[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 640.288889] EXT4-fs (loop0): mounted filesystem without journal. Opts: errors=remount-ro,nombcache,usrquota,
[ 857.966862] INFO: task syz-executor291:7976 blocked for more than 140 seconds.
[ 857.974307] Not tainted 4.14.296-syzkaller #0
[ 857.980155] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 857.988180] syz-executor291 D26864 7976 7975 0x00000004
[ 857.993792] Call Trace:
[ 857.996362] __schedule+0x88b/0x1de0
[ 858.000283] ? mark_held_locks+0xa6/0xf0
[ 858.004339] ? io_schedule_timeout+0x140/0x140
[ 858.008952] schedule+0x8d/0x1b0
[ 858.012313] io_schedule+0xb5/0x120
[ 858.015918] bit_wait_io+0x12/0x90
[ 858.019493] __wait_on_bit_lock+0xc2/0x1d0
[ 858.023720] ? bit_wait+0x90/0x90
[ 858.027200] ? mark_buffer_dirty_inode+0x2ce/0x3a0
[ 858.032125] out_of_line_wait_on_bit_lock+0xbc/0xd0
[ 858.037202] ? __wait_on_bit_lock+0x1d0/0x1d0
[ 858.041690] ? bit_waitqueue+0x30/0x30
[ 858.045559] __lock_buffer+0x43/0x50
[ 858.049308] __sync_dirty_buffer+0x214/0x290
[ 858.053708] __ext4_handle_dirty_metadata+0x169/0x480
[ 858.058938] ext4_convert_inline_data_nolock+0x8d8/0xc60
[ 858.064383] ? ext4_read_inline_page+0x560/0x560
[ 858.069177] ext4_try_add_inline_entry+0x2a5/0x4a0
[ 858.074109] ? ext4_da_write_inline_data_end+0x410/0x410
[ 858.079601] ext4_add_entry+0x2ee/0xa40
[ 858.083573] ? ext4_prepare_inline_data+0x166/0x1c0
[ 858.088615] ? set_nlink+0xc4/0x120
[ 858.092244] ? make_indexed_dir+0xe20/0xe20
[ 858.096551] ext4_mkdir+0x5cf/0xbd0
[ 858.100226] ? ext4_init_dot_dotdot+0x5a0/0x5a0
[ 858.104888] ? security_inode_mkdir+0xca/0x100
[ 858.109502] vfs_mkdir+0x463/0x6e0
[ 858.113040] SyS_mkdirat+0x1fd/0x270
[ 858.116799] ? SyS_mknod+0x30/0x30
[ 858.120335] ? __do_page_fault+0x159/0xad0
[ 858.124550] ? do_syscall_64+0x4c/0x640
[ 858.128551] ? SyS_mknod+0x30/0x30
[ 858.132095] do_syscall_64+0x1d5/0x640
[ 858.135966] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 858.141185] RIP: 0033:0x7f8b568f6979
[ 858.144883] RSP: 002b:00007ffdfb48f9d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 858.152615] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8b568f6979
[ 858.159930] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003
[ 858.167224] RBP: 0000000000000000 R08: 00007f8b56964ec0 R09: 00007f8b56964ec0
[ 858.174483] R10: 00007f8b56964ec0 R11: 0000000000000246 R12: 00007ffdfb48fa00
[ 858.181790] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
[ 858.189123]
[ 858.189123] Showing all locks held in the system:
[ 858.195440] 1 lock held by khungtaskd/1533:
[ 858.199851] #0: (tasklist_lock){.+.+}, at: [<ffffffff87028579>] debug_show_all_locks+0x7c/0x21a
[ 858.208975] 1 lock held by in:imklog/7701:
[ 858.213189] #0: (&f->f_pos_lock){+.+.}, at: [<ffffffff818d7b5b>] __fdget_pos+0x1fb/0x2b0
[ 858.221639] 3 locks held by syz-executor291/7976:
[ 858.226470] #0: (sb_writers#3){.+.+}, at: [<ffffffff818e0bca>] mnt_want_write+0x3a/0xb0
[ 858.234844] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<ffffffff818a849a>] filename_create+0x12a/0x3f0
