[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.103' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 717.603135] INFO: task syz-executor285:8115 blocked for more than 140 seconds. [ 717.610601] Not tainted 4.19.211-syzkaller #0 [ 717.616406] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.624630] syz-executor285 D26888 8115 8113 0x00000004 [ 717.630259] Call Trace: [ 717.632835] __schedule+0x887/0x2040 [ 717.636603] ? io_schedule_timeout+0x140/0x140 [ 717.641190] ? _raw_spin_unlock+0x29/0x40 [ 717.646046] schedule+0x8d/0x1b0 [ 717.649412] fuse_wait_on_page_writeback.isra.0+0x11b/0x170 [ 717.655161] ? fuse_do_ioctl+0x1850/0x1850 [ 717.659392] ? wait_woken+0x250/0x250 [ 717.663249] ? fuse_writepage_locked+0xb63/0x1010 [ 717.668089] ? fuse_writepage_locked+0x1010/0x1010 [ 717.673058] fuse_launder_page+0xb6/0xe0 [ 717.677121] invalidate_inode_pages2_range+0x795/0x1110 [ 717.682470] ? clear_shadow_entry+0x170/0x170 [ 717.687036] ? fuse_file_alloc+0x1d9/0x270 [ 717.691271] ? do_raw_spin_unlock+0x171/0x230 [ 717.695801] ? _raw_spin_unlock+0x29/0x40 [ 717.699949] ? fuse_do_open+0x1c4/0x500 [ 717.703981] fuse_finish_open+0x2e2/0x590 [ 717.708131] fuse_open_common+0x254/0x2c0 [ 717.712263] do_dentry_open+0x4aa/0x1160 [ 717.716367] ? fuse_open_common+0x2c0/0x2c0 [ 717.720688] ? inode_permission.part.0+0x10c/0x450 [ 717.725667] ? chown_common+0x550/0x550 [ 717.729645] ? inode_permission+0x3d/0x140 [ 717.733932] path_openat+0x793/0x2df0 [ 717.737739] ? path_lookupat+0x8d0/0x8d0 [ 717.741784] ? mark_held_locks+0xf0/0xf0 [ 717.745905] do_filp_open+0x18c/0x3f0 [ 717.749701] ? may_open_dev+0xf0/0xf0 [ 717.753545] ? lock_downgrade+0x720/0x720 [ 717.757688] ? lock_acquire+0x170/0x3c0 [ 717.761643] ? __alloc_fd+0x34/0x570 [ 717.765418] ? do_raw_spin_unlock+0x171/0x230 [ 717.769913] ? _raw_spin_unlock+0x29/0x40 [ 717.774533] ? __alloc_fd+0x28d/0x570 [ 717.778333] do_sys_open+0x3b3/0x520 [ 717.782028] ? filp_open+0x70/0x70 [ 717.785627] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.790988] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.796194] ? do_syscall_64+0x21/0x620 [ 717.800161] do_syscall_64+0xf9/0x620 [ 717.804021] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.809203] RIP: 0033:0x7f8cef8d24c9 [ 717.812900] Code: Bad RIP value. [ 717.816295] RSP: 002b:00007f8cef8832f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 717.824063] RAX: ffffffffffffffda RBX: 00007f8cef9634c0 RCX: 00007f8cef8d24c9 [ 717.831324] RDX: 00007f8cef8d24c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 717.838628] RBP: 00007f8cef930164 R08: 0000000000000000 R09: 0000000000000000 [ 717.845966] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 717.853268] R13: 00007f8cef92c158 R14: 00007f8cef92e160 R15: 00007f8cef9634c8 [ 717.860556] [ 717.860556] Showing all locks held in the system: [ 717.866948] 1 lock held by khungtaskd/1570: [ 717.871259] #0: 00000000d2b31673 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.879945] 2 locks held by syz-executor285/8115: [ 717.884933] #0: 000000009b757018 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.893042] #1: 0000000091fc88b6 (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0 [ 717.902587] [ 717.904274] ============================================= [ 717.904274] [ 717.911277] NMI backtrace for cpu 0 [ 717.914952] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.922394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 717.931727] Call Trace: [ 717.934298] dump_stack+0x1fc/0x2ef [ 717.937911] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.942389] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.946863] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 717.952123] watchdog+0x991/0xe60 [ 717.955561] ? reset_hung_task_detector+0x30/0x30 [ 717.960383] kthread+0x33f/0x460 [ 717.963729] ? kthread_park+0x180/0x180 [ 717.967770] ret_from_fork+0x24/0x30 [ 717.971568] Sending NMI from CPU 0 to CPUs 1: [ 717.976667] NMI backtrace for cpu 1 [ 717.976673] CPU: 1 PID: 4695 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 717.976679] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 