INFO: task kworker/u4:10:4338 blocked for more than 143 seconds.
      Not tainted 5.15.110-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:10   state:D stack:19040 pid: 4338 ppid:     2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:4)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x4590 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 rwsem_down_write_slowpath+0xebb/0x15c0 kernel/locking/rwsem.c:1157
 __down_write_common kernel/locking/rwsem.c:1284 [inline]
 __down_write kernel/locking/rwsem.c:1293 [inline]
 down_write+0x164/0x170 kernel/locking/rwsem.c:1542
 f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
 f2fs_write_inode+0x4c3/0x540 fs/f2fs/inode.c:727
 write_inode fs/fs-writeback.c:1475 [inline]
 __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1680
 writeback_sb_inodes+0xbf0/0x1a50 fs/fs-writeback.c:1905
 __writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1976
 wb_writeback+0x465/0xc50 fs/fs-writeback.c:2081
 wb_check_old_data_flush fs/fs-writeback.c:2181 [inline]
 wb_do_writeback fs/fs-writeback.c:2234 [inline]
 wb_workfn+0xc55/0x1130 fs/fs-writeback.c:2263
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2306
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91c4e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3261:
 #0: ffff88814b2de098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900024a42e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
4 locks held by kworker/u4:10/4338:
 #0: ffff8881425c4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
 #1: ffffc9000472fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
 #2: ffff8881477800e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
 #3: ffff88801e299108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
4 locks held by kworker/u4:16/4769:
 #0: ffff8881425c4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
 #1: ffffc90004c0fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
 #2: ffff88803f19a0e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
 #3: ffff88802470d108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
4 locks held by kworker/u4:12/12808:
 #0: ffff8881425c4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2279
 #1: ffffc90002e1fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2281
 #2: ffff8880799fe0e0 (&type->s_umount_key#53){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
 #3: ffff88801d519108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
2 locks held by syz-executor.4/16570:
2 locks held by syz-executor.3/16652:
2 locks held by syz-executor.2/16653:

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16570 Comm: syz-executor.4 Not tainted 5.15.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:__get_node_page+0x54b/0x820 fs/f2fs/node.c:1422
Code: 00 00 e8 98 fc 28 fe f0 80 23 fb 4c 89 ff be 01 00 00 00 e8 e7 27 ff ff 4c 89 f0 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <e8> a0 a0 df fd 4c 89 e7 be 01 00 00 00 e8 c3 27 ff ff 4c 63 f3 eb
RSP: 0018:ffffc9000502da70 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 00000000fffffffe RCX: ffffffff83a03618
RDX: ffff88802303d700 RSI: 00000000fffffffe RDI: 0000000000000000
RBP: 0000000000000103 R08: ffffffff83a039bd R09: fffff94000407289
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0002039440
R13: ffff88801e298000 R14: 0000000000000001 R15: dffffc0000000000
FS:  00007f3c2b6db700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda6ddadef8 CR3: 0000000019f6d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_read_inode fs/f2fs/inode.c:349 [inline]
 f2fs_iget+0x61d/0x49c0 fs/f2fs/inode.c:505
 gc_data_segment fs/f2fs/gc.c:1476 [inline]
 do_garbage_collect+0x2821/0x7600 fs/f2fs/gc.c:1670
 f2fs_gc+0x9e5/0x1ad0 fs/f2fs/gc.c:1764
 f2fs_balance_fs+0x4e8/0x6a0 fs/f2fs/segment.c:530
 f2fs_write_single_data_page+0xc2a/0x1830 fs/f2fs/data.c:2866
 f2fs_write_cache_pages fs/f2fs/data.c:3079 [inline]
 __f2fs_write_data_pages fs/f2fs/data.c:3230 [inline]
 f2fs_write_data_pages+0x17de/0x2c00 fs/f2fs/data.c:3257
 do_writepages+0x481/0x730 mm/page-writeback.c:2364
 filemap_fdatawrite_wbc+0x1d6/0x230 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 file_write_and_wait_range+0x1cb/0x2b0 mm/filemap.c:810
 f2fs_do_sync_file+0x650/0x19d0 fs/f2fs/file.c:274
 generic_write_sync include/linux/fs.h:2913 [inline]
 f2fs_file_write_iter+0x476/0xb80 fs/f2fs/file.c:4357
 __kernel_write+0x5b1/0xa60 fs/read_write.c:539
 __dump_emit+0x264/0x3a0 fs/coredump.c:875
 dump_user_range+0x91/0x320 fs/coredump.c:949
 elf_core_dump+0x3c7d/0x4570 fs/binfmt_elf.c:2285
 do_coredump+0x1852/0x31e0 fs/coredump.c:826
 get_signal+0xc06/0x14e0 kernel/signal.c:2875
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:314
 exc_page_fault+0x342/0x740 arch/x86/mm/fault.c:1544
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 002b:0000000020000188 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3c2d288f80 RCX: 00007f3c2d169169
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f3c2d1c4ca1 R08: 0000000020000240 R09: 0000000020000240
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc1abbe0cf R14: 00007f3c2b6db300 R15: 0000000000022000
 </TASK>