INFO: task syz.2.361:8245 blocked for more than 143 seconds.
      Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.361       state:D stack:12248 pid:8245  tgid:8244  ppid:7228   flags:0x00004004
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
 io_schedule+0x8d/0x110 kernel/sched/core.c:7401
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1307
 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3162
 __filemap_fdatawait_range+0x181/0x410 mm/filemap.c:532
 filemap_write_and_wait_range+0x1e9/0x290 mm/filemap.c:694
 bch2_write_invalidate_inode_pages_range+0x82/0x120 fs/bcachefs/fs-io-pagecache.c:61
 bch2_direct_write+0x2d95/0x3050 fs/bcachefs/fs-io-direct.c:647
 bch2_write_iter+0x206/0x2840 fs/bcachefs/fs-io-buffered.c:1135
 iter_file_splice_write+0xbd7/0x14e0 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x11e/0x220 fs/splice.c:1164
 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x28c/0x3e0 fs/splice.c:1233
 do_sendfile+0x56d/0xe20 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348
 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: 0033:0x7f48c9375b59
RSP: 002b:00007f48ca0d4048 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f48c9503f60 RCX: 00007f48c9375b59
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000008
RBP: 00007f48c93e4e5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f48c9503f60 R15: 00007ffd92c14f98
 </TASK>
INFO: task syz.2.361:8278 blocked for more than 144 seconds.
      Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.361       state:D stack:17328 pid:8278  tgid:8244  ppid:7228   flags:0x00004004
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
 io_schedule+0x8d/0x110 kernel/sched/core.c:7401
 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1307
 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3162
 __filemap_fdatawait_range+0x181/0x410 mm/filemap.c:532
 file_write_and_wait_range+0x1fa/0x290 mm/filemap.c:792
 bch2_fsync+0x93/0x130 fs/bcachefs/fs-io.c:197
 generic_write_sync include/linux/fs.h:2816 [inline]
 bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline]
 bch2_write_iter+0x262e/0x2840 fs/bcachefs/fs-io-buffered.c:1136
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 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: 0033:0x7f48c9375b59
RSP: 002b:00007f48ca092048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f48c9504110 RCX: 00007f48c9375b59
RDX: 0000000000000011 RSI: 00000000200002c0 RDI: 0000000000000004
RBP: 00007f48c93e4e5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f48c9504110 R15: 00007ffd92c14f98
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 #0: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline]
 #0: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
3 locks held by kworker/1:1/46:
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc90000b67d00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc90000b67d00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8e33b3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:296 [inline]
 #2: ffffffff8e33b3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:958
3 locks held by kworker/u8:3/52:
3 locks held by kworker/0:2/783:
2 locks held by getty/4840:
 #0: ffff88802f8e00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:6/5144:
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
 #1: ffffc900035afd00 ((work_completion)(&(&devlink->rwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
 #1: ffffc900035afd00 ((work_completion)(&(&devlink->rwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
 #2: ffffffff8e33b3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
 #2: ffffffff8e33b3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
1 lock held by syz.2.361/8245:
 #0: ffff88802bf38420 (sb_writers#17){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163
9 locks held by syz.2.361/8277:
2 locks held by syz.2.361/8278:
 #0: ffff88802dd300c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x310 fs/file.c:1191
 #1: ffff88802bf38420 (sb_writers#17){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
 #1: ffff88802bf38420 (sb_writers#17){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
2 locks held by syz.4.376/8549:
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2612 [inline]
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb20 fs/fs-writeback.c:2795
2 locks held by syz.0.424/8847:
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2612 [inline]
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb20 fs/fs-writeback.c:2795
3 locks held by syz-executor/9184:
 #0: ffff888069dd0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:488 [inline]
 #0: ffff888069dd0d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2699
 #1: ffff888069dd0078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5110
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
2 locks held by syz.0.524/9569:
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2612 [inline]
