[ 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.730506] INFO: task syz-executor222:8135 blocked for more than 140 seconds. [ 717.738008] Not tainted 4.19.211-syzkaller #0 [ 717.744662] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.752932] syz-executor222 D27400 8135 8133 0x00000004 [ 717.758580] Call Trace: [ 717.761579] __schedule+0x887/0x2040 [ 717.765305] ? io_schedule_timeout+0x140/0x140 [ 717.769873] ? _raw_spin_unlock+0x29/0x40 [ 717.774391] schedule+0x8d/0x1b0 [ 717.777768] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.784956] ? fuse_do_ioctl+0x1850/0x1850 [ 717.789215] ? wait_woken+0x250/0x250 [ 717.793377] ? fuse_writepage_locked+0xb63/0x1010 [ 717.798295] ? fuse_writepage_locked+0x1010/0x1010 [ 717.803627] fuse_launder_page+0xb6/0xe0 [ 717.807744] invalidate_inode_pages2_range+0x795/0x1110 [ 717.813627] ? clear_shadow_entry+0x170/0x170 [ 717.818128] ? fuse_file_alloc+0x1d9/0x270 [ 717.822821] ? do_raw_spin_unlock+0x171/0x230 [ 717.827311] ? _raw_spin_unlock+0x29/0x40 [ 717.831770] ? fuse_do_open+0x1c4/0x500 [ 717.835755] fuse_finish_open+0x2e2/0x590 [ 717.839890] fuse_open_common+0x254/0x2c0 [ 717.844489] do_dentry_open+0x4aa/0x1160 [ 717.848562] ? fuse_open_common+0x2c0/0x2c0 [ 717.853304] ? inode_permission.part.0+0x10c/0x450 [ 717.858239] ? chown_common+0x550/0x550 [ 717.862533] ? inode_permission+0x3d/0x140 [ 717.866781] path_openat+0x793/0x2df0 [ 717.870911] ? path_lookupat+0x8d0/0x8d0 [ 717.874976] ? mark_held_locks+0xf0/0xf0 [ 717.879039] do_filp_open+0x18c/0x3f0 [ 717.883152] ? may_open_dev+0xf0/0xf0 [ 717.886956] ? lock_downgrade+0x720/0x720 [ 717.891426] ? lock_acquire+0x170/0x3c0 [ 717.895399] ? __alloc_fd+0x34/0x570 [ 717.899091] ? do_raw_spin_unlock+0x171/0x230 [ 717.903897] ? _raw_spin_unlock+0x29/0x40 [ 717.908048] ? __alloc_fd+0x28d/0x570 [ 717.912176] do_sys_open+0x3b3/0x520 [ 717.915902] ? filp_open+0x70/0x70 [ 717.919433] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.925150] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.930179] ? do_syscall_64+0x21/0x620 [ 717.934527] do_syscall_64+0xf9/0x620 [ 717.938361] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.943944] RIP: 0033:0x7fb4d1b544f9 [ 717.947661] Code: Bad RIP value. [ 717.951344] RSP: 002b:00007fb4d1b052f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 717.959063] RAX: ffffffffffffffda RBX: 00007fb4d1be54e0 RCX: 00007fb4d1b544f9 [ 717.966653] RDX: 0000000000000000 RSI: 0000000000000300 RDI: 0000000020000100 [ 717.974160] RBP: 00007fb4d1bb2164 R08: 0000000000000000 R09: 0000000000000000 [ 717.981713] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.988981] R13: 00007fb4d1bae158 R14: 00007fb4d1bb0160 R15: 00007fb4d1be54e8 [ 717.996578] [ 717.996578] Showing all locks held in the system: [ 718.003002] 1 lock held by khungtaskd/1569: [ 718.007309] #0: 0000000017fbf274 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.015989] 2 locks held by syz-executor222/8135: [ 718.020895] #0: 00000000a1b25fd2 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 718.028887] #1: 00000000ee0512bc (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 718.038475] [ 718.040094] ============================================= [ 718.040094] [ 718.047167] NMI backtrace for cpu 0 [ 718.050846] CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.058282] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 718.067625] Call Trace: [ 718.070202] dump_stack+0x1fc/0x2ef [ 718.073814] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.078308] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.082787] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.088048] watchdog+0x991/0xe60 [ 718.091536] ? reset_hung_task_detector+0x30/0x30 [ 718.096457] kthread+0x33f/0x460 [ 718.099820] ? kthread_park+0x180/0x180 [ 718.103879] ret_from_fork+0x24/0x30 [ 718.107693] Sending NMI from CPU 0 to CPUs 1: [ 718.112759] NMI backtrace for cpu 1 [ 718.112766] CPU: 1 PID: 4693 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.112772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 718.112776] RIP: 0010:unwind_next_frame+0xd04/0x1400 [ 718.112786] Code: 