[ 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 '10.128.1.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.696066] INFO: task syz-executor960:8113 blocked for more than 140 seconds. [ 717.703486] Not tainted 4.19.211-syzkaller #0 [ 717.709430] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.717487] syz-executor960 D27816 8113 8111 0x00000004 [ 717.723128] Call Trace: [ 717.725702] __schedule+0x887/0x2040 [ 717.729469] ? io_schedule_timeout+0x140/0x140 [ 717.734055] ? _raw_spin_unlock+0x29/0x40 [ 717.738274] schedule+0x8d/0x1b0 [ 717.741643] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.747393] ? fuse_do_ioctl+0x1850/0x1850 [ 717.751626] ? wait_woken+0x250/0x250 [ 717.755422] ? fuse_writepage_locked+0xb63/0x1010 [ 717.760318] ? fuse_writepage_locked+0x1010/0x1010 [ 717.765242] fuse_launder_page+0xb6/0xe0 [ 717.769353] invalidate_inode_pages2_range+0x795/0x1110 [ 717.774719] ? clear_shadow_entry+0x170/0x170 [ 717.779268] ? fuse_file_alloc+0x1d9/0x270 [ 717.783501] ? do_raw_spin_unlock+0x171/0x230 [ 717.788030] ? _raw_spin_unlock+0x29/0x40 [ 717.792174] ? fuse_do_open+0x1c4/0x500 [ 717.796195] fuse_finish_open+0x2e2/0x590 [ 717.800335] fuse_open_common+0x254/0x2c0 [ 717.804467] do_dentry_open+0x4aa/0x1160 [ 717.808562] ? fuse_open_common+0x2c0/0x2c0 [ 717.812880] ? inode_permission.part.0+0x10c/0x450 [ 717.817850] ? chown_common+0x550/0x550 [ 717.821814] ? inode_permission+0x3d/0x140 [ 717.826085] path_openat+0x793/0x2df0 [ 717.829883] ? path_lookupat+0x8d0/0x8d0 [ 717.833929] ? mark_held_locks+0xf0/0xf0 [ 717.838022] ? mark_held_locks+0xf0/0xf0 [ 717.842080] do_filp_open+0x18c/0x3f0 [ 717.845857] ? may_open_dev+0xf0/0xf0 [ 717.849698] ? lock_downgrade+0x720/0x720 [ 717.853850] ? lock_acquire+0x170/0x3c0 [ 717.857870] ? __alloc_fd+0x34/0x570 [ 717.861577] ? do_raw_spin_unlock+0x171/0x230 [ 717.866108] ? _raw_spin_unlock+0x29/0x40 [ 717.870248] ? __alloc_fd+0x28d/0x570 [ 717.874032] do_sys_open+0x3b3/0x520 [ 717.877788] ? filp_open+0x70/0x70 [ 717.881324] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.886722] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.891732] ? do_syscall_64+0x21/0x620 [ 717.895690] do_syscall_64+0xf9/0x620 [ 717.899541] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.904723] RIP: 0033:0x7fd3e64ba4c9 [ 717.908469] Code: Bad RIP value. [ 717.911822] RSP: 002b:00007fd3e646b2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 717.919566] RAX: ffffffffffffffda RBX: 00007fd3e654b4c0 RCX: 00007fd3e64ba4c9 [ 717.926870] RDX: 00007fd3e64ba4c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 717.934130] RBP: 00007fd3e6518164 R08: 0000000000000000 R09: 0000000000000000 [ 717.941428] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.948737] R13: 00007fd3e6514158 R14: 00007fd3e6516160 R15: 00007fd3e654b4c8 [ 717.956079] [ 717.956079] Showing all locks held in the system: [ 717.962397] 1 lock held by khungtaskd/1570: [ 717.966744] #0: 00000000dd6ceb0f (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.975352] 1 lock held by in:imklog/7815: [ 717.979622] 2 locks held by syz-executor960/8113: [ 717.984443] #0: 00000000c074f0f0 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.992447] #1: 000000003be5618e (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 718.002045] [ 718.003655] ============================================= [ 718.003655] [ 718.010706] NMI backtrace for cpu 0 [ 718.014322] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.021744] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.031076] Call Trace: [ 718.033645] dump_stack+0x1fc/0x2ef [ 718.037253] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.041726] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.046198] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.051455] watchdog+0x991/0xe60 [ 718.054894] ? reset_hung_task_detector+0x30/0x30 [ 718.059721] kthread+0x33f/0x460 [ 718.063064] ? kthread_park+0x180/0x180 [ 718.067017] ret_from_fork+0x24/0x30 [ 718.070792] Sending NMI from CPU 0 to CPUs 1: [ 718.075890] NMI backtrace for cpu 1 [ 718.075897] CPU: 1 PID: 4676 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.075903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.075907] RIP: 0010:unwind_next_frame+0x50f/0x1400 [ 718.075920] Code: 00 00 31 c0 e9 a4 fb ff ff 48 ba 00 00 00 00 00 fc ff df 4c 