INFO: task jfsCommit:277 blocked for more than 143 seconds. Not tainted 5.15.177-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:jfsCommit state:D stack:26360 pid: 277 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 io_schedule+0x88/0x100 kernel/sched/core.c:8481 __lock_metapage+0x1ec/0x3c0 fs/jfs/jfs_metapage.c:49 lock_metapage fs/jfs/jfs_metapage.c:63 [inline] __get_metapage+0x495/0x1070 fs/jfs/jfs_metapage.c:640 dbUpdatePMap+0x365/0xf50 fs/jfs/jfs_dmap.c:490 txAllocPMap+0x57b/0x6b0 fs/jfs/jfs_txnmgr.c:2459 txUpdateMap+0x7c8/0x9e0 fs/jfs/jfs_txnmgr.c:2397 txLazyCommit fs/jfs/jfs_txnmgr.c:2698 [inline] jfs_lazycommit+0x470/0xc30 fs/jfs/jfs_txnmgr.c:2766 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 5 locks held by kworker/u4:2/145: #0: ffff8880175cd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc900016ffd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 #2: ffffffff8dc36a90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xc90 net/core/net_namespace.c:572 #3: ffff88801eca53e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x10c/0x2f0 drivers/net/wireguard/device.c:233 #4: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #4: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:845 2 locks held by getty/3934: #0: ffff88814ceac098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026362e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 3 locks held by kworker/u4:14/5221: 2 locks held by kworker/0:13/5496: #0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc900039bfd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 3 locks held by syz-executor/11221: #0: ffff888021088ff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x63/0x1070 net/bluetooth/hci_core.c:1737 #1: ffff888021088078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x431/0x1070 net/bluetooth/hci_core.c:1782 #2: ffffffff8dd8cf48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1517 [inline] #2: ffffffff8dd8cf48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xb8/0x220 net/bluetooth/hci_conn.c:1622 3 locks held by syz.6.1298/11256: #0: ffff888061db8ff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x63/0x1070 net/bluetooth/hci_core.c:1737 #1: ffff888061db8078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x431/0x1070 net/bluetooth/hci_core.c:1782 #2: ffffffff8dd8cf48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1517 [inline] #2: ffffffff8dd8cf48 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xb8/0x220 net/bluetooth/hci_conn.c:1622 1 lock held by rm/11287: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5497 Comm: kworker/0:14 Not tainted 5.15.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: 0x0 (events) RIP: 0010:load_balance+0x50b1/0x77a0 kernel/sched/fair.c:10241 Code: 80 c1 03 38 c1 0f 8c 70 fd ff ff 4c 89 f7 e8 86 ef 6c 00 e9 63 fd ff ff c7 84 24 20 01 00 00 00 00 00 00 48 8b 7c 24 38 eb 57 <48> 8b 7c 24 38 eb 4b 41 83 c6 20 48 bb 00 00 00 00 00 fc ff df 48 RSP: 0018:ffffc9000391f3c0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff88802849da30 RCX: 1ffff92000723f29 RDX: ffffc9000391f978 RSI: ffffc9000391f978 RDI: ffff88802849da28 RBP: ffffc9000391fa10 R08: dffffc0000000000 R09: ffffed1005093b29 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000391f978 R13: ffffc9000391f938 R14: ffff8880b8f3ae20 R15: ffffc9000391f978 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055923271a131 CR3: 000000002af2a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: newidle_balance+0x4d8/0xed0 kernel/sched/fair.c:11220 pick_next_task_fair+0x27d/0x9c0 kernel/sched/fair.c:7617 __pick_next_task kernel/sched/core.c:5647 [inline] pick_next_task kernel/sched/core.c:5755 [inline] __schedule+0x86d/0x45b0 kernel/sched/core.c:6337 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 worker_thread+0xf56/0x1280 kernel/workqueue.c:2478 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287