8b 7c 24 28 49 89 46 48 48 81 c7 98 00 00 00 e8 42 ef ff ff 48 8b 14 24 48 b8 00 00 00 00 00 fc ff df 4c 8b a4 24 a8 00 00 00 <48> c1 ea 03 80 3c 02 00 0f 85 b2 05 00 00 48 8b 54 24 08 4d 89 66 [ 718.112791] RSP: 0018:ffff8880a0c5f9f8 EFLAGS: 00000296 [ 718.112798] RAX: dffffc0000000000 RBX: 1ffff1101418bf48 RCX: 1ffff1101418bf67 [ 718.112803] RDX: ffff8880a0c5fb60 RSI: ffff8880a0c5faa0 RDI: ffff8880a0c5fff0 [ 718.112808] RBP: 0000000000000001 R08: ffffffff8c11b3f6 R09: ffffffff8c11b3d4 [ 718.112813] R10: ffff8880a0c5fb87 R11: 0000000000074071 R12: 00007ffe8ddcaf18 [ 718.112818] R13: ffff8880a0c5fb5d R14: ffff8880a0c5fb28 R15: ffffffff8c11b3f2 [ 718.112823] FS: 00007efcc213e8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.112828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.112833] CR2: 00007efcbf50f000 CR3: 00000000a1717000 CR4: 00000000003406e0 [ 718.112838] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.112842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.112845] Call Trace: [ 718.112849] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.112853] ? deref_stack_reg+0x1d0/0x1d0 [ 718.112856] ? __unwind_start+0x5b8/0x960 [ 718.112860] ? unwind_next_frame+0x1400/0x1400 [ 718.112864] ? __bpf_prog_run32+0x8f/0xd0 [ 718.112867] ? __bpf_prog_run64+0xd0/0xd0 [ 718.112871] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.112874] __save_stack_trace+0x9f/0x190 [ 718.112878] kasan_kmalloc+0xeb/0x160 [ 718.112881] ? kmem_cache_alloc+0x110/0x370 [ 718.112885] ? prepare_creds+0x39/0x510 [ 718.112888] ? do_faccessat+0x94/0x7a0 [ 718.112892] ? do_syscall_64+0xf9/0x620 [ 718.112896] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.112899] ? __put_seccomp_filter+0xa0/0xa0 [ 718.112904] ? __add_preferred_console.constprop.0+0x1a0/0x1a0 [ 718.112907] ? mark_held_locks+0xf0/0xf0 [ 718.112911] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 718.112915] ? __seccomp_filter+0xe4/0xca0 [ 718.112918] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 718.112922] ? __se_sys_copy_file_range+0x410/0x410 [ 718.112926] ? fsnotify_first_mark+0x200/0x200 [ 718.112929] ? fs_reclaim_release+0xd0/0x110 [ 718.112933] ? lock_acquire+0x170/0x3c0 [ 718.112936] ? kmem_cache_alloc+0x2b1/0x370 [ 718.112940] kmem_cache_alloc+0x110/0x370 [ 718.112943] prepare_creds+0x39/0x510 [ 718.112946] do_faccessat+0x94/0x7a0 [ 718.112950] ? __ia32_sys_fallocate+0x140/0x140 [ 718.112954] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.112958] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.112961] ? do_syscall_64+0x21/0x620 [ 718.112965] do_syscall_64+0xf9/0x620 [ 718.112969] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.112972] RIP: 0033:0x7efcc13f99c7 [ 718.112982] 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 [ 718.112986] RSP: 002b:00007ffe8ddcaf18 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 718.112995] RAX: ffffffffffffffda RBX: 00007ffe8ddcde30 RCX: 00007efcc13f99c7 [ 718.113000] RDX: 00007efcc1e6aa00 RSI: 0000000000000000 RDI: 000055df3fe769a3 [ 718.113005] RBP: 00007ffe8ddcaf50 R08: 0000000000000000 R09: 0000000000000000 [ 718.113010] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 718.113015] R13: 0000000000000000 R14: 00007ffe8ddcde30 R15: 00007ffe8ddcb440 [ 718.113246] Kernel panic - not syncing: hung_task: blocked tasks [ 718.462832] CPU: 0 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.470256] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 718.479593] Call Trace: [ 718.482198] dump_stack+0x1fc/0x2ef [ 718.485813] panic+0x26a/0x50e [ 718.488983] ? __warn_printk+0xf3/0xf3 [ 718.492847] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.497932] ? cpumask_next+0x3c/0x40 [ 718.501710] ? printk_safe_flush+0xd6/0x120 [ 718.506011] ? watchdog+0x991/0xe60 [ 718.509619] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.515052] watchdog+0x9a2/0xe60 [ 718.518489] ? reset_hung_task_detector+0x30/0x30 [ 718.523310] kthread+0x33f/0x460 [ 718.526658] ? kthread_park+0x180/0x180 [ 718.530610] ret_from_fork+0x24/0x30 [ 718.534567] Kernel Offset: disabled [ 718.538182] Rebooting in 86400 seconds..