INFO: task syz-executor:2683 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:24424 pid:2683 tgid:2683 ppid:5610 task_flags:0x400100 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_timeout+0xc0/0x2c0 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion+0x2ca/0x5e0 kernel/sched/completion.c:153 __flush_workqueue+0x709/0x1470 kernel/workqueue.c:4130 hci_dev_open+0x145/0x360 net/bluetooth/hci_core.c:472 sock_do_ioctl+0x101/0x320 net/socket.c:1300 sock_ioctl+0x57a/0x7e0 net/socket.c:1421 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe6bb9daeb RSP: 002b:00007ffc084c1020 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbe6bb9daeb RDX: 0000000000000007 RSI: 00000000400448c9 RDI: 0000000000000003 RBP: 00007ffc084c108c R08: 00007fbe6a5f76c0 R09: 00007ffc084c0f97 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000007 R13: 0000000000000007 R14: 00007ffc084c1348 R15: 0000000000000000 Showing all locks held in the system: 4 locks held by kworker/u8:1/13: #0: ffff8880526bf940 ((wq_completion)wg-kex-wg1#55){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff8880526bf940 ((wq_completion)wg-kex-wg1#55){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc90000127c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc90000127c40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffff888052bed440 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x12e/0x810 drivers/net/wireguard/noise.c:529 #3: ffff88804521dc58 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x13f/0x810 drivers/net/wireguard/noise.c:530 1 lock held by kworker/R-mm_pe/14: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 4 locks held by kworker/1:0/24: 1 lock held by khungtaskd/30: #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 2 locks held by kworker/1:1/42: 2 locks held by kworker/1:2/809: 1 lock held by kworker/R-krxrp/3213: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 2 locks held by getty/5383: #0: ffff888032aee0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211 1 lock held by kworker/0:4/5689: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 2 locks held by kworker/1:3/12087: 1 lock held by kworker/R-wg-cr/18968: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/18969: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/18971: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 2 locks held by kworker/1:6/20443: 1 lock held by kworker/u9:1/22552: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 8 locks held by kworker/1:7/23602: 4 locks held by kworker/0:8/23666: #0: ffff88807f415140 ((wq_completion)wg-kex-wg2#64){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88807f415140 ((wq_completion)wg-kex-wg2#64){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc90005837c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc90005837c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffff888052dd1440 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x1a2/0x9b0 drivers/net/wireguard/noise.c:598 #3: ffff8880737cbea0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x59c/0x9b0 drivers/net/wireguard/noise.c:632 2 locks held by kworker/1:8/24404: 2 locks held by kworker/1:11/24804: 1 lock held by kworker/R-wg-cr/25423: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/25424: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/25425: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/25710: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/25711: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/28648: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/28649: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/28650: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 3 locks held by kworker/u9:0/29217: #0: ffff88806188f940 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88806188f940 ((wq_completion)hci7){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc9000d04fc40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc9000d04fc40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffff88803f39cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:426 [inline] #2: ffff88803f39cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1a2/0x750 net/bluetooth/hci_core.c:920 1 lock held by kworker/R-wg-cr/29410: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29411: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29412: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29490: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29492: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/29493: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29623: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/29624: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/29625: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 3 locks held by kworker/u9:2/29637: #0: ffff888034329140 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff888034329140 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc900052e7c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc900052e7c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffff88803f26cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:426 [inline] #2: ffff88803f26cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1a2/0x750 net/bluetooth/hci_core.c:920 2 locks held by kworker/1:4/31913: 1 lock held by kworker/R-wg-cr/32523: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/32524: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/32605: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/32606: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/32607: 1 lock held by kworker/R-wg-cr/431: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/432: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 