INFO: task kworker/u5:1:14134 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u5:1 state:D stack:27560 pid:14134 ppid: 2 flags:0x00004000 Workqueue: hci6 hci_power_on Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 hci_dev_do_open+0x2a/0x70 net/bluetooth/hci_core.c:480 hci_power_on+0x133/0x630 net/bluetooth/hci_core.c:963 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INFO: task syz-executor.4:18556 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28760 pid:18556 ppid: 14596 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x378/0x530 kernel/sched/completion.c:106 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162 hci_dev_close_sync+0x8d/0x1150 net/bluetooth/hci_sync.c:4091 hci_dev_do_close+0x32/0x70 net/bluetooth/hci_core.c:553 hci_unregister_dev+0x1c4/0x550 net/bluetooth/hci_core.c:2685 hci_uart_tty_close+0x241/0x2a0 drivers/bluetooth/hci_ldisc.c:548 tty_ldisc_close+0x110/0x190 drivers/tty/tty_ldisc.c:456 tty_set_ldisc+0x214/0x680 drivers/tty/tty_ldisc.c:552 tiocsetd drivers/tty/tty_io.c:2433 [inline] tty_ioctl+0xae0/0x15e0 drivers/tty/tty_io.c:2714 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f9f9c489109 RSP: 002b:00007f9f9d6b6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9f9c59c030 RCX: 00007f9f9c489109 RDX: 0000000020000140 RSI: 0000000000005423 RDI: 0000000000000003 RBP: 00007f9f9c4e305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa239e03f R14: 00007f9f9d6b6300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 2 locks held by getty/3290: #0: ffff88814aaca098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90001c382e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124 3 locks held by kworker/u5:1/14134: #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff88801c0f6138 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000455fda8 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88807d921048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0x2a/0x70 net/bluetooth/hci_core.c:480 3 locks held by syz-executor.4/18556: #0: ffff888076cb31c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_lock+0xbd/0x120 drivers/tty/tty_mutex.c:20 #1: ffff888076cb3098 (&tty->ldisc_sem){++++}-{0:0}, at: __tty_ldisc_lock drivers/tty/tty_ldisc.c:290 [inline] #1: ffff888076cb3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_lock+0x61/0xb0 drivers/tty/tty_ldisc.c:314 #2: ffff88807d921048 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 41 Comm: kworker/u4:2 Not tainted 5.19.0-rc4-syzkaller-00208-g69cb6c6556ad #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x22e/0x5660 kernel/locking/lockdep.c:4987 Code: 81 e6 ff 1f 00 00 3b 74 24 10 75 0c 48 83 7c 24 20 00 0f 85 df 0c 00 00 4c 03 64 24 28 0f b7 4c 24 10 49 8d 44 24 20 48 89 c2 <48> 89 44 24 38 66 81 e1 ff 1f 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc90000d2f9b8 EFLAGS: 00000086 RAX: ffff888012984b50 RBX: ffff88807cd94318 RCX: 0000000000000745 RDX: ffff888012984b50 RSI: 0000000000000743 RDI: ffff888012984b28 RBP: 0000000000000000 R08: 1ffff11002530965 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888012984b30 R13: ffff888012984080 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f02bb86f990 CR3: 000000000ba8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:442 batadv_nc_worker+0x930/0xfa0 net/batman-adv/network-coding.c:722 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 ---------------- Code disassembly (best guess): 0: 81 e6 ff 1f 00 00 and $0x1fff,%esi 6: 3b 74 24 10 cmp 0x10(%rsp),%esi a: 75 0c jne 0x18 c: 48 83 7c 24 20 00 cmpq $0x0,0x20(%rsp) 12: 0f 85 df 0c 00 00 jne 0xcf7 18: 4c 03 64 24 28 add 0x28(%rsp),%r12 1d: 0f b7 4c 24 10 movzwl 0x10(%rsp),%ecx 22: 49 8d 44 24 20 lea 0x20(%r12),%rax 27: 48 89 c2 mov %rax,%rdx * 2a: 48 89 44 24 38 mov %rax,0x38(%rsp) <-- trapping instruction 2f: 66 81 e1 ff 1f and $0x1fff,%cx 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: c1 .byte 0xc1