[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.9' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 594.369046] hrtimer: interrupt took 46190 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1004.433870] INFO: task syz-executor573:19900 blocked for more than 140 seconds. [ 1004.441485] Not tainted 4.19.211-syzkaller #0 [ 1004.465390] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1004.473390] syz-executor573 D28648 19900 8095 0x00000004 [ 1004.487208] Call Trace: [ 1004.489880] __schedule+0x887/0x2040 [ 1004.494690] ? io_schedule_timeout+0x140/0x140 [ 1004.499292] ? mark_held_locks+0xa6/0xf0 [ 1004.503356] ? rwsem_down_read_failed+0x20a/0x390 [ 1004.509665] schedule+0x8d/0x1b0 [ 1004.513050] rwsem_down_read_failed+0x20a/0x390 [ 1004.518882] ? rt_mutex_futex_unlock+0xf0/0xf0 [ 1004.523481] ? hrtimer_nanosleep+0x27f/0x570 [ 1004.543621] ? nanosleep_copyout+0x100/0x100 [ 1004.548465] call_rwsem_down_read_failed+0x14/0x30 [ 1004.553408] down_read+0x44/0x80 [ 1004.563835] ? __do_page_fault+0x97f/0xd60 [ 1004.574014] __do_page_fault+0x97f/0xd60 [ 1004.582610] ? page_fault+0x8/0x30 [ 1004.590902] ? trace_hardirqs_off_caller+0x6e/0x210 [ 1004.596421] ? spurious_fault+0x840/0x840 [ 1004.600789] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1004.606125] ? page_fault+0x8/0x30 [ 1004.609893] page_fault+0x1e/0x30 [ 1004.613837] RIP: 0033:0x7f3efcd7fd98 [ 1004.617770] Code: Bad RIP value. [ 1004.621322] RSP: 002b:00007fffba70d778 EFLAGS: 00010202 [ 1004.627397] RAX: 00007f3efcdb1bd0 RBX: 00007f3efcdb0198 RCX: 0000000000000001 [ 1004.635269] RDX: 00007f3efccedb90 RSI: 0000000000000000 RDI: 00007f3efcdb1bd0 [ 1004.642766] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000c1ede35769 [ 1004.650582] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 1004.658321] R13: 0000000000000001 R14: 00007f3efcdb7040 R15: 0000000000000001 [ 1004.674089] INFO: task syz-executor573:19901 blocked for more than 140 seconds. [ 1004.690645] Not tainted 4.19.211-syzkaller #0 [ 1004.701600] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1004.729703] syz-executor573 D28176 19901 8095 0x80000004 [ 1004.748808] Call Trace: [ 1004.758580] __schedule+0x887/0x2040 [ 1004.771545] ? io_schedule_timeout+0x140/0x140 [ 1004.792159] ? rwsem_down_read_failed+0x20a/0x390 [ 1004.808434] schedule+0x8d/0x1b0 [ 1004.820900] rwsem_down_read_failed+0x20a/0x390 [ 1004.835887] ? rt_mutex_futex_unlock+0xf0/0xf0 [ 1004.853586] ? lock_release+0x454/0x8b0 [ 1004.873572] ? lock_downgrade+0x720/0x720 [ 1004.877793] call_rwsem_down_read_failed+0x14/0x30 [ 1004.882732] down_read+0x44/0x80 [ 1004.930808] ? do_exit+0x6e4/0x2be0 [ 1004.942482] do_exit+0x6e4/0x2be0 [ 1004.953780] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1004.970975] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1004.984562] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1005.013551] ? mm_update_next_owner+0x650/0x650 [ 1005.013567] ? rcu_nmi_exit+0xb3/0x180 [ 1005.013580] ? retint_kernel+0x2d/0x2d [ 1005.013599] do_group_exit+0x125/0x310 [ 1005.013615] get_signal+0x3f2/0x1f70 [ 1005.013628] ? __mutex_unlock_slowpath+0xea/0x610 [ 1005.013642] ? wait_for_completion_io+0x10/0x10 [ 1005.013661] do_signal+0x8f/0x1670 [ 1005.013675] ? perf_ioctl+0x69/0x80 [ 1005.013691] ? do_vfs_ioctl+0x110/0x12e0 [ 1005.183524] ? setup_sigcontext+0x820/0x820 [ 1005.187892] ? ioctl_preallocate+0x200/0x200 [ 1005.192322] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1005.223519] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1005.228132] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1005.232894] ? rcu_nmi_exit+0xb3/0x180 [ 