watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.5:12820] Modules linked in: irq event stamp: 5046 hardirqs last enabled at (5045): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (5046): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (962): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (905): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (905): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 1 PID: 12820 Comm: syz-executor.5 Not tainted 4.14.289-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 task: ffff88807f7ee140 task.stack: ffff88809d660000 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:queued_write_lock_slowpath+0xd0/0x1d0 kernel/locking/qrwlock.c:139 RSP: 0018:ffff88809d667d38 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: ffffffff89dd8468 RCX: 0000000000003c68 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89dd8468 RBP: ffffffff89dd846c R08: ffffffff8b9bee40 R09: 0000000000040586 R10: ffff88807f7ee9f0 R11: ffff88807f7ee140 R12: 0000000000000003 R13: fffffbfff13bb08d R14: 00000000000000ff R15: ffffffff8863e480 FS: 00007f80810ad700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f808278c420 CR3: 000000009f462000 CR4: 00000000003406e0 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:2034 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: 0033:0x7f8082738209 RSP: 002b:00007f80810ad108 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f808284af60 RCX: 00007f8082738209 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001f RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4ebd9e7f R14: 00007f80810ad300 R15: 0000000000022000 Code: 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 f8 01 75 e5 f0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8723e50e