INFO: task syz.0.87:6911 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.87        state:D stack:0     pid:6911  tgid:6904  ppid:6411   flags:0x00000001
Call trace:
 __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x13d4/0x2418 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678
 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
 __mutex_lock kernel/locking/mutex.c:752 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
 __fdget_pos+0x218/0x2a4 fs/file.c:1187
 fdget_pos include/linux/file.h:76 [inline]
 ksys_read+0x8c/0x26c fs/read_write.c:610
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:627
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffff80008f74dfa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325
2 locks held by kworker/u8:6/1996:
 #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205
 #1: ffff80009fd97c20 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205
2 locks held by getty/6180:
 #0: ffff0000d2ca60a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009b52e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:3/6400:
 #0: ffff0000c0028948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x624/0x15b8 kernel/workqueue.c:3205
 #1: ffff8000a36a7c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6a0/0x15b8 kernel/workqueue.c:3205
 #2: ffff0000d19cb240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x32bc drivers/net/netdevsim/fib.c:1489
5 locks held by syz.1.28/6650:
 #0: ffff0000cb3c6420 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515
 #1: ffff0000efc58148 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:800 [inline]
 #1: ffff0000efc58148 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:63
 #2: ffff0000f3a80a18 (&c->snapshot_create_lock){.+.+}-{3:3}, at: bch2_truncate+0x134/0x274 fs/bcachefs/io_misc.c:290
 #3: ffff0000f3a842c0 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:150
 #4: ffff0000f3aa6690 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x588/0x15ac fs/bcachefs/btree_update_interior.c:1197
1 lock held by bch-reclaim/loo/6677:
1 lock held by syz.0.87/6905:
2 locks held by syz.0.87/6910:
 #0: ffff0000d6160348 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187
 #1: ffff0000efd44180 (&type->i_mutex_dir_key#15){.+.+}-{3:3}, at: iterate_dir+0x1c4/0x648 fs/readdir.c:101
1 lock held by syz.0.87/6911:
 #0: ffff0000d6160348 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187
1 lock held by syz.0.87/6912:
2 locks held by syz.0.568/9117:
1 lock held by syz.3.570/9137:
2 locks held by syz.2.571/9136:
 #0: ffff0000cea660e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x1b0/0x83c fs/super.c:344
 #1: ffff80008f5fa708 (wq_pool_mutex){+.+.}-{3:3}, at: apply_wqattrs_lock kernel/workqueue.c:5140 [inline]
 #1: ffff80008f5fa708 (wq_pool_mutex){+.+.}-{3:3}, at: alloc_workqueue+0x8b8/0x1a90 kernel/workqueue.c:5699

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