[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.255' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 491.446926] ====================================================== [ 491.446926] WARNING: the mand mount option is being deprecated and [ 491.446926] will be removed in v5.15! [ 491.446926] ====================================================== [ 491.488476] EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended [ 491.498172] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 717.414792] INFO: task syz-executor851:8114 blocked for more than 140 seconds. [ 717.422276] Not tainted 4.19.211-syzkaller #0 [ 717.428297] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.436502] syz-executor851 D25664 8114 8113 0x00000004 [ 717.442149] Call Trace: [ 717.444794] __schedule+0x887/0x2040 [ 717.448521] ? io_schedule_timeout+0x140/0x140 [ 717.453273] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.457929] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 717.463041] ? prepare_to_wait_exclusive+0x121/0x2d0 [ 717.468255] schedule+0x8d/0x1b0 [ 717.471642] io_schedule+0xb5/0x120 [ 717.475406] bit_wait_io+0x12/0x90 [ 717.480192] __wait_on_bit_lock+0xb5/0x170 [ 717.484428] ? bit_wait+0x90/0x90 [ 717.487955] out_of_line_wait_on_bit_lock+0xd2/0x100 [ 717.493065] ? __wait_on_bit_lock+0x170/0x170 [ 717.497760] ? lock_acquire+0x170/0x3c0 [ 717.501738] ? init_wait_var_entry+0x1a0/0x1a0 [ 717.506372] __lock_buffer+0x52/0x60 [ 717.510099] __sync_dirty_buffer+0x2a6/0x320 [ 717.514512] __ext4_handle_dirty_metadata+0x234/0x590 [ 717.519768] ext4_convert_inline_data_nolock+0x967/0xd10 [ 717.525298] ? ext4_read_inline_page+0x6f0/0x6f0 [ 717.530154] ? get_max_inline_xattr_value_size+0x3b4/0x4d0 [ 717.535861] ext4_try_add_inline_entry+0x338/0x570 [ 717.540823] ? ext4_da_write_inline_data_end+0x4d0/0x4d0 [ 717.546335] ext4_add_entry+0x33c/0xbb0 [ 717.550325] ? make_indexed_dir+0xee0/0xee0 [ 717.554704] ? common_perm+0x4be/0x800 [ 717.558603] ext4_mkdir+0x6f5/0xe10 [ 717.562225] ? ext4_init_dot_dotdot+0x600/0x600 [ 717.566997] ? generic_permission+0x116/0x4d0 [ 717.571641] ? inode_permission.part.0+0x10c/0x450 [ 717.576634] vfs_mkdir+0x508/0x7a0 [ 717.580195] do_mkdirat+0x262/0x2d0 [ 717.584092] ? __ia32_sys_mknod+0x120/0x120 [ 717.588925] ? trace_hardirqs_off_caller+0x6e/0x210 [ 717.594402] ? do_syscall_64+0x21/0x620 [ 717.598695] do_syscall_64+0xf9/0x620 [ 717.602604] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.607935] RIP: 0033:0x7f996efc7259 [ 717.611657] Code: Bad RIP value. [ 717.615076] RSP: 002b:00007ffe888d18d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 717.622791] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f996efc7259 [ 717.630133] RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000004 [ 717.637489] RBP: 0000000000000000 R08: 00007f996f035ec0 R09: 00007f996f035ec0 [ 717.644809] R10: 00007f996f035ec0 R11: 0000000000000246 R12: 00007ffe888d1900 [ 717.652165] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 717.659514] [ 717.659514] Showing all locks held in the system: [ 717.665904] 1 lock held by khungtaskd/1570: [ 717.670210] #0: 00000000771a61f9 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 717.678913] 1 lock held by in:imklog/7726: [ 717.683144] #0: 000000004947c36d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 717.691193] 3 locks held by syz-executor851/8114: [ 717.696178] #0: 00000000ab4d2a4e (sb_writers#3){.+.+}, at: mnt_want_write+0x3a/0xb0 [ 717.704072] #1: 00000000bfca778b (&type->i_mutex_dir_key#3/1){+.+.