INFO: task bch-copygc/loop:5238 blocked for more than 143 seconds.
      Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:20272 pid:5238  tgid:5238  ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 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
 move_buckets_wait+0x2ba/0x1290 fs/bcachefs/movinggc.c:114
 bch2_copygc_thread+0x83f/0xc20 fs/bcachefs/movinggc.c:386
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/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: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e938b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701
2 locks held by getty/4986:
 #0: ffff88803262a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #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+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/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: 5911 Comm: syz-executor304 Not tainted 6.11.0-syzkaller-05591-g2a17bb8c204f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__rcu_read_unlock+0x7d/0x110 kernel/rcu/tree_plugin.h:442
Code: 04 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 88 00 00 00 41 83 3f 00 75 29 42 0f b6 04 23 84 c0 75 62 41 8b 45 00 <3d> 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f 5d e9 88 fc 74 0a
RSP: 0018:ffffc90002d3f540 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff1100dff8088 RCX: ffffc90002d3f403
RDX: 0000000000000002 RSI: ffffffff8c0aea00 RDI: ffffffff8c60c080
RBP: 0000000000000000 R08: ffffffff901c022f R09: 1ffffffff2038045
R10: dffffc0000000000 R11: fffffbfff2038046 R12: dffffc0000000000
R13: ffff88806ffc0444 R14: ffff88806ffc0000 R15: ffff88806ffc0448
FS:  00005555819ce380(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc7bb50650 CR3: 000000002789a000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 filemap_unaccount_folio+0x343/0xe90 mm/filemap.c:194
 __filemap_remove_folio+0xc4/0x9e0 mm/filemap.c:231
 filemap_remove_folio+0x108/0x2e0 mm/filemap.c:264
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:178
 shmem_undo_range+0x45d/0x1df0 mm/shmem.c:1019
 shmem_truncate_range mm/shmem.c:1132 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1260
 evict+0x4ea/0x9b0 fs/inode.c:731
 __dentry_kill+0x20d/0x630 fs/dcache.c:615
 dput+0x19f/0x2b0 fs/dcache.c:857
 __fput+0x5d2/0x880 fs/file_table.c:439
 __do_sys_close fs/open.c:1565 [inline]
 __se_sys_close fs/open.c:1550 [inline]
 __x64_sys_close+0x7f/0x110 fs/open.c:1550
 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: 0033:0x7efc7bb160b0
Code: ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 80 3d d1 ef 07 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
RSP: 002b:00007ffe63165618 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007ffe63165630 RCX: 00007efc7bb160b0
RDX: 0000000000000010 RSI: 0000000000004c00 RDI: 0000000000000003
RBP: 0000000000000004 R08: 0000000000005db3 R09: 0000000000005daf
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000044
R13: 00007ffe63165670 R14: 0000000000000003 R15: 00005555819ce338
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.024 msecs