INFO: task syz.3.88:4932 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.88        state:D stack:0     pid:4932  ppid:4330   flags:0x00000001
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 rwsem_down_write_slowpath+0xba8/0x12cc kernel/locking/rwsem.c:1189
 __down_write_common kernel/locking/rwsem.c:1314 [inline]
 __down_write kernel/locking/rwsem.c:1323 [inline]
 down_write+0x84/0x88 kernel/locking/rwsem.c:1574
 inode_lock include/linux/fs.h:764 [inline]
 f2fs_file_write_iter+0x1d4/0x1cd4 fs/f2fs/file.c:4892
 call_write_iter include/linux/fs.h:2271 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3c8/0x7c8 fs/read_write.c:584
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
INFO: task syz.3.88:4933 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.88        state:D stack:0     pid:4933  ppid:4330   flags:0x00000009
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563
 schedule+0xc4/0x170 kernel/sched/core.c:6639
 rwsem_down_write_slowpath+0xba8/0x12cc kernel/locking/rwsem.c:1189
 __down_write_common kernel/locking/rwsem.c:1314 [inline]
 __down_write kernel/locking/rwsem.c:1323 [inline]
 down_write+0x84/0x88 kernel/locking/rwsem.c:1574
 inode_lock include/linux/fs.h:764 [inline]
 f2fs_fallocate+0x1bc/0x8c4 fs/f2fs/file.c:1887
 vfs_fallocate+0x4a4/0x5fc fs/open.c:323
 ksys_fallocate fs/open.c:346 [inline]
 __do_sys_fallocate fs/open.c:354 [inline]
 __se_sys_fallocate fs/open.c:352 [inline]
 __arm64_sys_fallocate+0xc4/0x114 fs/open.c:352
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015597db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffff8000155985d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
 #0: ffff800015597440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
2 locks held by kworker/1:2/112:
2 locks held by getty/4085:
 #0: ffff0000d6cdb098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001ea432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xfa8 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4339:
 #0: ffff0000d4f820e0 (&type->s_umount_key#54){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362
4 locks held by syz.3.88/4899:
3 locks held by syz.3.88/4932:
 #0: ffff0000d635a0e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x118/0x17c fs/file.c:1038
 #1: ffff0000de68e460 (sb_writers#19){.+.+}-{0:0}, at: vfs_write+0x254/0x7c8 fs/read_write.c:580
 #2: ffff0000f5759c68 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #2: ffff0000f5759c68 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: f2fs_file_write_iter+0x1d4/0x1cd4 fs/f2fs/file.c:4892
2 locks held by syz.3.88/4933:
 #0: ffff0000de68e460 (sb_writers#19){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3026 [inline]
 #0: ffff0000de68e460 (sb_writers#19){.+.+}-{0:0}, at: vfs_fallocate+0x434/0x5fc fs/open.c:322
 #1: ffff0000f5759c68 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline]
 #1: ffff0000f5759c68 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: f2fs_fallocate+0x1bc/0x8c4 fs/f2fs/file.c:1887
3 locks held by syz.4.874/9242:
1 lock held by syz.6.891/9266:

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