[ 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 '10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 484.770242] EXT4-fs (loop0): mounted filesystem without journal. Opts: stripe=0x0000000000000006,grpquota,i_version,dioread_lock,max_dir_size_kb=0x0000000000000401,jqfmt=vfsv1,,errors=continue [ 717.792650] INFO: task syz-executor270:8137 blocked for more than 140 seconds. [ 717.800072] Not tainted 4.19.211-syzkaller #0 [ 717.805131] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.813189] syz-executor270 D26800 8137 8136 0x00000004 [ 717.818807] Call Trace: [ 717.821381] __schedule+0x887/0x2040 [ 717.825136] ? io_schedule_timeout+0x140/0x140 [ 717.829719] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.834361] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 717.839457] ? prepare_to_wait_exclusive+0x121/0x2d0 [ 717.844703] schedule+0x8d/0x1b0 [ 717.848102] io_schedule+0xb5/0x120 [ 717.851710] bit_wait_io+0x12/0x90 [ 717.855306] __wait_on_bit_lock+0xb5/0x170 [ 717.859537] ? bit_wait+0x90/0x90 [ 717.863047] out_of_line_wait_on_bit_lock+0xd2/0x100 [ 717.868171] ? __wait_on_bit_lock+0x170/0x170 [ 717.872718] ? lock_acquire+0x170/0x3c0 [ 717.876685] ? init_wait_var_entry+0x1a0/0x1a0 [ 717.881251] __lock_buffer+0x52/0x60 [ 717.885011] __sync_dirty_buffer+0x2a6/0x320 [ 717.889418] __ext4_handle_dirty_metadata+0x234/0x590 [ 717.894663] ext4_convert_inline_data_nolock+0x5c9/0xd10 [ 717.900109] ? ext4_read_inline_page+0x6f0/0x6f0 [ 717.904911] ext4_convert_inline_data+0x347/0x3a0 [ 717.909755] ? ext4_inline_data_truncate+0xa30/0xa30 [ 717.914910] ? common_file_perm+0x4e5/0x850 [ 717.919218] ? ext4_sync_file+0x5d8/0x1420 [ 717.923499] ext4_fallocate+0x137/0x2150 [ 717.927579] ? ext4_insert_range+0x1500/0x1500 [ 717.932145] vfs_fallocate+0x487/0x9a0 [ 717.936091] ioctl_preallocate+0x186/0x200 [ 717.940317] ? ioctl_file_clone+0x120/0x120 [ 717.944691] ? kernel_read+0x110/0x110 [ 717.948571] do_vfs_ioctl+0x1060/0x12e0 [ 717.952598] ? vfs_write+0x3d7/0x540 [ 717.956304] ? ioctl_preallocate+0x200/0x200 [ 717.960693] ? lock_downgrade+0x720/0x720 [ 717.964996] ? check_preemption_disabled+0x41/0x280 [ 717.970009] ? vfs_write+0x393/0x540 [ 717.973776] ? ksys_write+0x1c8/0x2a0 [ 717.977569] ksys_ioctl+0x9b/0xc0 [ 717.981003] __x64_sys_ioctl+0x6f/0xb0 [ 717.984935] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.989517] do_syscall_64+0xf9/0x620 [ 717.993373] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.998554] RIP: 0033:0x7f95c9e84299 [ 718.002246] Code: Bad RIP value. [ 718.005641] RSP: 002b:00007ffe37e5e618 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 718.013411] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f95c9e84299 [ 718.020669] RDX: 0000000020000080 RSI: 0000000040305828 RDI: 0000000000000004 [ 718.027971] RBP: 0000000000000000 R08: 00007f95c9ef2ec0 R09: 00007f95c9ef2ec0 [ 718.035296] R10: 00007f95c9ef2ec0 R11: 0000000000000246 R12: 00007ffe37e5e640 [ 718.042595] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 718.049878] [ 718.049878] Showing all locks held in the system: [ 718.056531] 1 lock held by khungtaskd/1570: [ 718.060832] #0: 000000009a6c85e8 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.069507] 2 locks held by syz-executor270/8137: [ 718.074401] #0: 0000000098bc3051 (sb_writers#3){.+.