89 c6 49 8d 48 01 48 c1 ee 03 0f b6 34 16 48 89 cf 48 89 4c 24 20 <48> c1 ef 03 0f b6 14 17 4c 89 c7 83 e7 07 40 38 fe 40 0f 9e c7 40 [ 718.075925] RSP: 0018:ffff8880a188f9e0 EFLAGS: 00000a07 [ 718.075932] RAX: 0000000000000005 RBX: 1ffff11014311f45 RCX: ffffffff8c11b3f7 [ 718.075937] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff8c11b3f7 [ 718.075942] RBP: 0000000000000001 R08: ffffffff8c11b3f6 R09: ffffffff8c11b3d4 [ 718.075947] R10: ffff8880a188fb6f R11: 0000000000074071 R12: ffff8880a188fb58 [ 718.075952] R13: ffff8880a188fb45 R14: ffff8880a188fb10 R15: ffffffff8c11b3f2 [ 718.075958] FS: 00007fcedab068c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.075962] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.075967] CR2: 00007fced7ed8000 CR3: 00000000a2fe5000 CR4: 00000000003406e0 [ 718.075972] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.075977] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.075980] Call Trace: [ 718.075984] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.075988] ? deref_stack_reg+0x1d0/0x1d0 [ 718.075992] ? __unwind_start+0x5b8/0x960 [ 718.075995] ? should_fail+0x142/0x7b0 [ 718.075999] ? unwind_next_frame+0x1400/0x1400 [ 718.076003] ? check_preemption_disabled+0x41/0x280 [ 718.076007] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.076010] __save_stack_trace+0x9f/0x190 [ 718.076014] ? __lock_acquire+0x6de/0x3ff0 [ 718.076018] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.076021] kasan_kmalloc+0xeb/0x160 [ 718.076025] ? kmem_cache_alloc+0x110/0x370 [ 718.076028] ? getname_flags+0xce/0x590 [ 718.076032] ? do_mkdirat+0x8d/0x2d0 [ 718.076035] ? do_syscall_64+0xf9/0x620 [ 718.076039] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.076043] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 718.076047] ? __put_seccomp_filter+0xa0/0xa0 [ 718.076050] ? kmem_cache_free+0x7f/0x260 [ 718.076054] ? __put_cred+0x1de/0x250 [ 718.076057] ? do_faccessat+0x64e/0x7a0 [ 718.076060] ? do_syscall_64+0xf9/0x620 [ 718.076064] ? mark_held_locks+0xf0/0xf0 [ 718.076067] ? kmem_cache_free+0x226/0x260 [ 718.076071] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 718.076075] ? cache_alloc_refill+0x2f8/0x340 [ 718.076079] ? lock_downgrade+0x720/0x720 [ 718.076082] ? do_raw_spin_lock+0xcb/0x220 [ 718.076086] ? do_raw_spin_unlock+0x171/0x230 [ 718.076089] ? _raw_spin_unlock+0x29/0x40 [ 718.076093] ? cache_alloc_refill+0x2f8/0x340 [ 718.076097] ? kmem_cache_alloc+0x2b1/0x370 [ 718.076100] kmem_cache_alloc+0x110/0x370 [ 718.076103] getname_flags+0xce/0x590 [ 718.076106] do_mkdirat+0x8d/0x2d0 [ 718.076110] ? __ia32_sys_mknod+0x120/0x120 [ 718.076114] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.076118] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.076122] ? do_syscall_64+0x21/0x620 [ 718.076125] do_syscall_64+0xf9/0x620 [ 718.076129] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.076132] RIP: 0033:0x7fced9dc1687 [ 718.076143] Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 [ 718.076147] RSP: 002b:00007ffce70341d8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 [ 718.076155] RAX: ffffffffffffffda RBX: 00007ffce70370f0 RCX: 00007fced9dc1687 [ 718.076160] RDX: 00007fceda832a00 RSI: 00000000000001ed RDI: 0000556fff8318a0 [ 718.076165] RBP: 00007ffce7034210 R08: 0000000000000000 R09: 0000000000000000 [ 718.076170] R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 [ 718.076175] R13: 0000000000000000 R14: 00007ffce70370f0 R15: 00007ffce7034700 [ 718.076290] Kernel panic - not syncing: hung_task: blocked tasks [ 718.452716] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.460157] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.469487] Call Trace: [ 718.472057] dump_stack+0x1fc/0x2ef [ 718.475667] panic+0x26a/0x50e [ 718.478844] ? __warn_printk+0xf3/0xf3 [ 718.482710] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.487794] ? cpumask_next+0x3c/0x40 [ 718.491661] ? printk_safe_flush+0xd6/0x120 [ 718.495971] ? watchdog+0x991/0xe60 [ 718.499581] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.505011] watchdog+0x9a2/0xe60 [ 718.508536] ? reset_hung_task_detector+0x30/0x30 [ 718.513356] kthread+0x33f/0x460 [ 718.516702] ? kthread_park+0x180/0x180 [ 718.520667] ret_from_fork+0x24/0x30 [ 718.524701] Kernel Offset: disabled [ 718.528314] Rebooting in 86400 seconds..