[ 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 '10.128.0.81' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.656535] INFO: task syz-executor197:8094 blocked for more than 140 seconds. [ 717.663983] Not tainted 4.19.211-syzkaller #0 [ 717.670575] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.678875] syz-executor197 D26960 8094 8092 0x00000004 [ 717.684513] Call Trace: [ 717.687465] __schedule+0x887/0x2040 [ 717.691188] ? io_schedule_timeout+0x140/0x140 [ 717.695766] ? _raw_spin_unlock+0x29/0x40 [ 717.700289] schedule+0x8d/0x1b0 [ 717.703664] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.709678] ? fuse_do_ioctl+0x1850/0x1850 [ 717.713916] ? wait_woken+0x250/0x250 [ 717.718036] ? fuse_writepage_locked+0xb63/0x1010 [ 717.722885] ? fuse_writepage_locked+0x1010/0x1010 [ 717.728114] fuse_launder_page+0xb6/0xe0 [ 717.732176] invalidate_inode_pages2_range+0x795/0x1110 [ 717.737857] ? clear_shadow_entry+0x170/0x170 [ 717.742355] ? fuse_file_alloc+0x1d9/0x270 [ 717.747020] ? do_raw_spin_unlock+0x171/0x230 [ 717.751512] ? _raw_spin_unlock+0x29/0x40 [ 717.755696] ? fuse_do_open+0x1c4/0x500 [ 717.760015] fuse_finish_open+0x2e2/0x590 [ 717.764164] fuse_open_common+0x254/0x2c0 [ 717.768763] do_dentry_open+0x4aa/0x1160 [ 717.772816] ? fuse_open_common+0x2c0/0x2c0 [ 717.777429] ? inode_permission.part.0+0x10c/0x450 [ 717.782357] ? chown_common+0x550/0x550 [ 717.786324] ? inode_permission+0x3d/0x140 [ 717.790856] path_openat+0x793/0x2df0 [ 717.794644] ? path_lookupat+0x8d0/0x8d0 [ 717.798761] ? mark_held_locks+0xf0/0xf0 [ 717.802827] do_filp_open+0x18c/0x3f0 [ 717.806675] ? may_open_dev+0xf0/0xf0 [ 717.810478] ? lock_downgrade+0x720/0x720 [ 717.814607] ? lock_acquire+0x170/0x3c0 [ 717.818624] ? __alloc_fd+0x34/0x570 [ 717.822342] ? do_raw_spin_unlock+0x171/0x230 [ 717.827028] ? _raw_spin_unlock+0x29/0x40 [ 717.831168] ? __alloc_fd+0x28d/0x570 [ 717.834954] do_sys_open+0x3b3/0x520 [ 717.838721] ? filp_open+0x70/0x70 [ 717.842264] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.847675] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.852693] ? do_syscall_64+0x21/0x620 [ 717.856721] do_syscall_64+0xf9/0x620 [ 717.860522] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.865693] RIP: 0033:0x7fcafc4b44c9 [ 717.869458] Code: Bad RIP value. [ 717.872852] RSP: 002b:00007fcafc4652f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 717.880609] RAX: ffffffffffffffda RBX: 00007fcafc5454c0 RCX: 00007fcafc4b44c9 [ 717.887936] RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000020000100 [ 717.895195] RBP: 00007fcafc512164 R08: 0000000000000000 R09: 0000000000000000 [ 717.902508] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.909837] R13: 00007fcafc50e158 R14: 00007fcafc510160 R15: 00007fcafc5454c8 [ 717.917175] [ 717.917175] Showing all locks held in the system: [ 717.923489] 1 lock held by khungtaskd/1571: [ 717.927882] #0: 0000000075482f13 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.936567] 2 locks held by syz-executor197/8094: [ 717.941399] #0: 000000008accee1c (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.949438] #1: 00000000043dda49 (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.959066] [ 717.960677] ============================================= [ 717.960677] [ 717.967793] NMI backtrace for cpu 1 [ 717.971435] CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.978858] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.988194] Call Trace: [ 717.990769] dump_stack+0x1fc/0x2ef [ 717.994382] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.998859] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.003337] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.008597] watchdog+0x991/0xe60 [ 718.012036] ? reset_hung_task_detector+0x30/0x30 [ 718.016874] kthread+0x33f/0x460 [ 718.020233] ? kthread_park+0x180/0x180 [ 718.024187] ret_from_fork+0x24/0x30 [ 718.027991] Sending NMI from CPU 