50 fs/file_table.c:512 fput_close_sync+0x118/0x250 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: console_owner --> &p->pi_lock --> &rq->__lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->__lock); lock(&p->pi_lock); lock(&rq->__lock); lock(console_owner); *** DEADLOCK *** 4 locks held by syz.0.27/6022: #0: ffff8880203b74c0 (&sb->s_type->i_mutex_key#8/2){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline] #0: ffff8880203b74c0 (&sb->s_type->i_mutex_key#8/2){+.+.}-{4:4}, at: __simple_recursive_removal+0xe0/0x5c0 fs/libfs.c:619 #1: ffff88806a63b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:675 [inline] #1: ffff88806a63b520 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:659 #2: ffffffff8ebd45a0 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x110 kernel/printk/printk.c:2504 #3: ffffffff8ebd4618 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:305 [inline] #3: ffffffff8ebd4618 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline] #3: ffffffff8ebd4618 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline] #3: ffffffff8ebd4618 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfd/0xe50 kernel/printk/printk.c:3246 stack backtrace: CPU: 2 UID: 0 PID: 6022 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165 check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902 console_emit_next_record kernel/printk/printk.c:3177 [inline] console_flush_one_record+0x739/0xe50 kernel/printk/printk.c:3269 console_flush_all kernel/printk/printk.c:3343 [inline] __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0x103/0x260 kernel/printk/printk.c:3413 vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479 _printk+0xcf/0x110 kernel/printk/printk.c:2504 __report_bug.cold+0x34/0x141 lib/bug.c:248 report_bug+0xb2/0x220 lib/bug.c:286 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline] RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline] RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865 Code: ab c8 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 c0 0b 00 00 48 b8 00 00 00 00 00 RSP: 0018:ffffc90004ecf460 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff88806a73b4c0 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8e183208 RDI: ffffffff8c400380 RBP: ffffc90004ecf608 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff912192d7 R11: 0000000000000000 R12: ffffffff9121c6a4 R13: ffff88806a73c3a0 R14: ffff88801f2ba540 R15: ffff88806a63c058 pick_next_task kernel/sched/core.c:6338 [inline] __schedule+0x1e2d/0x6730 kernel/sched/core.c:7149 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0xa00 kernel/entry/common.c:167 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679 RIP: 0010:jhash2 include/linux/jhash.h:129 [inline] RIP: 0010:hash_stack lib/stackdepot.c:571 [inline] RIP: 0010:stack_depot_save_flags+0xb8/0x9d0 lib/stackdepot.c:672 Code: 45 89 c1 41 89 c8 41 29 c9 41 c1 c0 06 45 31 c8 44 8d 0c 01 44 89 c1 44 29 c0 45 01 c8 c1 c1 08 31 c8 44 89 c9 41 89 c1 29 c1 <44> 01 c0 41 c1 c1 10 41 31 c9 44 89 c9 45 29 c8 41 01 c1 c1 c9 0d RSP: 0018:ffffc90004ecf720 EFLAGS: 00000a97 RAX: 000000008c61ad7e RBX: 0000000000000000 RCX: 00000000cb782353 RDX: 0000000000000016 RSI: ffffc90004ecf7cc RDI: 0000000000000017 RBP: 0000000000000000 R08: 0000000099df69b1 R09: 000000008c61ad7e R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90004ecf778 R13: 0000000000000016 R14: ffff8880203b5820 R15: 0000000000000001 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 __call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3159 destroy_inode+0x134/0x1c0 fs/inode.c:392 evict+0x599/0xad0 fs/inode.c:849 iput_final fs/inode.c:2019 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2068 iput+0x35/0x40 fs/inode.c:2034 dentry_unlink_inode+0x284/0x470 fs/dcache.c:479 dentry_kill+0x25d/0xc20 fs/dcache.c:826 finish_dput fs/dcache.c:1001 [inline] dput.part.0+0xd7/0x240 fs/dcache.c:1042 dput+0x1f/0x30 fs/dcache.c:1037 find_next_child+0x18f/0x280 fs/libfs.c:592 __simple_recursive_removal+0x2ab/0x5c0 fs/libfs.c:609 debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:781 kvm_destroy_vm_debugfs+0xc6/0x200 virt/kvm/kvm_main.c:988 kvm_destroy_vm virt/kvm/kvm_main.c:1261 [inline] kvm_put_kvm+0x119/0xc10 virt/kvm/kvm_main.c:1331 kvm_vm_release+0x3c/0x50 virt/kvm/kvm_main.c:1354 __fput+0x3ff/0xb50 fs/file_table.c:512 fput_close_sync+0x118/0x250 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd29199e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd28fbd5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007fd291c26090 