INFO: task kworker/u9:1:5154 blocked for more than 143 seconds. Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u9:1 state:D stack:25496 pid:5154 tgid:5154 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: hci1 hci_rx_work Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 hci_event_func net/bluetooth/hci_event.c:7511 [inline] hci_event_packet+0x7e0/0x1200 net/bluetooth/hci_event.c:7565 hci_rx_work+0x46a/0xe80 net/bluetooth/hci_core.c:4044 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz-executor:6673 blocked for more than 144 seconds. Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21960 pid:6673 tgid:6673 ppid:1 task_flags:0x40054c flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:148 __flush_work+0x9b9/0xbc0 kernel/workqueue.c:4246 __cancel_work_sync+0xbe/0x110 kernel/workqueue.c:4366 hidp_session_remove+0x62/0x260 net/bluetooth/hidp/core.c:1169 l2cap_unregister_all_users net/bluetooth/l2cap_core.c:1748 [inline] l2cap_conn_del+0x23a/0x680 net/bluetooth/l2cap_core.c:1777 hci_disconn_cfm include/net/bluetooth/hci_core.h:2069 [inline] hci_conn_hash_flush+0x10d/0x230 net/bluetooth/hci_conn.c:2560 hci_dev_close_sync+0xaef/0x1330 net/bluetooth/hci_sync.c:5250 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline] hci_unregister_dev+0x206/0x500 net/bluetooth/hci_core.c:2691 vhci_release+0x80/0xd0 drivers/bluetooth/hci_vhci.c:665 __fput+0x44c/0xa70 fs/file_table.c:465 task_work_run+0x1d1/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x6ad/0x22e0 kernel/exit.c:955 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3bb138d37c RSP: 002b:00007fff35f17cb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007f3bb138d37c RDX: 0000000000000030 RSI: 00007fff35f17d70 RDI: 00000000000000f9 RBP: 00007fff35f17d1c R08: 0000000000000000 R09: 0079746972756365 R10: 00007fff35f17670 R11: 0000000000000246 R12: 0000000000000258 R13: 00000000000927c0 R14: 00000000000250f2 R15: 00007fff35f17d70 INFO: task khidpd_16c05505:6755 blocked for more than 145 seconds. Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khidpd_16c05505 state:D stack:29416 pid:6755 tgid:6755 ppid:2 task_flags:0x208040 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 l2cap_unregister_user+0x6a/0x1b0 net/bluetooth/l2cap_core.c:1728 hidp_session_thread+0x3c9/0x410 net/bluetooth/hidp/core.c:1304 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz.0.616:8084 blocked for more than 145 seconds. Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.616 state:D stack:28328 pid:8084 tgid:8083 ppid:8063 task_flags:0x400140 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6935 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 l2cap_sock_connect+0x5c5/0x7a0 net/bluetooth/l2cap_sock.c:256 __sys_connect_file net/socket.c:2038 [inline] __sys_connect+0x313/0x440 net/socket.c:2057 __do_sys_connect net/socket.c:2063 [inline] __se_sys_connect net/socket.c:2060 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2060 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9eb458e969 RSP: 002b:00007f9eb537e038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f9eb47b5fa0 RCX: 00007f9eb458e969 RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000005 RBP: 00007f9eb4610ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9eb47b5fa0 R15: 00007fff3471c5d8 Showing all locks held in the system: 4 locks held by kworker/u8:0/12: #0: ffff88801a489148 ( (wq_completion)events_unbound ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc90000117bc0 ( (linkwatch_work).work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffffffff8f50fa88 ( rtnl_mutex ){+.+.}-{4:4} , at: linkwatch_event+0xe/0x60 net/core/link_watch.c:303 #3: ffffffff8e1448b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline] #3: ffffffff8e1448b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998 1 lock held by khungtaskd/31: #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3} , at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] , at: rcu_read_lock include/linux/rcupdate.h:841 [inline] , at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 4 locks held by kworker/u9:0/51: #0: ffff888058efb948 ( (wq_completion)hci5 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc90000bc7bc0 ( (work_completion)(&hdev->rx_work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff88805de58078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 ( hci_cb_list_lock ){+.+.}-{4:4} , at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] , at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 8 locks held by kworker/1:2/3611: 4 locks held by kworker/u9:1/5154: #0: ffff888023c6e948 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff888023c6e948 ((wq_completion)hci1#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000fb9fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc9000fb9fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff88802460c078 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 2 locks held by getty/5600: #0: ffff888033cf00a0 ( &tty->ldisc_sem ){++++}-{0:0} , at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 4 locks held by kworker/u9:2/5916: #0: ffff888078583148 ( (wq_completion)hci3 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000445fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] ffffc9000445fbc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff888024b40078 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 5 locks held by syz-executor/6673: #0: ffff8880323ecd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff8880323ecd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x1fe/0x500 net/bluetooth/hci_core.c:2691 #1: ffff8880323ec078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330 net/bluetooth/hci_sync.c:5238 #2: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2066 [inline] #2: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x230 net/bluetooth/hci_conn.c:2560 #3: ffff8880116a4b38 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x70/0x680 net/bluetooth/l2cap_core.c:1762 #4: ffffffff8f6a0d90 (hidp_session_sem){++++}-{4:4}, at: hidp_session_remove+0x2c/0x260 net/bluetooth/hidp/core.c:1165 1 lock held by khidpd_16c05505/6755: #0: ffff8880323ec078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_unregister_user+0x6a/0x1b0 net/bluetooth/l2cap_core.c:1728 1 lock held by syz.0.616/8084: #0: ffff88802460c078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 4 locks held by kworker/u9:3/8090: #0: ffff888078991148 ( (wq_completion)hci2 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc900040bfbc0 ( (work_completion)(&hdev->rx_work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff88806a8ec078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 ( hci_cb_list_lock ){+.