1 to CPUs 0: [ 718.032965] NMI backtrace for cpu 0 [ 718.032971] CPU: 0 PID: 4692 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.032977] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.032981] RIP: 0010:trace_hardirqs_off+0x31/0x200 [ 718.032992] Code: 53 e8 03 d8 fa ff 65 8b 1d bc be 9a 7e 31 ff 89 de e8 63 d9 fa ff 85 db 75 3e e8 ea d7 fa ff 65 c7 05 9f be 9a 7e 01 00 00 00 <65> 8b 1d b8 31 9a 7e 81 e3 00 00 10 00 31 ff 89 de e8 39 d9 fa ff [ 718.032996] RSP: 0018:ffff8880a0f4f9c8 EFLAGS: 00000093 [ 718.033004] RAX: ffff8880a0f42580 RBX: 0000000000000000 RCX: ffffffff8167ad7d [ 718.033009] RDX: 0000000000000000 RSI: ffffffff8167ad86 RDI: 0000000000000005 [ 718.033014] RBP: 00000000006080c0 R08: ffffffff8cd233c0 R09: 0000000000000000 [ 718.033019] R10: 0000000000000005 R11: 0000000059dfbda2 R12: 0000000000200000 [ 718.033024] R13: ffff88813bff04c0 R14: 0000000000000048 R15: ffff88813bff04c0 [ 718.033029] FS: 00007f82f79aa8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 718.033034] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.033039] CR2: 00007f82f4d7a000 CR3: 00000000a0c59000 CR4: 00000000003406f0 [ 718.033044] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.033049] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.033052] Call Trace: [ 718.033056] kmem_cache_alloc_trace+0x9b/0x380 [ 718.033060] apparmor_file_alloc_security+0x394/0xad0 [ 718.033064] ? apparmor_file_receive+0x160/0x160 [ 718.033067] ? __alloc_file+0x21/0x340 [ 718.033071] security_file_alloc+0x40/0x90 [ 718.033074] __alloc_file+0xd8/0x340 [ 718.033078] alloc_empty_file+0x6d/0x170 [ 718.033081] path_openat+0xe9/0x2df0 [ 718.033085] ? __lock_acquire+0x6de/0x3ff0 [ 718.033088] ? path_lookupat+0x8d0/0x8d0 [ 718.033092] ? __put_seccomp_filter+0xa0/0xa0 [ 718.033095] ? mark_held_locks+0xf0/0xf0 [ 718.033099] do_filp_open+0x18c/0x3f0 [ 718.033102] ? may_open_dev+0xf0/0xf0 [ 718.033105] ? __alloc_fd+0x28d/0x570 [ 718.033109] ? lock_downgrade+0x720/0x720 [ 718.033112] ? lock_acquire+0x170/0x3c0 [ 718.033116] ? __alloc_fd+0x34/0x570 [ 718.033120] ? do_raw_spin_unlock+0x171/0x230 [ 718.033123] ? _raw_spin_unlock+0x29/0x40 [ 718.033127] ? __alloc_fd+0x28d/0x570 [ 718.033130] do_sys_open+0x3b3/0x520 [ 718.033133] ? filp_open+0x70/0x70 [ 718.033137] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.033141] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.033145] ? do_syscall_64+0x21/0x620 [ 718.033148] do_syscall_64+0xf9/0x620 [ 718.033152] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.033156] RIP: 0033:0x7f82f6f39840 [ 718.033166] 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 [ 718.033170] RSP: 002b:00007ffd59447788 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.033179] RAX: ffffffffffffffda RBX: 00007ffd59447a90 RCX: 00007f82f6f39840 [ 718.033184] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 00005611df387680 [ 718.033189] RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff [ 718.033194] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 718.033199] R13: 00005611df37b040 R14: 00007ffd59447a50 R15: 00005611df3876d0 [ 718.033792] Kernel panic - not syncing: hung_task: blocked tasks [ 718.347451] CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.354874] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.364206] Call Trace: [ 718.366780] dump_stack+0x1fc/0x2ef [ 718.370419] panic+0x26a/0x50e [ 718.373617] ? __warn_printk+0xf3/0xf3 [ 718.377492] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.381969] ? ___preempt_schedule+0x16/0x18 [ 718.386364] ? watchdog+0x991/0xe60 [ 718.389978] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.395439] watchdog+0x9a2/0xe60 [ 718.398969] ? reset_hung_task_detector+0x30/0x30 [ 718.403807] kthread+0x33f/0x460 [ 718.407160] ? kthread_park+0x180/0x180 [ 718.411124] ret_from_fork+0x24/0x30 [ 718.415091] Kernel Offset: disabled [ 718.418710] Rebooting in 86400 seconds..