[ 858.244708] #2: (&ei->xattr_sem){++++}, at: [<ffffffff81b98fc2>] ext4_try_add_inline_entry+0xc2/0x4a0
[ 858.254295]
[ 858.255916] =============================================
[ 858.255916]
[ 858.263215] NMI backtrace for cpu 1
[ 858.266892] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.296-syzkaller #0
[ 858.274326] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 858.283674] Call Trace:
[ 858.286243] dump_stack+0x1b2/0x281
[ 858.289862] nmi_cpu_backtrace.cold+0x57/0x93
[ 858.294334] ? irq_force_complete_move+0x350/0x350
[ 858.299239] nmi_trigger_cpumask_backtrace+0x13a/0x180
[ 858.304496] watchdog+0x5b9/0xb40
[ 858.307936] ? hungtask_pm_notify+0x50/0x50
[ 858.312234] kthread+0x30d/0x420
[ 858.315574] ? kthread_create_on_node+0xd0/0xd0
[ 858.320221] ret_from_fork+0x24/0x30
[ 858.323978] Sending NMI from CPU 1 to CPUs 0:
[ 858.328741] NMI backtrace for cpu 0
[ 858.328745] CPU: 0 PID: 8 Comm: rcu_preempt Not tainted 4.14.296-syzkaller #0
[ 858.328749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 858.328752] task: ffff8880b540e200 task.stack: ffff8880b5418000
[ 858.328755] RIP: 0010:debug_smp_processor_id+0x0/0x20
[ 858.328757] RSP: 0018:ffff8880b541fdb8 EFLAGS: 00000046
[ 858.328762] RAX: 1ffffffff11ef4a8 RBX: 0000000000035000 RCX: 0000000000006190
[ 858.328766] RDX: 1ffffffff11ef4a2 RSI: 0000000000000001 RDI: ffffffff88f7a548
[ 858.328769] RBP: fffffbfff11ef512 R08: ffffffff8b9d3780 R09: 00000000000c0033
[ 858.328772] R10: ffff8880b540ea88 R11: ffff8880b540e200 R12: dffffc0000000000
[ 858.328776] R13: ffffffff88f7a500 R14: ffffffff88f7a540 R15: ffffffff88f7a500
[ 858.328779] FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[ 858.328782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 858.328786] CR2: 00007f429ba96000 CR3: 00000000a1b5e000 CR4: 00000000003406f0
[ 858.328789] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 858.328793] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 858.328794] Call Trace:
[ 858.328797] rcu_gp_kthread+0x11b0/0x1e60
[ 858.328799] ? force_qs_rnp+0x4f0/0x4f0
[ 858.328801] ? force_qs_rnp+0x4f0/0x4f0
[ 858.328803] kthread+0x30d/0x420
[ 858.328806] ? kthread_create_on_node+0xd0/0xd0
[ 858.328808] ret_from_fork+0x24/0x30
[ 858.328809] Code: 44 ff ff ff e8 32 99 64 fe eb a5 4c 89 ff e8 98 99 64 fe e9 c6 fe ff ff e8 8e 99 64 fe e9 9a fe ff ff 66 0f 1f 84 00 00 00 00 00 <e8> bb db 3a fe 48 c7 c6 c0 09 cd 87 48 c7 c7 00 0a cd 87 e9 a8
[ 858.329531] Kernel panic - not syncing: hung_task: blocked tasks
[ 858.489717] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.296-syzkaller #0
[ 858.497142] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 858.506481] Call Trace:
[ 858.509059] dump_stack+0x1b2/0x281
[ 858.512673] panic+0x1f9/0x42d
[ 858.515842] ? add_taint.cold+0x16/0x16
[ 858.519796] watchdog+0x5ca/0xb40
[ 858.523225] ? hungtask_pm_notify+0x50/0x50
[ 858.527529] kthread+0x30d/0x420
[ 858.530871] ? kthread_create_on_node+0xd0/0xd0
[ 858.535518] ret_from_fork+0x24/0x30
[ 858.539481] Kernel Offset: disabled
[ 858.543112] Rebooting in 86400 seconds..