INFO: task bch-copygc/loop:5231 blocked for more than 143 seconds.
      Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:19600 pid:5231  tgid:5231  ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 __closure_sync+0x259/0x2f0 lib/closure.c:146
 bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:238 [inline]
 __bch2_write+0x55a7/0x5d20 fs/bcachefs/io_write.c:1506
 bch2_write+0x947/0x1670 fs/bcachefs/io_write.c:1633
 closure_queue include/linux/closure.h:270 [inline]
 closure_call include/linux/closure.h:432 [inline]
 bch2_data_update_read_done+0x22e/0x330 fs/bcachefs/data_update.c:423
 move_write fs/bcachefs/move.c:133 [inline]
 bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:164
 bch2_move_ratelimit+0x76c/0xeb0 fs/bcachefs/move.c:492
 bch2_evacuate_bucket+0x2618/0x34d0 fs/bcachefs/move.c:702
 bch2_copygc+0x3a03/0x4650 fs/bcachefs/movinggc.c:234
 bch2_copygc_thread+0x737/0xc20 fs/bcachefs/movinggc.c:375
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 #0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
3 locks held by klogd/4661:
 #0: ffff8880b883e718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
 #1: ffffffff8e8414e0 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 #1: ffffffff8e8414e0 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: put_cpu_partial+0x70/0x250 mm/slub.c:3096
 #2: ffff88807e9cc618 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline]
 #2: ffff88807e9cc618 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051
2 locks held by getty/4982:
 #0: ffff8880308fc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor423/5790:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5790 Comm: syz-executor423 Not tainted 6.11.0-syzkaller-02574-ga430d95c5efa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:lookup_page_ext mm/page_ext.c:250 [inline]
RIP: 0010:page_ext_get+0xd2/0x2a0 mm/page_ext.c:526
Code: f8 8b be 48 03 00 00 48 c7 c2 40 46 f8 8b e8 15 1d 6c ff 49 bf 00 00 00 00 00 fc ff df 48 b8 00 00 00 00 00 16 00 00 48 01 c3 <49> 89 dc 49 c1 fc 06 48 bd c0 ff ff ff ff 00 00 00 48 89 ef 48 89
RSP: 0018:ffffc900042672b0 EFLAGS: 00000203
RAX: 0000160000000000 RBX: 0000000001b88f80 RCX: ffff88802e088000
RDX: 0000000000000000 RSI: ffffffff8c3fd520 RDI: ffffffff8c3fd4e0
RBP: 0000000000000001 R08: ffffffff82042c51 R09: 1ffffffff27fe508
R10: dffffc0000000000 R11: fffffbfff27fe509 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff82042c20 R15: dffffc0000000000
FS:  00005555777b8380(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb417ff000 CR3: 0000000031324000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __page_table_check_zero+0xb1/0x350 mm/page_table_check.c:148
 page_table_check_alloc include/linux/page_table_check.h:33 [inline]
 post_alloc_hook+0x206/0x230 mm/page_alloc.c:1501
 prep_new_page mm/page_alloc.c:1508 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
 folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2281
 shmem_alloc_folio mm/shmem.c:1722 [inline]
 shmem_alloc_and_add_folio+0x2cf/0x14f0 mm/shmem.c:1782
 shmem_get_folio_gfp+0x8dc/0x2370 mm/shmem.c:2188
 shmem_get_folio mm/shmem.c:2293 [inline]
 shmem_write_begin+0x170/0x450 mm/shmem.c:2898
 generic_perform_write+0x37e/0x730 mm/filemap.c:4025
 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3073
 new_sync_write fs/read_write.c:590 [inline]
 vfs_write+0xa6d/0xc90 fs/read_write.c:683
 ksys_write+0x1a0/0x2c0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb48d54e60
Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 21 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
RSP: 002b:00007ffd012fe3e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffd012fe400 RCX: 00007fcb48d54e60
RDX: 0000000001000000 RSI: 00007fcb40800000 RDI: 0000000000000003
RBP: 00007fcb40800000 R08: 0000000000005db3 R09: 0000000000005daf
R10: 0000000000000032 R11: 0000000000000202 R12: 00007ffd012fe5a0
R13: 00007ffd012fe440 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.842 msecs