1 lock held by kworker/R-wg-cr/433: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/911: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/912: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/914: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/2085: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/2086: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/2087: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-bond0/2204: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3411 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xfdb/0x10b0 kernel/workqueue.c:3672 1 lock held by kworker/R-wg-cr/2216: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/2217: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2795 [inline] #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xbda/0x10b0 kernel/workqueue.c:3657 1 lock held by kworker/R-wg-cr/2218: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 3 locks held by kworker/u8:21/2287: #0: ffff88801c296140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88801c296140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc900056f7c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc900056f7c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffffffff9001d2a8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810 net/core/net_namespace.c:673 1 lock held by syz-executor/2678: #0: ffff88808ba48ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:426 [inline] #0: ffff88808ba48ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_open+0x1f3/0x360 net/bluetooth/hci_core.c:484 1 lock held by syz-executor/2682: #0: ffff88808ac74ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:426 [inline] #0: ffff88808ac74ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_open+0x1f3/0x360 net/bluetooth/hci_core.c:484 2 locks held by kworker/1:5/2684: 3 locks held by kworker/u9:3/2695: #0: ffff888025ffe140 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff888025ffe140 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc90004da7c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc90004da7c40 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffff88807f120ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_open net/bluetooth/hci_core.c:426 [inline] #2: ffff88807f120ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_power_on+0x1a2/0x750 net/bluetooth/hci_core.c:920 1 lock held by kworker/1:9/2750: #0: ffffffff8e9f6ea0 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2737 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122 nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd7/0x1030 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 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: 23602 Comm: kworker/1:7 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Workqueue: events free_obj_work RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline] RIP: 0010:lock_acquire+0x116/0x350 kernel/locking/lockdep.c:5870 Code: 8b 54 24 04 44 89 e1 45 89 f0 6a 00 6a 00 6a 00 55 ff 74 24 30 e8 da 02 00 00 48 83 c4 28 48 c7 c7 f3 ec 4a 8e e8 aa 9e 2c 0a ff ff ff ff 65 0f c1 05 6d 90 ca 11 83 f8 01 0f 85 ae 00 00 00 RSP: 0018:ffffc90000a07ea0 EFLAGS: 00000006 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000100 RDX: 00000000a42637f2 RSI: ffffffff8e4aecf3 RDI: ffffffff8c4bd380 RBP: ffffffff8176f21f R08: ffffffff8176f21f R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002 R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246 FS: 0000000000000000(0000) GS:ffff888125059000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f75d4e27dac CR3: 000000000e946000 CR4: 00000000003526f0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] rcu_read_lock include/linux/rcupdate.h:840 [inline] class_rcu_constructor include/linux/rcupdate.h:1183 [inline] unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kmem_cache_free+0x182/0x650 mm/slub.c:6532 nft_synproxy_eval_v4+0x36a/0x4e0 net/netfilter/nft_synproxy.c:-1 nft_synproxy_do_eval+0x335/0x550 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] nft_do_chain+0x48d/0x1b10 net/netfilter/nf_tables_core.c:285 nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:273 [inline] NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:316 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6206 [inline] __netif_receive_skb net/core/dev.c:6319 [inline] process_backlog+0xa34/0x1860 net/core/dev.c:6670 __napi_poll+0xaa/0x330 net/core/dev.c:7729 napi_poll net/core/dev.c:7792 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:7949 handle_softirqs+0x225/0x840 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:81 [inline] RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:103 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:238 [inline] RIP: 0010:unwind_next_frame+0x4f8/0x2550 arch/x86/kernel/unwind_orc.c:510 Code: f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 47 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 <48> 63 03 48 01 d8 48 8d 4b 04 48 39 e8 4c 0f 46 f9 48 8d 43 fc 4c RSP: 0018:ffffc900033af580 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff907a2a04 RCX: dffffc0000000000 RDX: ffffffff907a29f4 RSI: ffffffff90fcb258 RDI: ffffffff8c4bd320 RBP: ffffffff8233f55f R08: 0000000000000009 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8eb59c60 R12: ffffffff907a2a14 R13: ffffffff907a29f4 R14: ffffc900033af628 R15: ffffffff907a29f4 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2705 [inline] slab_free mm/slub.c:6405 [inline] kmem_cache_free+0x182/0x650 mm/slub.c:6532 free_object_list lib/debugobjects.c:326 [inline] free_obj_work+0x357/0x490 lib/debugobjects.c:530 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245