[ 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 '10.128.0.127' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1001.313219] INFO: task syz-executor104:7980 blocked for more than 140 seconds. [ 1001.320650] Not tainted 4.14.301-syzkaller #0 [ 1001.326956] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.335325] syz-executor104 D28048 7980 7978 0x00000004 [ 1001.340940] Call Trace: [ 1001.344095] __schedule+0x88b/0x1de0 [ 1001.347797] ? lock_acquire+0x170/0x3f0 [ 1001.351747] ? io_schedule_timeout+0x140/0x140 [ 1001.357085] ? _raw_spin_unlock+0x29/0x40 [ 1001.361218] ? fuse_writepage_locked+0xe80/0xe80 [ 1001.366574] schedule+0x8d/0x1b0 [ 1001.369931] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 1001.376129] ? fuse_do_ioctl+0x1570/0x1570 [ 1001.380349] ? end_page_writeback+0xe3/0x1c0 [ 1001.385303] ? wait_woken+0x230/0x230 [ 1001.389094] fuse_launder_page+0xa2/0xd0 [ 1001.393704] invalidate_inode_pages2_range+0x547/0xc00 [ 1001.398970] ? clear_shadow_entry+0x160/0x160 [ 1001.404033] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 1001.408947] ? fuse_file_alloc+0x1ca/0x260 [ 1001.413738] ? _raw_spin_unlock+0x29/0x40 [ 1001.417874] ? fuse_do_open+0x18e/0x460 [ 1001.421828] fuse_finish_open+0x262/0x500 [ 1001.426728] fuse_open_common+0x234/0x290 [ 1001.430864] do_dentry_open+0x44b/0xec0 [ 1001.436020] ? fuse_open_common+0x290/0x290 [ 1001.440333] ? __inode_permission+0xcd/0x2f0 [ 1001.445281] vfs_open+0x105/0x220 [ 1001.448723] path_openat+0x628/0x2970 [ 1001.452502] ? path_lookupat+0x780/0x780 [ 1001.457392] ? trace_hardirqs_on+0x10/0x10 [ 1001.461617] do_filp_open+0x179/0x3c0 [ 1001.465985] ? may_open_dev+0xe0/0xe0 [ 1001.469773] ? lock_downgrade+0x740/0x740 [ 1001.474456] ? do_raw_spin_unlock+0x164/0x220 [ 1001.478935] ? _raw_spin_unlock+0x29/0x40 [ 1001.483617] ? __alloc_fd+0x1be/0x490 [ 1001.487404] do_sys_open+0x296/0x410 [ 1001.491092] ? filp_open+0x60/0x60 [ 1001.495712] ? do_syscall_64+0x4c/0x640 [ 1001.499690] ? compat_SyS_openat+0x30/0x30 [ 1001.504529] do_syscall_64+0x1d5/0x640 [ 1001.508408] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 1001.514152] RIP: 0033:0x7fe46c4404c9 [ 1001.517847] RSP: 002b:00007fe46c3f12f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 1001.526110] RAX: ffffffffffffffda RBX: 00007fe46c4d14c0 RCX: 00007fe46c4404c9 [ 1001.533788] RDX: 00007fe46c4404c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 1001.541041] RBP: 00007fe46c49e164 R08: 0000000000000000 R09: 0000000000000000 [ 1001.548890] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 1001.556524] R13: 00007fe46c49a158 R14: 00007fe46c49c160 R15: 00007fe46c4d14c8 [ 1001.564166] [ 1001.564166] Showing all locks held in the system: [ 1001.570480] 1 lock held by khungtaskd/1533: [ 1001.574931] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1001.584049] 1 lock held by in:imklog/7689: [ 1001.588262] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 1001.596841] 2 locks held by syz-executor104/7980: [ 1001.601666] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 1001.610136] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 1001.620237] [ 1001.621843] ============================================= [ 1001.621843] [ 1001.629260] NMI backtrace for cpu 0 [ 1001.632878] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.301-syzkaller #0 [ 1001.640295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 1001.649619] Call Trace: [ 1001.652184] dump_stack+0x1b2/0x281 [ 1001.655831] nmi_cpu_backtrace.cold+0x57/0x93 [ 1001.660311] ? irq_force_complete_move+0x350/0x350 [ 1001.665225] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1001.670485] watchdog+0x5b9/0xb40 [ 1001.673915] ? hungtask_pm_notify+0x50/0x50 [ 1001.678211] kthread+0x30d/0x420 [ 