------------[ cut here ]------------ WARNING: CPU: 0 PID: 9706 at kernel/workqueue.c:1438 __queue_work+0xe36/0x1200 kernel/workqueue.c:1438 Modules linked in: CPU: 0 PID: 9706 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-02770-g79d878f7ad8e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:__queue_work+0xe36/0x1200 kernel/workqueue.c:1438 Code: e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 22 77 7a 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 73 66 2d 00 85 db 75 42 e8 aa 69 2d 00 <0f> 0b e9 4a f8 ff ff e8 9e 69 2d 00 0f 0b e9 dc f7 ff ff e8 92 69 RSP: 0018:ffffc90000007cb8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000100 RCX: 0000000000000100 RDX: ffff88804ba43b00 RSI: ffffffff814dabc6 RDI: 0000000000000005 RBP: ffffc90000007d70 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000001 R12: ffff88804d8ecb30 R13: 1ffff92000000fa8 R14: ffffffff814e0720 R15: ffff88801d00d000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555a4c708 CR3: 000000005a2e4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1514 [inline] __run_timers.part.0+0x4a3/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:lock_acquire+0x1ef/0x570 kernel/locking/lockdep.c:5634 Code: f6 a3 7e 83 f8 01 0f 85 e8 02 00 00 9c 58 f6 c4 02 0f 85 fb 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90003b3f948 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000767f2b RCX: 0000000000000001 RDX: 1ffff110097488ae RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff90a8c96f R10: fffffbfff215192d R11: 1ffffffff20367ea R12: 0000000000000000 R13: 0000000000000000 R14: ffff88801d00d138 R15: 0000000000000000 __flush_workqueue+0x110/0x13a0 kernel/workqueue.c:2809 drain_workqueue+0x1a5/0x3c0 kernel/workqueue.c:2974 hci_dev_close_sync+0x2ef/0x1200 net/bluetooth/hci_sync.c:4809 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554 hci_unregister_dev+0x17f/0x4e0 net/bluetooth/hci_core.c:2702 vhci_release+0x7c/0xf0 drivers/bluetooth/hci_vhci.c:568 __fput+0x277/0x9d0 fs/file_table.c:320 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xad5/0x29b0 kernel/exit.c:795 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934 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+0x63/0xcd RIP: 0033:0x7ff7e8c8b5a9 Code: Unable to access opcode bytes at 0x7ff7e8c8b57f. RSP: 002b:00007fffa69b8e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007ff7e8c8b5a9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 RBP: 0000000000000000 R08: 000000000000002e R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff7e8ce6816 R13: 000000000000000b R14: 0000000000000001 R15: 00007fffa69b9060 ---------------- Code disassembly (best guess): 0: f6 a3 7e 83 f8 01 mulb 0x1f8837e(%rbx) 6: 0f 85 e8 02 00 00 jne 0x2f4 c: 9c pushfq d: 58 pop %rax e: f6 c4 02 test $0x2,%ah 11: 0f 85 fb 02 00 00 jne 0x312 17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24