[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.133' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.600165] INFO: task syz-executor211:8116 blocked for more than 140 seconds. [ 717.607611] Not tainted 4.19.211-syzkaller #0 [ 717.613170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.621285] syz-executor211 D27224 8116 8114 0x00000004 [ 717.626918] Call Trace: [ 717.629489] __schedule+0x887/0x2040 [ 717.633360] ? io_schedule_timeout+0x140/0x140 [ 717.637942] ? _raw_spin_unlock+0x29/0x40 [ 717.642317] schedule+0x8d/0x1b0 [ 717.645682] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.651534] ? fuse_do_ioctl+0x1850/0x1850 [ 717.655808] ? wait_woken+0x250/0x250 [ 717.659588] ? fuse_writepage_locked+0xb63/0x1010 [ 717.664577] ? fuse_writepage_locked+0x1010/0x1010 [ 717.669504] fuse_launder_page+0xb6/0xe0 [ 717.674918] invalidate_inode_pages2_range+0x795/0x1110 [ 717.680426] ? clear_shadow_entry+0x170/0x170 [ 717.684919] ? fuse_file_alloc+0x1d9/0x270 [ 717.689196] ? do_raw_spin_unlock+0x171/0x230 [ 717.693897] ? _raw_spin_unlock+0x29/0x40 [ 717.698045] ? fuse_do_open+0x1c4/0x500 [ 717.702173] fuse_finish_open+0x2e2/0x590 [ 717.706318] fuse_open_common+0x254/0x2c0 [ 717.710754] do_dentry_open+0x4aa/0x1160 [ 717.714810] ? fuse_open_common+0x2c0/0x2c0 [ 717.719120] ? inode_permission.part.0+0x10c/0x450 [ 717.724191] ? chown_common+0x550/0x550 [ 717.728159] ? inode_permission+0x3d/0x140 [ 717.732548] path_openat+0x793/0x2df0 [ 717.736352] ? path_lookupat+0x8d0/0x8d0 [ 717.740540] ? mark_held_locks+0xf0/0xf0 [ 717.744604] ? mark_held_locks+0xf0/0xf0 [ 717.748648] do_filp_open+0x18c/0x3f0 [ 717.752592] ? may_open_dev+0xf0/0xf0 [ 717.756390] ? lock_downgrade+0x720/0x720 [ 717.760661] ? lock_acquire+0x170/0x3c0 [ 717.764629] ? __alloc_fd+0x34/0x570 [ 717.768325] ? do_raw_spin_unlock+0x171/0x230 [ 717.772967] ? _raw_spin_unlock+0x29/0x40 [ 717.777109] ? __alloc_fd+0x28d/0x570 [ 717.781036] do_sys_open+0x3b3/0x520 [ 717.784745] ? filp_open+0x70/0x70 [ 717.788267] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.793782] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.798796] ? do_syscall_64+0x21/0x620 [ 717.802897] do_syscall_64+0xf9/0x620 [ 717.806694] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.812019] RIP: 0033:0x7fc7add434c9 [ 717.815735] Code: Bad RIP value. [ 717.819079] RSP: 002b:00007fc7adcf42f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 717.826933] RAX: ffffffffffffffda RBX: 00007fc7addd44c0 RCX: 00007fc7add434c9 [ 717.834322] RDX: 00007fc7add434c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 717.841704] RBP: 00007fc7adda1164 R08: 0000000000000000 R09: 0000000000000000 [ 717.848971] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.856376] R13: 00007fc7add9d158 R14: 00007fc7add9f160 R15: 00007fc7addd44c8 [ 717.863789] [ 717.863789] Showing all locks held in the system: [ 717.870250] 1 lock held by khungtaskd/1570: [ 717.874559] #0: 00000000538307cf (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.883328] 1 lock held by systemd-journal/4685: [ 717.888082] #0: 000000000658d70a (&rq->lock){-.-.}, at: pick_next_task_fair+0x556/0x1570 [ 717.896547] 1 lock held by in:imklog/7823: [ 717.900884] #0: 000000004dce3302 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 717.908865] 2 locks held by syz-executor211/8116: [ 717.913829] #0: 00000000a3f38f74 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.922001] #1: 00000000df8eb6fa (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.931616] [ 717.933234] ============================================= [ 717.933234] [ 717.940291] NMI backtrace for cpu 0 [ 717.943907] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.951328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.960655] Call Trace: [ 717.963226] dump_stack+0x1fc/0x2ef [ 717.966834] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.971308] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.975784] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 