INFO: task kworker/0:4:5137 blocked for more than 144 seconds.
      Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:24848 pid:5137  tgid:5137  ppid:2      flags:0x00004000
Workqueue: events_long bch2_fs_read_only_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 journal_quiesce fs/bcachefs/journal.c:474 [inline]
 journal_quiesce+0x274/0x2b0 fs/bcachefs/journal.c:472
 bch2_fs_journal_stop+0x186/0x400 fs/bcachefs/journal.c:1184
 __bch2_fs_read_only+0x334/0x500 fs/bcachefs/super.c:291
 bch2_fs_read_only+0x9b2/0xf10 fs/bcachefs/super.c:356
 bch2_fs_read_only_work+0x2c/0x40 fs/bcachefs/super.c:393
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.1.3045:19128 blocked for more than 145 seconds.
      Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3045      state:D stack:22200 pid:19128 tgid:19126 ppid:15153  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
 __bch2_fs_stop+0xf4/0x540 fs/bcachefs/super.c:614
 bch2_fs_stop fs/bcachefs/super.c:674 [inline]
 bch2_fs_open+0x761/0x1110 fs/bcachefs/super.c:2144
 bch2_mount+0xe2c/0x1230 fs/bcachefs/fs.c:1926
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1780
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0f70b7743a
RSP: 002b:00007f0f71954e78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0f71954f00 RCX: 00007f0f70b7743a
RDX: 00000000200004c0 RSI: 0000000020000100 RDI: 00007f0f71954ec0
RBP: 00000000200004c0 R08: 00007f0f71954f00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000100
R13: 00007f0f71954ec0 R14: 0000000000005d9f R15: 0000000020000380
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4839:
 #0: ffff88802aaeb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5073:
3 locks held by kworker/0:4/5137:
 #0: ffff888015481148 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
 #1: ffffc9000418fd80 ((work_completion)(&c->read_only_work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
 #2: ffff88806e100278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_read_only_work+0x24/0x40 fs/bcachefs/super.c:392
2 locks held by kworker/u8:12/9028:
1 lock held by syz.1.3045/19128:
 #0: ffff88806e100278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0xf4/0x540 fs/bcachefs/super.c:614

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

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf86/0x1240 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__splice_balance_callbacks kernel/sched/core.c:5078 [inline]
RIP: 0010:__balance_callbacks kernel/sched/core.c:5105 [inline]
RIP: 0010:__schedule+0x3a28/0x5d00 kernel/sched/core.c:6748
Code: 0b 00 00 e8 ca 60 81 f6 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 22 0f 00 00 4d 8b af 08 0b 00 00 <4d> 85 ed 0f 85 78 0c 00 00 48 c7 c0 d8 76 e4 8f 48 ba 00 00 00 00
RSP: 0018:ffffc900001a7c60 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888017e98000 RCX: 1ffff92000034f79
RDX: 1ffff11017267ed9 RSI: ffffffff8b2cb260 RDI: ffffffff8b8ff980
RBP: ffffc900001a7df0 R08: 0000000000000001 R09: ffffed1002fd3000
R10: ffff888017e98007 R11: 0000000000000001 R12: ffff8880b933f6c8
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880b933ebc0
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002003a000 CR3: 00000000260f2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 schedule_idle+0x59/0x90 kernel/sched/core.c:6863
 do_idle+0x287/0x3f0 kernel/sched/idle.c:360
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
 start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x148
 </TASK>