INFO: task kworker/u4:0:10 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc5-syzkaller-00133-g25041a4c02c7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0    state:D stack:24200 pid:10    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 rwsem_down_write_slowpath+0x3e2/0x1220 kernel/locking/rwsem.c:1178
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0x1d2/0x200 kernel/locking/rwsem.c:1574
 f2fs_down_write fs/f2fs/f2fs.h:2112 [inline]
 f2fs_balance_fs+0x53a/0x6c0 fs/f2fs/segment.c:435
 f2fs_write_inode+0x4b0/0xd80 fs/f2fs/inode.c:759
 write_inode fs/fs-writeback.c:1456 [inline]
 __writeback_single_inode+0x9f2/0xdb0 fs/fs-writeback.c:1668
 writeback_sb_inodes+0x54d/0xe70 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1965
 wb_writeback+0x7e9/0xa50 fs/fs-writeback.c:2070
 wb_check_old_data_flush fs/fs-writeback.c:2170 [inline]
 wb_do_writeback fs/fs-writeback.c:2223 [inline]
 wb_workfn+0x765/0xfc0 fs/fs-writeback.c:2251
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u4:0/10:
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ffff888019266938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
 #1: ffffc900000f7db0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
 #2: ffff88807c1e80e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: trylock_super+0x21/0x110 fs/super.c:414
 #3: ffff88802bfa12a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2112 [inline]
 #3: ffff88802bfa12a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x53a/0x6c0 fs/f2fs/segment.c:435
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8c7984b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8c7981b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
 #0: ffffffff8c7990c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559
2 locks held by getty/4753:
 #0: ffff888029cc8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
1 lock held by sshd/4994:
3 locks held by syz-executor285/5009:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-00133-g25041a4c02c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x2a4/0x300 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+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x344/0x440 kernel/kthread.c:379
 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: 5009 Comm: syz-executor285 Not tainted 6.4.0-rc5-syzkaller-00133-g25041a4c02c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:58 [inline]
RIP: 0010:stack_access_ok+0x2c/0x1d0 arch/x86/kernel/unwind_orc.c:365
Code: 00 00 00 00 00 fc ff df 41 56 41 55 41 54 49 89 d4 48 89 fa 55 48 c1 ea 03 48 89 f5 53 48 89 fb 48 83 ec 08 0f b6 04 02 84 c0 <74> 08 3c 03 0f 8e 47 01 00 00 8b 0b 85 c9 74 65 48 8d 7b 08 48 b8
RSP: 0018:ffffc90003a9e570 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90003a9e618 RCX: ffffffff8eff8378
RDX: 1ffff92000753cc3 RSI: ffffc90003a9fef8 RDI: ffffc90003a9e618
RBP: ffffc90003a9fef8 R08: ffffffff8eff837c R09: ffffc90003a9fef8
R10: ffffc90003a9e618 R11: 0000000000094001 R12: 0000000000000008
R13: ffffc90003a9e618 R14: ffffc90003a9ff00 R15: ffffc90003a9e64c
FS:  00007f0f34427700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f388dd3f0 CR3: 000000007d335000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 deref_stack_reg arch/x86/kernel/unwind_orc.c:375 [inline]
 unwind_next_frame+0xacc/0x1e30 arch/x86/kernel/unwind_orc.c:557
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:711 [inline]
 slab_alloc_node mm/slub.c:3451 [inline]
 slab_alloc mm/slub.c:3459 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3466 [inline]
 kmem_cache_alloc_lru+0x20a/0x600 mm/slub.c:3482
 alloc_inode_sb include/linux/fs.h:2705 [inline]
 f2fs_alloc_inode+0x104/0x5c0 fs/f2fs/super.c:1383
 alloc_inode+0x61/0x230 fs/inode.c:260
 iget_locked+0x1bb/0x700 fs/inode.c:1286
 f2fs_iget+0x63/0x5560 fs/f2fs/inode.c:503
 gc_data_segment fs/f2fs/gc.c:1565 [inline]
 do_garbage_collect+0x280d/0x3e30 fs/f2fs/gc.c:1765
 f2fs_gc+0x862/0x1f20 fs/f2fs/gc.c:1865
 f2fs_balance_fs+0x547/0x6c0 fs/f2fs/segment.c:436
 f2fs_map_blocks+0x1957/0x3c10 fs/f2fs/data.c:1781
 f2fs_preallocate_blocks fs/f2fs/file.c:4501 [inline]
 f2fs_file_write_iter+0xfc0/0x24d0 fs/f2fs/file.c:4712
 __kernel_write_iter+0x262/0x7a0 fs/read_write.c:517
 dump_emit_page fs/coredump.c:888 [inline]
 dump_user_range+0x23c/0x710 fs/coredump.c:915
 elf_core_dump+0x277e/0x36e0 fs/binfmt_elf.c:2142
 do_coredump+0x2f2b/0x4020 fs/coredump.c:764
 get_signal+0x1c02/0x25b0 kernel/signal.c:2862
 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310
 exc_page_fault+0xc0/0x170 arch/x86/mm/fault.c:1593
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 002b:00000000200001c8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0f389306d8 RCX: 00007f0f3889c1e9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000080004000
RBP: 00007f0f389306d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0f389306dc
R13: 9958090000000000 R14: 0030656c69662f2e R15: 0000000000022000
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.983 msecs