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb20 fs/fs-writeback.c:2795
3 locks held by syz-executor/9639:
 #0: ffff8880518e8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:488 [inline]
 #0: ffff8880518e8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2699
 #1: ffff8880518e8078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5110
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
3 locks held by syz-executor/9694:
 #0: ffff88802280cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:488 [inline]
 #0: ffff88802280cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2699
 #1: ffff88802280c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5110
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
2 locks held by syz.4.564/9734:
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802bf380e0 (&type->s_umount_key#68){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2612 [inline]
 #1: ffff88802bf38938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x335/0xb20 fs/fs-writeback.c:2795
3 locks held by syz-executor/9839:
 #0: ffff88802f04cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:488 [inline]
 #0: ffff88802f04cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2699
 #1: ffff88802f04c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5110
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592
3 locks held by syz.1.587/9972:
 #0: ffff888069860d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:488 [inline]
 #0: ffff888069860d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2699
 #1: ffff888069860078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5110
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline]
 #2: ffffffff8f74e568 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592

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

NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 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+0xfde/0x1020 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 PID: 8277 Comm: syz.2.361 Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__asan_memset+0x0/0x50 mm/kasan/shadow.c:83
Code: 48 8b 0c 24 ba 01 00 00 00 e9 3c e6 ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 56 53 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18
RSP: 0018:ffffc90004c2ce58 EFLAGS: 00000246
RAX: ffffffff840ebc5e RBX: ffffc90004c2cf70 RCX: 0000000000040000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc90004c2cf20
RBP: ffffc90004c2d160 R08: ffffffff840e9f94 R09: 0000000000000000
R10: ffffc90004c2cfc0 R11: fffff520009859fd R12: 0000000000000002
R13: ffffc90004c2cf20 R14: ffff888079f0c340 R15: dffffc0000000000
FS:  00007f48ca0b36c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3797504000 CR3: 00000000684ba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 bch2_btree_path_verify_level+0xed/0x1950 fs/bcachefs/btree_iter.c:145
 bch2_btree_path_verify+0xb0/0x300 fs/bcachefs/btree_iter.c:232
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2171 [inline]
 bch2_btree_iter_peek_upto+0x8a2/0x7090 fs/bcachefs/btree_iter.c:2280
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:641 [inline]
 bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:491 [inline]
 bch2_bucket_alloc_trans+0x111d/0x3b30 fs/bcachefs/alloc_foreground.c:649
 bch2_bucket_alloc_set_trans+0x4f9/0xcf0 fs/bcachefs/alloc_foreground.c:810
 __open_bucket_add_buckets+0x11ed/0x1c80 fs/bcachefs/alloc_foreground.c:1058
 open_bucket_add_buckets+0x174/0x230 fs/bcachefs/alloc_foreground.c:1102
 bch2_alloc_sectors_start_trans+0xcaf/0x1f60
 __bch2_write+0x75b/0x5c40 fs/bcachefs/io_write.c:1438
 bch2_write+0x947/0x1670 fs/bcachefs/io_write.c:1634
 closure_queue include/linux/closure.h:270 [inline]
 closure_call include/linux/closure.h:432 [inline]
 bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:460 [inline]
 bch2_writepages+0x27d/0x380 fs/bcachefs/fs-io-buffered.c:652
 do_writepages+0x359/0x870 mm/page-writeback.c:2656
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788
 bch2_fsync+0x93/0x130 fs/bcachefs/fs-io.c:197
 generic_write_sync include/linux/fs.h:2816 [inline]
 bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline]
 bch2_write_iter+0x262e/0x2840 fs/bcachefs/fs-io-buffered.c:1136
 iter_file_splice_write+0xbd7/0x14e0 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x11e/0x220 fs/splice.c:1164
 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x28c/0x3e0 fs/splice.c:1233
 vfs_copy_file_range+0xd37/0x1530 fs/read_write.c:1558
 __do_sys_copy_file_range fs/read_write.c:1612 [inline]
 __se_sys_copy_file_range+0x3f2/0x5d0 fs/read_write.c:1575
 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: 0033:0x7f48c9375b59
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48ca0b3048 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f48c9504038 RCX: 00007f48c9375b59
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f48c93e4e5d R08: ffffffffa003e459 R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f48c9504038 R15: 00007ffd92c14f98
 </TASK>