}, at: filename_create+0x15a/0x490 [ 717.713652] #2: 0000000075efa324 (&ei->xattr_sem){++++}, at: ext4_try_add_inline_entry+0xfc/0x570 [ 717.722852] [ 717.724484] ============================================= [ 717.724484] [ 717.731587] NMI backtrace for cpu 1 [ 717.735302] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 717.742830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 717.752171] Call Trace: [ 717.754753] dump_stack+0x1fc/0x2ef [ 717.758373] nmi_cpu_backtrace.cold+0x63/0xa2 [ 717.762894] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.767389] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 717.772669] watchdog+0x991/0xe60 [ 717.776137] ? reset_hung_task_detector+0x30/0x30 [ 717.780987] kthread+0x33f/0x460 [ 717.784340] ? kthread_park+0x180/0x180 [ 717.788333] ret_from_fork+0x24/0x30 [ 717.792150] Sending NMI from CPU 1 to CPUs 0: [ 717.797193] NMI backtrace for cpu 0 [ 717.797198] CPU: 0 PID: 10 Comm: rcu_preempt Not tainted 4.19.211-syzkaller #0 [ 717.797204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 717.797207] RIP: 0010:check_memory_region+0xcb/0x170 [ 717.797217] Code: 0e 80 38 00 74 f2 48 85 c0 0f 85 9c 00 00 00 5b 5d 41 5c c3 48 85 d2 74 f6 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 e8 80 38 00 <74> f2 eb d8 41 bc 08 00 00 00 48 89 ea 45 29 dc 4e 8d 5c 25 00 eb [ 717.797221] RSP: 0018:ffff8880b5a67b10 EFLAGS: 00000046 [ 717.797228] RAX: fffffbfff19ae805 RBX: fffffbfff19ae806 RCX: ffffffff814afa31 [ 717.797232] RDX: fffffbfff19ae806 RSI: 0000000000000004 RDI: ffffffff8cd74028 [ 717.797237] RBP: fffffbfff19ae805 R08: 0000000000000001 R09: fffffbfff19ae805 [ 717.797241] R10: ffffffff8cd7402b R11: 0000000000000000 R12: 0000000000000000 [ 717.797246] R13: ffff8880b5a4e280 R14: ffffffff89f889d8 R15: 0000000000000001 [ 717.797251] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 717.797255] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 717.797259] CR2: 00007f3f70d1a000 CR3: 00000000a108b000 CR4: 00000000003406f0 [ 717.797263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 717.797268] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 717.797270] Call Trace: [ 717.797274] __lock_acquire+0x251/0x3ff0 [ 717.797277] ? mark_held_locks+0xf0/0xf0 [ 717.797280] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.797284] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 717.797287] ? mark_held_locks+0xf0/0xf0 [ 717.797290] ? prepare_to_swait_event+0x16c/0x540 [ 717.797293] ? lock_downgrade+0x720/0x720 [ 717.797296] ? lock_acquire+0x170/0x3c0 [ 717.797300] ? prepare_to_swait_event+0x5b/0x540 [ 717.797303] ? rcu_gp_kthread+0x36b/0x21c0 [ 717.797306] lock_acquire+0x170/0x3c0 [ 717.797309] ? rcu_gp_kthread+0x505/0x21c0 [ 717.797312] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.797315] _raw_spin_lock+0x2a/0x40 [ 717.797318] ? rcu_gp_kthread+0x505/0x21c0 [ 717.797321] rcu_gp_kthread+0x505/0x21c0 [ 717.797324] ? lock_acquire+0x170/0x3c0 [ 717.797327] ? __rcu_read_unlock+0x160/0x160 [ 717.797331] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.797334] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.797338] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 717.797341] ? __kthread_parkme+0x133/0x1e0 [ 717.797344] ? __rcu_read_unlock+0x160/0x160 [ 717.797347] kthread+0x33f/0x460 [ 717.797350] ? kthread_park+0x180/0x180 [ 717.797353] ret_from_fork+0x24/0x30 [ 717.815246] Kernel panic - not syncing: hung_task: blocked tasks [ 718.039360] CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 [ 718.046791] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 718.056303] Call Trace: [ 718.058882] dump_stack+0x1fc/0x2ef [ 718.062859] panic+0x26a/0x50e [ 718.066057] ? __warn_printk+0xf3/0xf3 [ 718.069943] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.074422] ? ___preempt_schedule+0x16/0x18 [ 718.078818] ? watchdog+0x991/0xe60 [ 718.082438] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.087889] watchdog+0x9a2/0xe60 [ 718.091330] ? reset_hung_task_detector+0x30/0x30 [ 718.096159] kthread+0x33f/0x460 [ 718.099506] ? kthread_park+0x180/0x180 [ 718.103465] ret_from_fork+0x24/0x30 [ 718.107545] Kernel Offset: disabled [ 718.111181] Rebooting in 86400 seconds..