INFO: task syz-executor.1:8709 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28552 8709 389 0x80004006 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 locks_remove_posix+0x277/0x4e0 fs/locks.c:2706 __sched_text_start+0x8/0x8 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] prepare_to_wait_event+0x129/0x650 kernel/sched/wait.c:305 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x39/0x40 kernel/locking/spinlock.c:191 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 wdm_flush+0x2ea/0x3c0 drivers/usb/class/cdc-wdm.c:590 wdm_poll+0x280/0x280 include/linux/poll.h:50 finish_wait+0x260/0x260 include/linux/list.h:301 task_work_add+0x97/0x120 kernel/task_work.c:35 wdm_poll+0x280/0x280 include/linux/poll.h:50 filp_close+0xb4/0x170 fs/open.c:1251 close_files fs/file.c:388 [inline] put_files_struct fs/file.c:416 [inline] put_files_struct+0x1d8/0x2e0 fs/file.c:413 exit_files+0x7e/0xa0 fs/file.c:445 do_exit+0xb36/0x2c80 kernel/exit.c:791 find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458 mm_update_next_owner+0x7a0/0x7a0 kernel/exit.c:375 lock_downgrade+0x720/0x720 kernel/locking/lockdep.c:4599 do_group_exit+0x125/0x340 kernel/exit.c:894 get_signal+0x480/0x2480 kernel/signal.c:2739 schedule_timeout_idle+0x80/0x80 kernel/time/timer.c:1942 do_signal+0x88/0x1ae0 arch/x86/kernel/signal.c:784 free_object+0x5/0x70 lib/debugobjects.c:429 destroy_hrtimer_on_stack kernel/time/hrtimer.c:453 [inline] hrtimer_nanosleep+0x211/0x3a0 kernel/time/hrtimer.c:1947 nanosleep_copyout+0x100/0x100 kernel/time/hrtimer.c:1861 force_valid_ss arch/x86/kernel/signal.c:73 [inline] restore_sigcontext+0x620/0x620 arch/x86/kernel/signal.c:134 hrtimer_init_sleeper_on_stack+0x90/0x90 kernel/time/hrtimer.c:1833 put_old_itimerspec32+0x1d0/0x1d0 kernel/time/time.c:908 __do_sys_clock_gettime kernel/time/posix-timers.c:1094 [inline] __se_sys_clock_gettime kernel/time/posix-timers.c:1082 [inline] __x64_sys_clock_gettime+0x1b7/0x240 kernel/time/posix-timers.c:1082 __do_sys_nanosleep kernel/time/hrtimer.c:1962 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1953 [inline] __x64_sys_nanosleep+0x1ed/0x260 kernel/time/hrtimer.c:1953 hrtimer_nanosleep+0x3a0/0x3a0 kernel/time/hrtimer.c:1943 exit_to_usermode_loop+0x1a2/0x200 arch/x86/entry/common.c:161 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x4e0/0x5a0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 INFO: task syz-executor.5:8770 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28304 8770 376 0x00000004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 __sched_text_start+0x8/0x8 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] prepare_to_wait_event+0x129/0x650 kernel/sched/wait.c:305 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 wdm_flush+0x2ea/0x3c0 drivers/usb/class/cdc-wdm.c:590 wdm_poll+0x280/0x280 include/linux/poll.h:50 finish_wait+0x260/0x260 include/linux/list.h:301 wdm_poll+0x280/0x280 include/linux/poll.h:50 filp_close+0xb4/0x170 fs/open.c:1251 __close_fd+0x133/0x200 fs/file.c:641 __do_sys_close fs/open.c:1270 [inline] __se_sys_close fs/open.c:1268 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1268 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 INFO: task syz-executor.3:8778 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28552 8778 390 0x00000004 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 __sched_text_start+0x8/0x8 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] prepare_to_wait_event+0x129/0x650 kernel/sched/wait.c:305 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 wdm_flush+0x2ea/0x3c0 drivers/usb/class/cdc-wdm.c:590 wdm_poll+0x280/0x280 include/linux/poll.h:50 finish_wait+0x260/0x260 include/linux/list.h:301 wdm_poll+0x280/0x280 include/linux/poll.h:50 filp_close+0xb4/0x170 fs/open.c:1251 __close_fd+0x133/0x200 fs/file.c:641 __do_sys_close fs/open.c:1270 [inline] __se_sys_close fs/open.c:1268 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1268 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: ffffffff87111260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5754 1 lock held by systemd-journal/140: 1 lock held by in:imklog/273: #0: ffff8881c91fb4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 2 locks held by agetty/8502: #0: ffff8881ceec6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc900107cb2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 irq_force_complete_move.cold+0x13/0x47 arch/x86/kernel/apic/vector.c:1023 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x1db/0x207 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa99/0xfd0 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 140 Comm: systemd-journal Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__phys_addr+0x4d/0x150 arch/x86/mm/physaddr.c:25 Code: c9 2e 00 4d 85 e4 0f 85 a1 00 00 00 e8 2c c8 2e 00 48 c7 c0 48 a0 ee 86 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 d5 00 00 00 48 89 d8 48 2b 05 3b 29 dd 05 48 89 df 4c 8d a0 RSP: 0018:ffff8881d1d17c40 EFLAGS: 00000246 RAX: 1ffffffff0ddd409 RBX: ffff888248a6d400 RCX: ffffffff811176d6 RDX: dffffc0000000000 RSI: ffffffff811176e4 RDI: 0000000000000006 RBP: ffff8881c8a6d400 R08: ffff8881d27d3180 R09: 0000000000000001 R10: ffffea0007229b00 R11: ffffea0007229b60 R12: 0000000000000000 R13: ffff8881d1d17ca8 R14: ffff8881da11e000 R15: ffff8881da11e000 FS: 00007f01c3b378c0(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f01c08d6000 CR3: 00000001d1c2f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: qlist_free_all+0x19/0xa0 mm/kasan/quarantine.c:158 virt_to_head_page include/linux/mm.h:833 [inline] ___cache_free+0x15/0xa0 mm/slub.c:3052 qlink_free mm/kasan/quarantine.c:148 [inline] qlist_free_all+0x32/0xa0 mm/kasan/quarantine.c:167 getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 quarantine_reduce+0x135/0x170 mm/kasan/quarantine.c:260 __kasan_kmalloc.constprop.0+0x97/0xd0 mm/kasan/common.c:476 getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc_node mm/slub.c:2797 [inline] slab_alloc mm/slub.c:2805 [inline] kmem_cache_alloc+0xd8/0x300 mm/slub.c:2810 getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 do_sys_openat2+0x3fc/0x7d0 fs/open.c:1142 file_open_root+0x400/0x400 fs/open.c:1129 __secure_computing+0xb4/0x280 kernel/seccomp.c:950 syscall_trace_enter+0x41d/0xcd0 arch/x86/entry/common.c:130 do_sys_open+0xc3/0x140 fs/open.c:1164 filp_open+0x70/0x70 fs/open.c:1117 trace_hardirqs_off_caller+0x55/0x200 kernel/trace/trace_preemptirq.c:73 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f01c30c7840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffdb134a658 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffdb134a960 RCX: 00007f01c30c7840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000056148331c640 RBP: 000000000000000d R08: 000000000000c0ff R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000561483318040 R14: 00007ffdb134a920 R15: 0000561483323f20