717.981041] watchdog+0x991/0xe60 [ 717.984478] ? reset_hung_task_detector+0x30/0x30 [ 717.989300] kthread+0x33f/0x460 [ 717.992649] ? kthread_park+0x180/0x180 [ 717.996627] ret_from_fork+0x24/0x30 [ 718.000454] Sending NMI from CPU 0 to CPUs 1: [ 718.005433] NMI backtrace for cpu 1 [ 718.005439] CPU: 1 PID: 4685 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.005445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.005449] RIP: 0010:inode_permission.part.0+0x28/0x450 [ 718.005460] Code: 00 00 41 57 41 56 41 55 41 89 f5 41 54 55 48 89 fd 53 44 89 eb 48 83 ec 08 83 e3 02 e8 41 33 bd ff 31 ff 89 de e8 a8 34 bd ff <85> db 0f 85 ee 00 00 00 e8 2b 33 bd ff 4c 8d 75 02 48 b8 00 00 00 [ 718.005464] RSP: 0018:ffff8880a17c7a48 EFLAGS: 00000293 [ 718.005472] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81a55238 [ 718.005477] RDX: 0000000000000000 RSI: ffff8880a17b83c0 RDI: 0000000000000005 [ 718.005482] RBP: ffff8880ae26a230 R08: ffffffff8cd37ca0 R09: 0000000000000000 [ 718.005487] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880ae26a230 [ 718.005492] R13: 0000000000000081 R14: ffff8880a17c7ce0 R15: ffff888094c5c361 [ 718.005497] FS: 00007f811bfb68c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.005501] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.005506] CR2: 00007f8119388020 CR3: 00000000a187b000 CR4: 00000000003406e0 [ 718.005511] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.005517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.005519] Call Trace: [ 718.005523] link_path_walk.part.0+0x1a0/0x1230 [ 718.005526] ? nd_jump_root+0x1e3/0x410 [ 718.005530] ? walk_component+0xda0/0xda0 [ 718.005534] ? percpu_counter_add_batch+0x126/0x180 [ 718.005537] path_openat+0x1db/0x2df0 [ 718.005541] ? path_lookupat+0x8d0/0x8d0 [ 718.005544] ? __put_seccomp_filter+0xa0/0xa0 [ 718.005548] ? mark_held_locks+0xf0/0xf0 [ 718.005551] do_filp_open+0x18c/0x3f0 [ 718.005555] ? may_open_dev+0xf0/0xf0 [ 718.005558] ? lock_downgrade+0x720/0x720 [ 718.005562] ? lock_acquire+0x170/0x3c0 [ 718.005565] ? __alloc_fd+0x34/0x570 [ 718.005568] ? do_raw_spin_unlock+0x171/0x230 [ 718.005572] ? _raw_spin_unlock+0x29/0x40 [ 718.005575] ? __alloc_fd+0x28d/0x570 [ 718.005579] do_sys_open+0x3b3/0x520 [ 718.005582] ? filp_open+0x70/0x70 [ 718.005586] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.005590] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.005593] ? do_syscall_64+0x21/0x620 [ 718.005597] do_syscall_64+0xf9/0x620 [ 718.005601] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.005604] RIP: 0033:0x7f811b545840 [ 718.005615] 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 [ 718.005618] RSP: 002b:00007ffc20711c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.005627] RAX: ffffffffffffffda RBX: 00007ffc20711f20 RCX: 00007f811b545840 [ 718.005632] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055775e108580 [ 718.005636] RBP: 000000000000000d R08: 00007f811b52fbb8 R09: 00000000ffffffff [ 718.005641] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 718.005646] R13: 000055775e0fc040 R14: 00007ffc20711ee0 R15: 000055775e109820 [ 718.006573] Kernel panic - not syncing: hung_task: blocked tasks [ 718.299225] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.306650] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.315980] Call Trace: [ 718.318552] dump_stack+0x1fc/0x2ef [ 718.322160] panic+0x26a/0x50e [ 718.325331] ? __warn_printk+0xf3/0xf3 [ 718.329199] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.333672] ? ___preempt_schedule+0x16/0x18 [ 718.338063] ? watchdog+0x991/0xe60 [ 718.341668] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.347102] watchdog+0x9a2/0xe60 [ 718.350536] ? reset_hung_task_detector+0x30/0x30 [ 718.355356] kthread+0x33f/0x460 [ 718.358697] ? kthread_park+0x180/0x180 [ 718.362650] ret_from_fork+0x24/0x30 [ 718.366517] Kernel Offset: disabled [ 718.370155] Rebooting in 86400 seconds..