1005.263516] ? retint_kernel+0x2d/0x2d [ 1005.267538] exit_to_usermode_loop+0x204/0x2a0 [ 1005.272134] do_syscall_64+0x538/0x620 [ 1005.303514] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1005.308742] RIP: 0033:0x7f3efcd2abb9 [ 1005.323510] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 1005.403487] RSP: 002b:00007f3efccdc318 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 1005.411230] RAX: fffffffffffffe00 RBX: 00007f3efcdb2408 RCX: 00007f3efcd2abb9 [ 1005.453490] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3efcdb2408 [ 1005.460783] RBP: 00007f3efcdb2400 R08: 0000000000000000 R09: 0000000000000000 [ 1005.493486] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3efcd80074 [ 1005.500788] R13: 00007fffba70d74f R14: 00007f3efccdc400 R15: 0000000000022000 [ 1005.563521] [ 1005.563521] Showing all locks held in the system: [ 1005.569881] 1 lock held by khungtaskd/1571: [ 1005.603465] #0: 0000000074041b4b (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 1005.612231] 1 lock held by in:imklog/7812: [ 1005.643458] #0: 00000000e6c1526f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 1005.651484] 1 lock held by syz-executor573/19900: [ 1005.683454] #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1005.691738] 1 lock held by syz-executor573/19901: [ 1005.723451] #0: 000000000cce8708 (&mm->mmap_sem){++++}, at: do_exit+0x6e4/0x2be0 [ 1005.731121] 1 lock held by syz-executor573/19904: [ 1005.773460] 1 lock held by syz-executor573/28073: [ 1005.778498] #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1005.823466] 1 lock held by syz-executor573/28075: [ 1005.828339] #0: 00000000ef0aab85 (&mm->mmap_sem){++++}, at: do_exit+0x6e4/0x2be0 [ 1005.863443] 1 lock held by syz-executor573/28080: [ 1005.868317] 1 lock held by syz-executor573/2759: [ 1005.873065] #0: 000000004dd6bf2c (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1005.923437] 2 locks held by syz-executor573/2767: [ 1005.928313] 1 lock held by syz-executor573/2760: [ 1005.933056] #0: 00000000dcc0b088 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1006.003430] 2 locks held by syz-executor573/2769: [ 1006.008392] 1 lock held by syz-executor573/2762: [ 1006.013147] #0: 00000000df1d3a24 (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1006.053434] 2 locks held by syz-executor573/2768: [ 1006.058306] 1 lock held by syz-executor573/2763: [ 1006.063053] #0: 000000007e396a4d (&mm->mmap_sem){++++}, at: __do_page_fault+0x97f/0xd60 [ 1006.133451] 2 locks held by syz-executor573/2770: [ 1006.138345] [ 1006.140102] ============================================= [ 1006.140102] [ 1006.188452] NMI backtrace for cpu 0 [ 1006.192161] CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 1006.199598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.209030] Call Trace: [ 1006.211620] dump_stack+0x1fc/0x2ef [ 1006.215267] nmi_cpu_backtrace.cold+0x63/0xa2 [ 1006.219809] ? lapic_can_unplug_cpu+0x80/0x80 [ 1006.224298] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 1006.229579] watchdog+0x991/0xe60 [ 1006.233035] ? reset_hung_task_detector+0x30/0x30 [ 1006.237877] kthread+0x33f/0x460 [ 1006.241242] ? kthread_park+0x180/0x180 [ 1006.245212] ret_from_fork+0x24/0x30 [ 1006.249004] Sending NMI from CPU 0 to CPUs 1: [ 1006.254029] NMI backtrace for cpu 1 [ 1006.254035] CPU: 1 PID: 4684 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 1006.254041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.254045] RIP: 0010:check_memory_region+0x31/0x170 [ 1006.254056] Code: 00 00 48 b8 ff ff ff ff ff 7f ff ff 44 0f b6 c2 48 39 c7 0f 86 20 01 00 00 4c 8d 54 37 ff 41 54 48 b8 00 00 00 00 00 fc ff df <4d> 89 d1 55 48 89 