INFO: task kworker/u4:18:13833 blocked for more than 143 seconds.
      Not tainted 5.15.137-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:18   state:D stack:19232 pid:13833 ppid:     2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:1)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x45b0 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:1478 [inline]
 __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1688
 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1913
 __writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1984
 wb_writeback+0x465/0xc50 fs/fs-writeback.c:2089
 wb_check_background_flush fs/fs-writeback.c:2155 [inline]
 wb_do_writeback fs/fs-writeback.c:2243 [inline]
 wb_workfn+0xd07/0x1130 fs/fs-writeback.c:2271
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 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: ffffffff8c91f020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3257:
 #0: ffff8880238b2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
3 locks held by kworker/1:21/13770:
 #0: ffff888011c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
 #1: ffffc900053dfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
 #2: ffffffff8c9235e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #2: ffffffff8c9235e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
4 locks held by kworker/u4:18/13833:
 #0: ffff888142ba4938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
 #1: ffffc90005897d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
 #2: ffff8880770b00e0 (&type->s_umount_key#61){++++}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:418
 #3: ffff888015581108 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x4d4/0x6a0 fs/f2fs/segment.c:529
2 locks held by kworker/1:20/7580:
 #0: ffff888011c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
 #1: ffffc90003f7fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
5 locks held by syz-executor.1/19402:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19402 Comm: syz-executor.1 Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:208 [inline]
RIP: 0010:bpf_ksym_find kernel/bpf/core.c:684 [inline]
RIP: 0010:is_bpf_text_address+0xa8/0x260 kernel/bpf/core.c:718
Code: 01 48 c7 c7 00 87 90 8a be ba 02 00 00 48 c7 c2 40 87 90 8a e8 19 16 d6 ff 49 bc 00 00 00 00 00 fc ff df 44 8b 3d 78 30 d4 0a <44> 89 fd 83 e5 01 48 8d 1c ed b0 f3 60 8c 48 89 d8 48 c1 e8 03 42
RSP: 0018:ffffc90005ec6420 EFLAGS: 00000246
RAX: ffffffff818cc29f RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90003ad5000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000170201 R08: ffffffff818cc28d R09: fffffbfff1f79a21
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffffff816dc590 R14: 00007f9408303ae9 R15: 000000000000017c
FS:  00007f94068856c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff35c64d000 CR3: 00000000905ce000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 kernel_text_address kernel/extable.c:151 [inline]
 __kernel_text_address+0x94/0x100 kernel/extable.c:105
 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
 arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xdd/0x160 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0x91/0x1f0 mm/slub.c:3515
 submit_bio_checks+0x323/0x1920 block/blk-core.c:903
 __submit_bio+0x5a1/0x850 block/blk-core.c:915
 __submit_bio_noacct_mq block/blk-core.c:1001 [inline]
 submit_bio_noacct+0x955/0xb30 block/blk-core.c:1031
 submit_bio+0x2dd/0x560 block/blk-core.c:1093
 f2fs_submit_page_read+0x24c/0x2c0 fs/f2fs/data.c:1050
 f2fs_get_read_data_page+0x455/0x6b0 fs/f2fs/data.c:1224
 f2fs_get_lock_data_page+0x54/0x250 fs/f2fs/data.c:1271
 move_data_page fs/f2fs/gc.c:1335 [inline]
 gc_data_segment fs/f2fs/gc.c:1546 [inline]
 do_garbage_collect+0x369a/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_map_blocks+0x1989/0x28d0 fs/f2fs/data.c:1672
 expand_inode_data+0x5ba/0x9d0 fs/f2fs/file.c:1697
 f2fs_fallocate+0x35a/0x820 fs/f2fs/file.c:1787
 vfs_fallocate+0x54a/0x6b0 fs/open.c:308
 ksys_fallocate fs/open.c:331 [inline]
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __x64_sys_fallocate+0xb9/0x100 fs/open.c:337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9408303ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f94068850c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f9408422f80 RCX: 00007f9408303ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f940834f47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9408422f80 R15: 00007ffc8cc3b018
 </TASK>