+.}-{4:4} , at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] , at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 1 lock held by syz.1.617/8113: #0: ffff88806a8ec078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 4 locks held by kworker/u9:4/8118: #0: ffff8880330b6148 ( (wq_completion)hci4 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc90003c0fbc0 ( (work_completion)(&hdev->rx_work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff88803023c078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 1 lock held by syz.2.618/8138: #0: ffff888024b40078 (&hdev->lock){+.+.}-{4:4}, at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 1 lock held by syz.3.619/8163: #0: ffff88803023c078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 4 locks held by kworker/u9:6/8167: #0: ffff88806899f148 ( (wq_completion)hci6 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000b667bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc9000b667bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff88803271c078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 ( hci_cb_list_lock ){+.+.}-{4:4} , at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] , at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 1 lock held by syz.4.620/8193: #0: ffff88805de58078 (&hdev->lock){+.+.}-{4:4}, at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 4 locks held by kworker/u9:7/8204: #0: ffff88805fcf4148 ( (wq_completion)hci8 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000b767bc0 ( (work_completion)(&hdev->rx_work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff888033b10078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 ( hci_cb_list_lock ){+.+.}-{4:4} , at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] , at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 1 lock held by syz.5.621/8229: #0: ffff88803271c078 (&hdev->lock){+.+.}-{4:4}, at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 4 locks held by kworker/u9:8/8234: #0: ffff888055c75148 ( (wq_completion)hci7 #2 ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3213 [inline] , at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000b847bc0 ( (work_completion)(&hdev->rx_work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3214 [inline] , at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff8880292c4078 ( &hdev->lock ){+.+.}-{4:4} , at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 ( hci_cb_list_lock ){+.+.}-{4:4} , at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] , at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 1 lock held by syz.6.622/8260: #0: ffff8880292c4078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 1 lock held by syz.7.623/8289: #0: ffff888033b10078 ( &hdev->lock ){+.+.}-{4:4} , at: l2cap_chan_connect+0x102/0xe30 net/bluetooth/l2cap_core.c:6957 1 lock held by syz-executor/8294: #0: ffffffff8f50fa88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4054 4 locks held by kworker/u9:10/8295: #0: ffff88805ba3e948 ((wq_completion)hci9#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline] #0: ffff88805ba3e948 ((wq_completion)hci9#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3321 #1: ffffc9000bdb7bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline] #1: ffffc9000bdb7bc0 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3321 #2: ffff888068698078 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x8e0 net/bluetooth/hci_event.c:3713 #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline] #3: ffffffff8f677d68 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x516/0x8e0 net/bluetooth/hci_event.c:3747 2 locks held by dhcpcd/8307: #0: ffff888028aa2258 ( sk_lock-AF_PACKET ){+.+.}-{0:0} , at: lock_sock include/net/sock.h:1667 [inline] , at: packet_do_bind+0x32/0xcd0 net/packet/af_packet.c:3252 #1: ffffffff8e1448b8 ( rcu_state.exp_mutex ){+.+.}-{4:4} , at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline] , at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:470 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 3611 Comm: kworker/1:2 Not tainted 6.16.0-rc1-syzkaller-g8909f5f4ecd5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events hidp_session_dev_work RIP: 0010:unwind_next_frame+0x395/0x2390 arch/x86/kernel/unwind_orc.c:505 Code: e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 80 19 00 00 41 0f b6 44 24 01 <83> e0 07 0f 84 75 15 00 00 83 f8 01 4c 8b 7c 24 48 48 bd 00 00 00 RSP: 0018:ffffc90000a08658 EFLAGS: 00000046 RAX: 0000000000000002 RBX: ffffffff8fb7cad4 RCX: ffffffff8fb7cad8 RDX: ffffffff9034b1e0 RSI: ffffffff9034b19e RDI: ffffffff8be282a0 RBP: dffffc0000000000 R08: 000000000000000c R09: ffffffff81729de5 R10: ffffc90000a08778 R11: ffffffff81acf990 R12: ffffffff9034b1e4 R13: ffffffff9034b1e5 R14: ffffc90000a08728 R15: ffffffff8fb7cad4 FS: 0000000000000000(0000) GS:ffff888125d52000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ee6da72660 CR3: 00000000299d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 insert_work+0x3d/0x330 kernel/workqueue.c:2183 __queue_work+0xbd9/0xfe0 kernel/workqueue.c:2345 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1793 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x646/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 71 61 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 60 61 1f 00 eb 06 e8 59 61 1f 00 fb 48 c7 c7 20 30 13 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 36 RSP: 0018:ffffc9000cb17060 EFLAGS: 00000293 RAX: ffffffff81a0fd97 RBX: ffffffff81a0fc54 RCX: ffff888031923c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e133020 RBP: ffffc9000cb17170 R08: ffffffff8fa107f7 R09: 1ffffffff1f420fe