717.976683] RIP: 0010:__rcu_read_lock+0x14/0x40 [ 717.976693] Code: 8d a7 08 f0 83 44 24 fc 00 48 83 c0 07 48 83 e0 fc c3 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 53 65 48 8b 1c 25 c0 df 01 00 <48> 8d bb 70 03 00 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 [ 717.976697] RSP: 0018:ffff8880a08afaa8 EFLAGS: 00000293 [ 717.976705] RAX: dffffc0000000000 RBX: ffff8880a08a6640 RCX: 0000000000000000 [ 717.976710] RDX: 0000000000000000 RSI: ffffffff816d10ac RDI: 00007fe4ed1b19c7 [ 717.976715] RBP: 00007fe4ed1b19c7 R08: 0000000000000000 R09: ffffed101742455a [ 717.976720] R10: ffff8880ba122ad3 R11: 0000000000074071 R12: ffff8880a08afbc0 [ 717.976725] R13: 0000000000000000 R14: ffff88813be45b00 R15: 00000000000000b8 [ 717.976730] FS: 00007fe4edef68c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 717.976734] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 717.976739] CR2: 00007fe4eb2c9000 CR3: 00000000a1845000 CR4: 00000000003406e0 [ 717.976744] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 717.976749] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 717.976752] Call Trace: [ 717.976756] is_bpf_text_address+0x11/0x1b0 [ 717.976759] kernel_text_address+0xbd/0xf0 [ 717.976763] __kernel_text_address+0x9/0x30 [ 717.976767] unwind_get_return_address+0x51/0x90 [ 717.976771] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.976774] __save_stack_trace+0xaf/0x190 [ 717.976778] kasan_kmalloc+0xeb/0x160 [ 717.976781] ? kmem_cache_alloc+0x110/0x370 [ 717.976784] ? prepare_creds+0x39/0x510 [ 717.976788] ? do_faccessat+0x94/0x7a0 [ 717.976791] ? do_syscall_64+0xf9/0x620 [ 717.976795] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.976799] ? __put_seccomp_filter+0xa0/0xa0 [ 717.976803] ? __lock_acquire+0x6de/0x3ff0 [ 717.976806] ? mark_held_locks+0xf0/0xf0 [ 717.976810] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 717.976814] ? __seccomp_filter+0xe4/0xca0 [ 717.976817] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 717.976821] ? mark_held_locks+0xf0/0xf0 [ 717.976825] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.976828] ? fs_reclaim_release+0xd0/0x110 [ 717.976832] ? lock_acquire+0x170/0x3c0 [ 717.976835] ? kmem_cache_alloc+0x2b1/0x370 [ 717.976839] kmem_cache_alloc+0x110/0x370 [ 717.976842] prepare_creds+0x39/0x510 [ 717.976845] do_faccessat+0x94/0x7a0 [ 717.976849] ? __ia32_sys_fallocate+0x140/0x140 [ 717.976853] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 717.976857] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.976860] ? do_syscall_64+0x21/0x620 [ 717.976864] do_syscall_64+0xf9/0x620 [ 717.976868] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.976871] RIP: 0033:0x7fe4ed1b19c7 [ 717.976881] 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 [ 717.976885] RSP: 002b:00007fffdd8af138 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 717.976894] RAX: ffffffffffffffda RBX: 00007fffdd8b2160 RCX: 00007fe4ed1b19c7 [ 717.976899] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000558cd48269a3 [ 717.976904] RBP: 00007fffdd8af280 R08: 0000558cd481c3e5 R09: 0000000000000018 [ 717.976909] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 717.976913] R13: 0000000000000000 R14: 0000558cd4b178a0 R15: 00007fffdd8af770 [ 717.977114] Kernel panic - not syncing: hung_task: blocked tasks [ 718.313835] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.321260] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.330595] Call Trace: [ 718.333167] dump_stack+0x1fc/0x2ef [ 718.336777] panic+0x26a/0x50e [ 718.339951] ? __warn_printk+0xf3/0xf3 [ 718.343822] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.349042] ? cpumask_next+0x3c/0x40 [ 718.352829] ? printk_safe_flush+0xd6/0x120 [ 718.357141] ? watchdog+0x991/0xe60 [ 718.360780] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.366233] watchdog+0x9a2/0xe60 [ 718.369673] ? reset_hung_task_detector+0x30/0x30 [ 718.374507] kthread+0x33f/0x460 [ 718.377862] ? kthread_park+0x180/0x180 [ 718.381822] ret_from_fork+0x24/0x30 [ 718.385842] Kernel Offset: disabled [ 718.389461] Rebooting in 86400 seconds..