INFO: task syz.0.13:5402 blocked for more than 146 seconds. Not tainted 6.11.0-syzkaller-10669-g11a299a7933e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.13 state:D stack:24032 pid:5402 tgid:5374 ppid:5232 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 io_schedule+0x8d/0x110 kernel/sched/core.c:7552 folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1309 folio_wait_writeback+0xe7/0x1e0 mm/page-writeback.c:3189 truncate_inode_pages_range+0xafd/0xfc0 mm/truncate.c:398 bchfs_fallocate+0x2d1/0x730 fs/bcachefs/fs-io.c:718 bch2_fallocate_dispatch+0x3ac/0x540 fs/bcachefs/fs-io.c:771 vfs_fallocate+0x569/0x6e0 fs/open.c:333 do_vfs_ioctl+0x2583/0x2e40 fs/ioctl.c:886 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893 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: 0033:0x7f89b1f7df39 RSP: 002b:00007f89b19ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f89b2136130 RCX: 00007f89b1f7df39 RDX: 0000000020000180 RSI: 0000000040305839 RDI: 0000000000000009 RBP: 00007f89b1ff0216 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f89b2136130 R15: 00007ffee951f698 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: 1 lock held by khungtaskd/30: #0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701 3 locks held by kworker/u8:3/53: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90000be7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000be7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 2 locks held by kworker/u8:9/2580: 2 locks held by getty/4976: #0: ffff88814c35f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/5209: 3 locks held by kworker/u9:5/5230: #0: ffff888055e29148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff888055e29148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90003cd7d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003cd7d00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff888032d7cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:410 [inline] #2: ffff888032d7cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0x1bf/0x6b0 net/bluetooth/hci_core.c:941 2 locks held by syz-executor/5238: #0: ffff88807a4640e0 (&type->s_umount_key#65){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88807a4640e0 (&type->s_umount_key#65){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88807a4640e0 (&type->s_umount_key#65){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505 #1: ffff888056d80278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0xfd/0x540 fs/bcachefs/super.c:618 2 locks held by kworker/1:5/5272: #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9000422fd00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000422fd00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 1 lock held by syz.0.13/5375: #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679 1 lock held by syz.0.13/5401: #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: vfs_writev+0x2d1/0xba0 fs/read_write.c:1062 2 locks held by syz.0.13/5402: #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline] #0: ffff8880570b2420 (sb_writers#18){.+.+}-{0:0}, at: vfs_fallocate+0x4fe/0x6e0 fs/open.c:332 #1: ffff88805aa508c0 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff88805aa508c0 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: bch2_fallocate_dispatch+0x1e2/0x540 fs/bcachefs/fs-io.c:762 2 locks held by bch-copygc/loop/5397: 3 locks held by bch-reclaim/loo/5434: 1 lock held by syz-executor/5587: 1 lock held by syz-executor/5858: 2 locks held by syz.3.118/6132: #0: ffff8880570b20e0 (&type->s_umount_key#65){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880570b20e0 (&type->s_umount_key#65){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff8880570b2938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline] #1: ffff8880570b2938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802 2 locks held by syz.4.121/6152: #0: ffff8880570b20e0 (&type->s_umount_key#65){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880570b20e0 (&type->s_umount_key#65){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff8880570b2938 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2619 [inline] #1: ffff8880570b2938 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x32e/0xb50 fs/fs-writeback.c:2802 1 lock held by syz.0.124/6170: #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 1 lock held by syz-executor/6198: #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink net/core/rtnetlink.c:3720 [inline] #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xab7/0x20a0 net/core/rtnetlink.c:3743 2 locks held by syz-executor/6201: #0: ffffffff8fcb2910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159 1 lock held by syz-executor/6213: #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 4 locks held by rm/6222: 1 lock held by syz-executor/6223: #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcbf408 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-10669-g11a299a7933e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5434 Comm: bch-reclaim/loo Not tainted 6.11.0-syzkaller-10669-g11a299a7933e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:lock_is_held_type+0xd3/0x190 kernel/locking/lockdep.c:5894 Code: 85 c0 75 2a 48 ff c5 49 63 85 d8 0a 00 00 48 83 c3 28 48 39 c5 7c d8 eb 11 48 c7 c7 60 49 80 8e 48 89 ee e8 7f e0 2f f9 eb cb <31> db eb 1e 41 83 fe ff 74 13 31 c0 f6 43 22 03 0f 95 c0 31 db 44 RSP: 0018:ffffc9000454f258 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff88802aa6a958 RCX: ffff88802aa69e00 RDX: 0000000000000000 RSI: ffffffff8e937f40 RDI: ffff88802aa6a930 RBP: 0000000000000003 R08: ffffc9000454f487 R09: 0000000000000000 R10: ffffc9000454f460 R11: fffff520008a9e91 R12: 0000000000000246 R13: ffff88802aa69e00 R14: 00000000ffffffff R15: ffffffff8e937f40 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9a91cd0000 CR3: 000000000e734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:249 [inline] __might_resched+0xa5/0x780 kernel/sched/core.c:8593 __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0xc1/0xd70 kernel/locking/mutex.c:752 bch2_btree_write_buffer_flush_locked+0x170/0x59f0 fs/bcachefs/btree_write_buffer.c:283 btree_write_buffer_flush_seq+0x1a43/0x1bc0 fs/bcachefs/btree_write_buffer.c:510 bch2_btree_write_buffer_journal_flush+0x4e/0x80 fs/bcachefs/btree_write_buffer.c:525 journal_flush_pins+0x5f7/0xb20 fs/bcachefs/journal_reclaim.c:565 __bch2_journal_reclaim+0x789/0xdc0 fs/bcachefs/journal_reclaim.c:698 bch2_journal_reclaim_thread+0x174/0x560 fs/bcachefs/journal_reclaim.c:740 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