RCX: 00007fd29199e0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: 00007fd291a35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd291c26128 R14: 00007fd291c26090 R15: 00007ffceca0fb08 debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0) WARNING: kernel/sched/sched.h:1641 at lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline], CPU#2: syz.0.27/6022 WARNING: kernel/sched/sched.h:1641 at lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline], CPU#2: syz.0.27/6022 WARNING: kernel/sched/sched.h:1641 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865, CPU#2: syz.0.27/6022 Modules linked in: CPU: 2 UID: 0 PID: 6022 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1641 [inline] RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1638 [inline] RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:865 Code: ab c8 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 c0 0b 00 00 48 b8 00 00 00 00 00 RSP: 0018:ffffc90004ecf460 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff88806a73b4c0 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8e183208 RDI: ffffffff8c400380 RBP: ffffc90004ecf608 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff912192d7 R11: 0000000000000000 R12: ffffffff9121c6a4 R13: ffff88806a73c3a0 R14: ffff88801f2ba540 R15: ffff88806a63c058 FS: 00007fd28fbd56c0(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558a6026c488 CR3: 0000000059531000 CR4: 0000000000352ef0 Call Trace: pick_next_task kernel/sched/core.c:6338 [inline] __schedule+0x1e2d/0x6730 kernel/sched/core.c:7149 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0xa00 kernel/entry/common.c:167 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679 RIP: 0010:jhash2 include/linux/jhash.h:129 [inline] RIP: 0010:hash_stack lib/stackdepot.c:571 [inline] RIP: 0010:stack_depot_save_flags+0xb8/0x9d0 lib/stackdepot.c:672 Code: 45 89 c1 41 89 c8 41 29 c9 41 c1 c0 06 45 31 c8 44 8d 0c 01 44 89 c1 44 29 c0 45 01 c8 c1 c1 08 31 c8 44 89 c9 41 89 c1 29 c1 <44> 01 c0 41 c1 c1 10 41 31 c9 44 89 c9 45 29 c8 41 01 c1 c1 c9 0d RSP: 0018:ffffc90004ecf720 EFLAGS: 00000a97 RAX: 000000008c61ad7e RBX: 0000000000000000 RCX: 00000000cb782353 RDX: 0000000000000016 RSI: ffffc90004ecf7cc RDI: 0000000000000017 RBP: 0000000000000000 R08: 0000000099df69b1 R09: 000000008c61ad7e R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90004ecf778 R13: 0000000000000016 R14: ffff8880203b5820 R15: 0000000000000001 kasan_save_stack+0x3f/0x50 mm/kasan/common.c:58 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 __call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3159 destroy_inode+0x134/0x1c0 fs/inode.c:392 evict+0x599/0xad0 fs/inode.c:849 iput_final fs/inode.c:2019 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2068 iput+0x35/0x40 fs/inode.c:2034 dentry_unlink_inode+0x284/0x470 fs/dcache.c:479 dentry_kill+0x25d/0xc20 fs/dcache.c:826 finish_dput fs/dcache.c:1001 [inline] dput.part.0+0xd7/0x240 fs/dcache.c:1042 dput+0x1f/0x30 fs/dcache.c:1037 find_next_child+0x18f/0x280 fs/libfs.c:592 __simple_recursive_removal+0x2ab/0x5c0 fs/libfs.c:609 debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:781 kvm_destroy_vm_debugfs+0xc6/0x200 virt/kvm/kvm_main.c:988 kvm_destroy_vm virt/kvm/kvm_main.c:1261 [inline] kvm_put_kvm+0x119/0xc10 virt/kvm/kvm_main.c:1331 kvm_vm_release+0x3c/0x50 virt/kvm/kvm_main.c:1354 __fput+0x3ff/0xb50 fs/file_table.c:512 fput_close_sync+0x118/0x250 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __x64_sys_close+0x8b/0x120 fs/open.c:1496 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd29199e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd28fbd5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00007fd291c26090 RCX: 00007fd29199e0d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a RBP: 00007fd291a35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd291c26128 R14: 00007fd291c26090 R15: 00007ffceca0fb08 ---------------- Code disassembly (best guess): 0: 45 89 c1 mov %r8d,%r9d 3: 41 89 c8 mov %ecx,%r8d 6: 41 29 c9 sub %ecx,%r9d 9: 41 c1 c0 06 rol $0x6,%r8d d: 45 31 c8 xor %r9d,%r8d 10: 44 8d 0c 01 lea (%rcx,%rax,1),%r9d 14: 44 89 c1 mov %r8d,%ecx 17: 44 29 c0 sub %r8d,%eax 1a: 45 01 c8 add %r9d,%r8d 1d: c1 c1 08 rol $0x8,%ecx 20: 31 c8 xor %ecx,%eax 22: 44 89 c9 mov %r9d,%ecx 25: 41 89 c1 mov %eax,%r9d 28: 29 c1 sub %eax,%ecx * 2a: 44 01 c0 add %r8d,%eax <-- trapping instruction 2d: 41 c1 c1 10 rol $0x10,%r9d 31: 41 31 c9 xor %ecx,%r9d 34: 44 89 c9 mov %r9d,%ecx 37: 45 29 c8 sub %r9d,%r8d 3a: 41 01 c1 add %eax,%r9d 3d: c1 c9 0d ror $0xd,%ecx