INFO: task syz-executor136:5084 blocked for more than 143 seconds.
      Not tainted 6.2.0-next-20230303-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor136 state:D stack:25344 pid:5084  ppid:5083   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5305 [inline]
 __schedule+0x24b4/0x5ac0 kernel/sched/core.c:6623
 schedule+0xde/0x1a0 kernel/sched/core.c:6699
 io_schedule+0xbe/0x130 kernel/sched/core.c:8885
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x11f/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xd9/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer fs/buffer.c:70 [inline]
 lock_buffer include/linux/buffer_head.h:400 [inline]
 __sync_dirty_buffer+0x30e/0x380 fs/buffer.c:2780
 __ext4_handle_dirty_metadata+0x2b7/0x8e0 fs/ext4/ext4_jbd2.c:387
 ext4_convert_inline_data_nolock+0x6e6/0xf10 fs/ext4/inline.c:1255
 ext4_convert_inline_data+0x51a/0x5f0 fs/ext4/inline.c:2066
 ext4_fallocate+0x19a/0x4470 fs/ext4/extents.c:4701
 vfs_fallocate+0x48b/0xe40 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xd3/0x140 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fbd8b4a1229
RSP: 002b:00007ffd53a2b0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbd8b4a1229
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007fbd8b50fec0 R09: 00007fbd8b50fec0
R10: 00000000001000f4 R11: 0000000000000246 R12: 00007ffd53a2b110
R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8c7964f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8c7961f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8c797040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6495
2 locks held by getty/4762:
 #0: ffff888027e24098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
3 locks held by syz-executor136/5084:
 #0: ffff888079eaa460 (sb_writers#4){.+.+}-{0:0}, at: ksys_fallocate fs/open.c:347 [inline]
 #0: ffff888079eaa460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_fallocate fs/open.c:355 [inline]
 #0: ffff888079eaa460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_fallocate fs/open.c:353 [inline]
 #0: ffff888079eaa460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_fallocate+0xd3/0x140 fs/open.c:353
 #1: ffff888077a9b628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff888077a9b628 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x192/0x4470 fs/ext4/extents.c:4700
 #2: ffff888077a9b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
 #2: ffff888077a9b2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x352/0x5f0 fs/ext4/inline.c:2064

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-next-20230303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x316/0x3e0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x3a7/0x460 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe94/0x11e0 kernel/hung_task.c:379
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.2.0-next-20230303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:ktime_get+0x4/0x470 kernel/time/timekeeping.c:837
Code: e9 cc fd ff ff 4c 89 e7 e8 c9 8f 62 00 e9 89 fd ff ff e8 bf 8f 62 00 eb a5 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa <41> 57 41 56 41 55 41 54 55 53 48 83 ec 18 e8 a9 24 10 00 8b 1d 7f
RSP: 0018:ffffffff8c407e08 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff8880b982c120 RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff81780866 RDI: 0000000000000007
RBP: ffff8880b982c16c R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005562de876680 CR3: 000000000c571000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tick_nohz_start_idle kernel/time/tick-sched.c:672 [inline]
 tick_nohz_idle_enter+0x14a/0x250 kernel/time/tick-sched.c:1160
 do_idle+0x88/0x440 kernel/sched/idle.c:256
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379
 rest_init+0x16d/0x2b0 init/main.c:732
 arch_call_rest_init+0x13/0x30 init/main.c:894
 start_kernel+0x35a/0x4d0 init/main.c:1148
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>