INFO: task syz-executor.0:2357 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:9696  pid:2357  ppid:1954   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x68b/0x960 kernel/sched/core.c:6695
 schedule+0x68/0xc0 kernel/sched/core.c:6771
 __closure_sync+0x6b/0xa0 lib/closure.c:129
 closure_sync include/linux/closure.h:189 [inline]
 __bch2_write+0x1521/0x1650 fs/bcachefs/io_write.c:1489
 bch2_write+0x248/0x480 fs/bcachefs/io_write.c:1611
 closure_queue include/linux/closure.h:254 [inline]
 closure_call include/linux/closure.h:379 [inline]
 bch2_dio_write_loop fs/bcachefs/fs-io-direct.c:528 [inline]
 bch2_direct_write+0x769/0xc80 fs/bcachefs/fs-io-direct.c:646
 bch2_write_iter+0x9f/0x10b0 fs/bcachefs/fs-io-buffered.c:1048
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x35d/0x430 fs/read_write.c:584
 ksys_write+0x70/0xe0 fs/read_write.c:637
 do_syscall_64+0x46/0xc0
 entry_SYSCALL_64_after_hwframe+0x6f/0xd9
RIP: 0033:0x7f7fb207dd29
RSP: 002b:00007f7fb2dee0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7fb21abf80 RCX: 00007f7fb207dd29
RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f7fb20ca47e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000006 R14: 00007f7fb21abf80 R15: 00007fff475f5ca8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/28:
 #0: ffffffff8397ec40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 include/trace/events/initcall.h:48
2 locks held by getty/1389:
 #0: ffff888107e740a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002c732f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x218/0x8f0 drivers/tty/n_tty.c:2206
3 locks held by syz-executor.0/2357:
 #0: ffff88810ee470c8 (&f->f_pos_lock){....}-{3:3}, at: __fdget_pos+0xa1/0xc0 fs/file.c:1064
 #1: ffff8881093983e8 (sb_writers#14){....}-{0:0}, at: ksys_write+0x70/0xe0 fs/read_write.c:637
 #2: ffff8881790c8820 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
 #2: ffff8881790c8820 (&sb->s_type->i_mutex_key#18){....}-{3:3}, at: bch2_direct_write+0x66/0xc80 fs/bcachefs/fs-io-direct.c:592
1 lock held by bch-copygc/loop/2365:
2 locks held by syz-executor.0/4537:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x83/0xd0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x146/0x160 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x8e/0x140 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0x496/0x4c0 kernel/hung_task.c:379
 kthread+0xe9/0x100 kernel/kthread.c:388
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2365 Comm: bch-copygc/loop Not tainted 6.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:btree_path_node fs/bcachefs/btree_iter.h:39 [inline]
RIP: 0010:__btree_path_up_until_good_node+0x46/0x300 fs/bcachefs/btree_iter.c:1065
Code: c1 ed 0a 83 e5 07 48 8d 46 20 48 89 44 24 08 83 fd 03 0f 87 54 01 00 00 41 89 ee 01 ed 4b 8d 04 76 48 8b 4c 24 08 48 8d 1c c1 <48> 8b 03 48 85 c0 0f 84 33 01 00 00 41 89 ed 48 3d 00 f0 ff ff 0f
RSP: 0018:ffffc9000272b648 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffff8881092a4220 RCX: 0000000000000004
RDX: 00000000000000cf RSI: 0000000000000000 RDI: ffff8881092a4000
RBP: 0000000000000006 R08: ffff8881092a4000 R09: ffffc9000272b978
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8881092a41b8
R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7535ba8000 CR3: 0000000101f6c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 btree_path_up_until_good_node fs/bcachefs/btree_iter.c:1089 [inline]
 bch2_btree_path_traverse_one+0x908/0x9e0 fs/bcachefs/btree_iter.c:1129
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:215 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:1973 [inline]
 bch2_btree_iter_peek_upto+0x2ec/0xea0 fs/bcachefs/btree_iter.c:2077
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:624 [inline]
 bch2_copygc_get_buckets fs/bcachefs/movinggc.c:162 [inline]
 bch2_copygc+0x15f/0xf20 fs/bcachefs/movinggc.c:205
 bch2_copygc_thread+0x1ae/0x450 fs/bcachefs/movinggc.c:358
 kthread+0xe9/0x100 kernel/kthread.c:388
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:304
 </TASK>