+}, at: vfs_fallocate+0x7c0/0x9a0 [ 718.082372] #1: 00000000fa5c93cd (&ei->xattr_sem){++++}, at: ext4_convert_inline_data+0x20a/0x3a0 [ 718.091548] [ 718.093268] ============================================= [ 718.093268] [ 718.100281] NMI backtrace for cpu 0 [ 718.103977] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.111413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.120748] Call Trace: [ 718.123320] dump_stack+0x1fc/0x2ef [ 718.126934] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.131411] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.135887] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.141143] watchdog+0x991/0xe60 [ 718.144577] ? reset_hung_task_detector+0x30/0x30 [ 718.149494] kthread+0x33f/0x460 [ 718.152842] ? kthread_park+0x180/0x180 [ 718.156796] ret_from_fork+0x24/0x30 [ 718.160599] Sending NMI from CPU 0 to CPUs 1: [ 718.165447] NMI backtrace for cpu 1 [ 718.165453] CPU: 1 PID: 4695 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 [ 718.165459] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.165463] RIP: 0010:rcu_is_watching+0x53/0xc0 [ 718.165473] Code: 00 af cf 89 48 89 f9 48 c1 e9 03 80 3c 11 00 75 6d 48 03 1c c5 00 af cf 89 be 04 00 00 00 48 8d 6b 10 48 89 ef e8 5d c2 46 00 <48> 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 [ 718.165477] RSP: 0018:ffff8880a0867ed8 EFLAGS: 00000246 [ 718.165485] RAX: ffffed101742455b RBX: ffff8880ba122ac0 RCX: ffffffff81518c83 [ 718.165490] RDX: ffffed101742455b RSI: 0000000000000004 RDI: ffff8880ba122ad0 [ 718.165495] RBP: ffff8880ba122ad0 R08: 0000000000000000 R09: ffffed101742455a [ 718.165500] R10: ffff8880ba122ad3 R11: 0000000000000000 R12: 0000000000001257 [ 718.165505] R13: ffff8880a31fd780 R14: 0000000000000000 R15: 0000000000000000 [ 718.165511] FS: 00007fee804658c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.165515] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.165520] CR2: 00007fee7d837000 CR3: 00000000a1120000 CR4: 00000000003406e0 [ 718.165525] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.165530] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.165533] Call Trace: [ 718.165536] __task_pid_nr_ns+0x39f/0x4c0 [ 718.165540] __ia32_sys_getpid+0x1a/0x20 [ 718.165543] do_syscall_64+0xf9/0x620 [ 718.165547] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.165550] RIP: 0033:0x7fee7f6fdf17 [ 718.165561] Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 [ 718.165565] RSP: 002b:00007fffe77cd4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 [ 718.165573] RAX: ffffffffffffffda RBX: 00005635f83021e0 RCX: 00007fee7f6fdf17 [ 718.165578] RDX: 00007fffe77cd5b8 RSI: 0000000000000001 RDI: 00005635f83021e0 [ 718.165583] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 718.165588] R10: 0000000000000069 R11: 0000000000000206 R12: 00007fffe77cd5b8 [ 718.165593] R13: 0000000000001257 R14: 00007fffe77d03a0 R15: 00007fffe77cd9b0 [ 718.166148] Kernel panic - not syncing: hung_task: blocked tasks [ 718.379594] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.387016] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 718.396353] Call Trace: [ 718.398936] dump_stack+0x1fc/0x2ef [ 718.402560] panic+0x26a/0x50e [ 718.405736] ? __warn_printk+0xf3/0xf3 [ 718.409605] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.414688] ? cpumask_next+0x3c/0x40 [ 718.418466] ? printk_safe_flush+0xd6/0x120 [ 718.422765] ? watchdog+0x991/0xe60 [ 718.426371] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.431799] watchdog+0x9a2/0xe60 [ 718.435236] ? reset_hung_task_detector+0x30/0x30 [ 718.440059] kthread+0x33f/0x460 [ 718.443422] ? kthread_park+0x180/0x180 [ 718.447382] ret_from_fork+0x24/0x30 [ 718.451347] Kernel Offset: disabled [ 718.454964] Rebooting in 86400 seconds..