INFO: task syz-executor.1:5066 blocked for more than 143 seconds.
      Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:20968 pid:5066  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6695
 schedule+0xc3/0x180 kernel/sched/core.c:6771
 wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
 __writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2650
 sync_filesystem+0xa4/0x220 fs/sync.c:54
 generic_shutdown_super+0x72/0x2c0 fs/super.c:666
 kill_block_super+0x41/0x70 fs/super.c:1646
 kill_f2fs_super+0x303/0x3b0 fs/f2fs/super.c:4883
 deactivate_locked_super+0xa4/0x110 fs/super.c:481
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6d1267de17
RSP: 002b:00007fff11e01ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6d1267de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff11e01d60
RBP: 00007fff11e01d60 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff11e02e20
R13: 00007f6d126c73b9 R14: 0000000000154424 R15: 000000000000000c
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xdf5/0xe40 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1093 Comm: kworker/u4:7 Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:io_serial_out+0x7e/0xc0 drivers/tty/serial/8250/8250_port.c:424
Code: fc 89 e9 41 d3 e7 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 ac 3f 23 fd 44 03 3b 44 89 f0 44 89 fa ee <5b> 41 5c 41 5e 41 5f 5d c3 89 e9 80 e1 07 38 c1 7c ab 48 89 ef e8
RSP: 0018:ffffc90004cfda10 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffffffff9221f260 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff84c442fb R09: fffff5200099fb24
R10: dffffc0000000000 R11: fffff5200099fb24 R12: dffffc0000000000
R13: ffffffff9221f278 R14: 0000000000000000 R15: 00000000000003f9
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff6c588d38 CR3: 0000000075a18000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 serial8250_console_write+0x32d/0x1820 drivers/tty/serial/8250/8250_port.c:3414
 console_emit_next_record kernel/printk/printk.c:2912 [inline]
 console_flush_all+0x75a/0xd50 kernel/printk/printk.c:2968
 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3037
 vprintk_emit+0xda/0x1f0 kernel/printk/printk.c:2309
 _printk+0xd5/0x120 kernel/printk/printk.c:2334
 f2fs_printk+0x36f/0x440 fs/f2fs/super.c:262
 f2fs_inode_chksum_verify+0x25f/0x360 fs/f2fs/inode.c:191
 __get_node_page+0x2c9/0xd90 fs/f2fs/node.c:1457
 gc_node_segment fs/f2fs/gc.c:1041 [inline]
 do_garbage_collect+0x15c2/0x8130 fs/f2fs/gc.c:1763
 f2fs_gc+0xeff/0x3160 fs/f2fs/gc.c:1869
 f2fs_balance_fs+0x549/0x730 fs/f2fs/segment.c:439
 f2fs_write_single_data_page+0xe60/0x1d60 fs/f2fs/data.c:2965
 f2fs_write_cache_pages fs/f2fs/data.c:3210 [inline]
 __f2fs_write_data_pages fs/f2fs/data.c:3360 [inline]
 f2fs_write_data_pages+0x1f9d/0x35b0 fs/f2fs/data.c:3387
 do_writepages+0x3a6/0x670 mm/page-writeback.c:2553
 __writeback_single_inode+0x155/0xfa0 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x8e3/0x11d0 fs/fs-writeback.c:1894
 wb_writeback+0x44d/0xc60 fs/fs-writeback.c:2070
 wb_do_writeback fs/fs-writeback.c:2217 [inline]
 wb_workfn+0x400/0xff0 fs/fs-writeback.c:2257
 process_one_work+0x781/0x1130 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0xabf/0x1060 kernel/workqueue.c:2784
 kthread+0x2b8/0x350 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>