1001.681548] ? kthread_create_on_node+0xd0/0xd0 [ 1001.686193] ret_from_fork+0x24/0x30 [ 1001.690001] Sending NMI from CPU 0 to CPUs 1: [ 1001.694904] NMI backtrace for cpu 1 [ 1001.694908] CPU: 1 PID: 4624 Comm: systemd-journal Not tainted 4.14.301-syzkaller #0 [ 1001.694912] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 1001.694916] task: ffff8880a16da140 task.stack: ffff8880a16e0000 [ 1001.694918] RIP: 0010:kernel_poison_pages+0x22/0x250 [ 1001.694921] RSP: 0018:ffff8880a16e7a00 EFLAGS: 00000046 [ 1001.694926] RAX: ffff8880a16da140 RBX: ffffea0002c48000 RCX: 0000000000000000 [ 1001.694929] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffea0002c48000 [ 1001.694933] RBP: 0000000000000002 R08: 0000000000001000 R09: ffffed1016240000 [ 1001.694936] R10: 0000000000000000 R11: ffff8880a16da140 R12: 0000000000000001 [ 1001.694940] R13: dffffc0000000000 R14: ffff88813fffb6c0 R15: ffffea0002c48000 [ 1001.694944] FS: 00007ff9952ee8c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 1001.694947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1001.694950] CR2: 00007ff9926be000 CR3: 00000000a32bf000 CR4: 00000000003406e0 [ 1001.694954] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1001.694957] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1001.694959] Call Trace: [ 1001.694962] get_page_from_freelist+0x16fd/0x25a0 [ 1001.694964] __alloc_pages_nodemask+0x352/0x2900 [ 1001.694967] ? __save_stack_trace+0xa0/0x160 [ 1001.694969] ? __lock_acquire+0x5fc/0x3f20 [ 1001.694972] ? seccomp_run_filters+0x151/0x540 [ 1001.694974] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 1001.694977] ? entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 1001.694980] ? __put_seccomp_filter+0x90/0x90 [ 1001.694982] ? __seccomp_filter+0xbd/0xdd0 [ 1001.694985] ? seccomp_send_sigsys+0x180/0x180 [ 1001.694987] cache_grow_begin+0x91/0x700 [ 1001.694989] ? fs_reclaim_release+0xd0/0x110 [ 1001.694992] ? check_preemption_disabled+0x35/0x240 [ 1001.694994] cache_alloc_refill+0x273/0x350 [ 1001.694997] kmem_cache_alloc+0x333/0x3c0 [ 1001.694999] getname_flags+0xc8/0x550 [ 1001.695001] SyS_mkdirat+0x83/0x270 [ 1001.695003] ? SyS_mknod+0x30/0x30 [ 1001.695005] ? do_syscall_64+0x4c/0x640 [ 1001.695008] ? SyS_mkdirat+0x270/0x270 [ 1001.695010] do_syscall_64+0x1d5/0x640 [ 1001.695013] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 1001.695015] RIP: 0033:0x7ff9945a9687 [ 1001.695018] RSP: 002b:00007ffc1eaf2e08 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 [ 1001.695023] RAX: ffffffffffffffda RBX: 00007ffc1eaf5e70 RCX: 00007ff9945a9687 [ 1001.695027] RDX: 0000000000000000 RSI: 00000000000001ed RDI: 00005645ac04e8a0 [ 1001.695030] RBP: 00007ffc1eaf2e40 R08: 00005645abf313e5 R09: 0000000000000018 [ 1001.695034] R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 [ 1001.695037] R13: 0000000000000001 R14: 00005645ac04e8a0 R15: 00007ffc1eaf3480 [ 1001.695039] Code: 05 b0 9e 8a 08 c3 0f 1f 00 41 57 41 56 41 55 41 54 41 89 d4 55 89 f5 53 48 89 fb 48 83 ec 08 e8 b5 b6 d6 ff 80 3d 8a 9e 8a 08 00 <0f> 84 c0 00 00 00 e8 a3 b6 d6 ff 45 85 e4 0f 84 c5 00 00 00 e8 [ 1001.695576] Kernel panic - not syncing: hung_task: blocked tasks [ 1001.976742] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.301-syzkaller #0 [ 1001.984163] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 1001.993488] Call Trace: [ 1001.996053] dump_stack+0x1b2/0x281 [ 1001.999653] panic+0x1f9/0x42d [ 1002.002817] ? add_taint.cold+0x16/0x16 [ 1002.006773] watchdog+0x5ca/0xb40 [ 1002.010199] ? hungtask_pm_notify+0x50/0x50 [ 1002.014494] kthread+0x30d/0x420 [ 1002.017832] ? kthread_create_on_node+0xd0/0xd0 [ 1002.022473] ret_from_fork+0x24/0x30 [ 1002.026425] Kernel Offset: disabled [ 1002.030034] Rebooting in 86400 seconds..