Bluetooth: hci3 command 0x0401 tx timeout watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:7990] Modules linked in: irq event stamp: 6384 hardirqs last enabled at (6383): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (6384): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (1160): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (747): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (747): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 7990 Comm: syz-executor.4 Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888099eee240 task.stack: ffff888083110000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:queued_write_lock_slowpath+0xcb/0x1d0 kernel/locking/qrwlock.c:139 RSP: 0018:ffff888083117d38 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000101 RBX: ffffffff89dd4428 RCX: 0000000000006d7e RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89dd4428 RBP: ffffffff89dd442c R08: ffffffff8b9c66b0 R09: 0000000000040599 R10: ffff888099eeeaf0 R11: ffff888099eee240 R12: 0000000000000003 R13: fffffbfff13ba885 R14: 00000000000000ff R15: ffffffff8863a320 FS: 00007fdb17d91700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 00000000aad90000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:134 [inline] do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203 bt_sock_link+0x1f/0x120 net/bluetooth/af_bluetooth.c:143 hci_sock_create+0x15c/0x1d0 net/bluetooth/hci_sock.c:2017 bt_sock_create+0x13b/0x280 net/bluetooth/af_bluetooth.c:130 __sock_create+0x303/0x620 net/socket.c:1275 sock_create net/socket.c:1315 [inline] SYSC_socket net/socket.c:1345 [inline] SyS_socket+0xd1/0x1b0 net/socket.c:1325 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x4665f9 RSP: 002b:00007fdb17d91128 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001f RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffeff4794cf R14: 00007fdb17d91300 R15: 0000000000022000 Code: 75 dc 49 89 dd 49 89 dc 41 be ff 00 00 00 49 c1 ed 03 41 83 e4 07 48 b8 00 00 00 00 00 fc ff df 49 01 c5 41 83 c4 03 eb 02 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 9e 00 00 00 8b 03 83 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff87229f8e