fd 49 c1 e9 03 48 c1 ed 03 53 49 01 c1 48 01 c5 [ 1006.254060] RSP: 0018:ffff8880a1787a68 EFLAGS: 00000012 [ 1006.254067] RAX: dffffc0000000000 RBX: ffff8880a1787be0 RCX: ffffffff81299566 [ 1006.254072] RDX: 0000000000000001 RSI: 0000000000000060 RDI: ffff8880a1787b60 [ 1006.254077] RBP: ffff8880a1787b60 R08: 0000000000000001 R09: ffffed10135157c0 [ 1006.254082] R10: ffff8880a1787bbf R11: 0000000000000000 R12: 0000000000000060 [ 1006.254087] R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880a1787b60 [ 1006.254093] FS: 00007fc09f6ed8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 1006.254097] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1006.254102] CR2: 00007fc09cac2000 CR3: 00000000a1611000 CR4: 00000000003406e0 [ 1006.254107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1006.254112] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1006.254115] Call Trace: [ 1006.254118] memset+0x20/0x40 [ 1006.254121] __unwind_start+0x76/0x960 [ 1006.254125] ? unwind_next_frame+0x1400/0x1400 [ 1006.254134] ? lock_downgrade+0x720/0x720 [ 1006.254137] ? do_raw_spin_unlock+0x171/0x230 [ 1006.254141] ? debug_check_no_obj_freed+0x201/0x490 [ 1006.254145] __save_stack_trace+0x72/0x190 [ 1006.254149] ? __lock_acquire+0x6de/0x3ff0 [ 1006.254152] __kasan_slab_free+0x126/0x1f0 [ 1006.254155] ? mark_held_locks+0xf0/0xf0 [ 1006.254159] ? kmem_cache_free+0x226/0x260 [ 1006.254162] ? mark_held_locks+0xf0/0xf0 [ 1006.254166] ? putname+0xe1/0x120 [ 1006.254169] ? debug_check_no_obj_freed+0x201/0x490 [ 1006.254173] ? lock_downgrade+0x720/0x720 [ 1006.254176] ? lock_acquire+0x170/0x3c0 [ 1006.254180] ? debug_check_no_obj_freed+0xb5/0x490 [ 1006.254184] ? trace_hardirqs_off+0x64/0x200 [ 1006.254188] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1006.254192] ? debug_check_no_obj_freed+0x201/0x490 [ 1006.254195] ? __put_cred+0x1de/0x250 [ 1006.254199] kmem_cache_free+0x7f/0x260 [ 1006.254202] __put_cred+0x1de/0x250 [ 1006.254205] do_faccessat+0x64e/0x7a0 [ 1006.254209] ? __ia32_sys_fallocate+0x140/0x140 [ 1006.254213] ? trace_hardirqs_off_caller+0x6e/0x210 [ 1006.254216] ? do_syscall_64+0x21/0x620 [ 1006.254220] do_syscall_64+0xf9/0x620 [ 1006.254224] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1006.254227] RIP: 0033:0x7fc09e9a89c7 [ 1006.254237] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 1006.254241] RSP: 002b:00007ffee1f73028 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 1006.254250] RAX: ffffffffffffffda RBX: 00007ffee1f76050 RCX: 00007fc09e9a89c7 [ 1006.254254] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005615222e89a3 [ 1006.254259] RBP: 00007ffee1f73170 R08: 00005615222de3e5 R09: 0000000000000018 [ 1006.254264] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 1006.254269] R13: 0000000000000000 R14: 0000561523bb48a0 R15: 00007ffee1f73660 [ 1006.468051] Kernel panic - not syncing: hung_task: blocked tasks [ 1006.576573] CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 1006.584008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1006.593350] Call Trace: [ 1006.595934] dump_stack+0x1fc/0x2ef [ 1006.599559] panic+0x26a/0x50e [ 1006.602746] ? __warn_printk+0xf3/0xf3 [ 1006.606636] ? lapic_can_unplug_cpu+0x80/0x80 [ 1006.611214] ? ___preempt_schedule+0x16/0x18 [ 1006.615634] ? watchdog+0x991/0xe60 [ 1006.619262] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 1006.624708] watchdog+0x9a2/0xe60 [ 1006.628172] ? reset_hung_task_detector+0x30/0x30 [ 1006.633012] kthread+0x33f/0x460 [ 1006.636380] ? kthread_park+0x180/0x180 [ 1006.640353] ret_from_fork+0x24/0x30 [ 1006.644257] Kernel Offset: disabled [ 1006.647877] Rebooting in 86400 seconds..