bcachefs (loop0): journal_entry_open(): fatal error cannot start: journal seq overflow
============================================
WARNING: possible recursive locking detected
6.14.0-rc1-syzkaller-g92514ef226f5 #0 Not tainted
--------------------------------------------
kworker/0:1H/37 is trying to acquire lock:
ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: bch2_journal_halt+0x2f/0x110 fs/bcachefs/journal.c:314

but task is already holding lock:
ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: __journal_res_get+0x4b9/0x2630 fs/bcachefs/journal.c:532

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&j->lock);
  lock(&j->lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by kworker/0:1H/37:
 #0: ffff88803ebca548 ((wq_completion)bcachefs_btree_io){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
 #0: ffff88803ebca548 ((wq_completion)bcachefs_btree_io){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3317
 #1: ffffc90000587c60 ((work_completion)(&wb->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
 #1: ffffc90000587c60 ((work_completion)(&wb->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3317
 #2: ffff888049884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
 #2: ffff888049884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
 #2: ffff888049884378 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3377
 #3: ffff888043dc8140 (bcachefs_btree){+.+.}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:164 [inline]
 #3: ffff888043dc8140 (bcachefs_btree){+.+.}-{0:0}, at: srcu_read_lock include/linux/srcu.h:256 [inline]
 #3: ffff888043dc8140 (bcachefs_btree){+.+.}-{0:0}, at: __bch2_trans_get+0x7e4/0xd30 fs/bcachefs/btree_iter.c:3377
 #4: ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #4: ffff8880498ca980 (&j->lock){+.+.}-{3:3}, at: __journal_res_get+0x4b9/0x2630 fs/bcachefs/journal.c:532

stack backtrace:
CPU: 0 UID: 0 PID: 37 Comm: kworker/0:1H Not tainted 6.14.0-rc1-syzkaller-g92514ef226f5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: bcachefs_btree_io btree_node_write_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039
 check_deadlock kernel/locking/lockdep.c:3091 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 bch2_journal_halt+0x2f/0x110 fs/bcachefs/journal.c:314
 bch2_fs_emergency_read_only+0x50/0xc0 fs/bcachefs/super.c:407
 bch2_fatal_error+0x15/0x40 fs/bcachefs/error.c:49
 journal_entry_open fs/bcachefs/journal.c:384 [inline]
 __journal_res_get+0xc02/0x2630 fs/bcachefs/journal.c:556
 bch2_journal_res_get_slowpath+0xe7/0xb40 fs/bcachefs/journal.c:629
 bch2_journal_res_get fs/bcachefs/journal.h:384 [inline]
 bch2_trans_journal_res_get fs/bcachefs/btree_trans_commit.c:350 [inline]
 bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:652 [inline]
 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:866 [inline]
 __bch2_trans_commit+0x3541/0x97a0 fs/bcachefs/btree_trans_commit.c:1066
 bch2_trans_commit fs/bcachefs/btree_update.h:183 [inline]
 __bch2_btree_node_update_key fs/bcachefs/btree_update_interior.c:2410 [inline]
 bch2_btree_node_update_key+0x1b5d/0x30e0 fs/bcachefs/btree_update_interior.c:2478
 bch2_btree_node_update_key_get_iter+0x731/0x8c0 fs/bcachefs/btree_update_interior.c:2516
 btree_node_write_work+0x774/0xba0 fs/bcachefs/btree_io.c:1910
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>