Modules linked in: irq event stamp: 4618356 hardirqs last enabled at (4618355): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (4618355): [] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:199 hardirqs last disabled at (4618356): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:702 softirqs last enabled at (4617976): [] __do_softirq+0x7ba/0xba3 kernel/softirq.c:310 softirqs last disabled at (4617969): [] invoke_softirq kernel/softirq.c:364 [inline] softirqs last disabled at (4617969): [] irq_exit+0x1cc/0x200 kernel/softirq.c:405 CPU: 1 PID: 8514 Comm: syz-executor5 Not tainted 4.13.0-rc7+ #61 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d769e440 task.stack: ffff8801c6388000 RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:75 [inline] RIP: 0010:delay_tsc+0x48/0x70 arch/x86/lib/delay.c:67 RSP: 0018:ffff8801c638ef60 EFLAGS: 00000203 ORIG_RAX: ffffffffffffff10 RAX: 000002f5e34fe488 RBX: ffffed0038c4c8f2 RCX: 000002f5e34fb7a7 RDX: 0000000000002ce1 RSI: 0000000000000001 RDI: 00000000000059d9 RBP: ffff8801c638ef60 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c638f208 R13: ffff8801c6264780 R14: ffff8801d4415bb0 R15: ffff8801c6264800 FS: 00007f1b91502700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000205a3fcc CR3: 00000001d5ef1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __delay arch/x86/lib/delay.c:160 [inline] __const_udelay+0x5b/0x70 arch/x86/lib/delay.c:174 snd_timer_close+0x2ee/0xf20 sound/core/timer.c:347 snd_timer_user_release+0x97/0x130 sound/core/timer.c:1403 __fput+0x327/0x7e0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:246 task_work_run+0x18a/0x260 kernel/task_work.c:116 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xa3a/0x1b10 kernel/exit.c:865 do_group_exit+0x149/0x400 kernel/exit.c:969 get_signal+0x7e8/0x17e0 kernel/signal.c:2334 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:157 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263 entry_SYSCALL_64_fastpath+0xbc/0xbe RIP: 0033:0x451e59 RSP: 002b:00007f1b91501c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000101 RAX: 0000000000000006 RBX: 0000000000718000 RCX: 0000000000451e59 RDX: 0000000000101000 RSI: 0000000020bd8000 RDI: ffffffffffffff9c RBP: 0000000000004080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004ba4eb R13: 00000000ffffffff R14: ffffffffffffff9c R15: 0000000020bd8000 Code: d1 48 09 c1 0f ae e8 0f 31 48 c1 e2 20 48 09 d0 48 89 c2 48 29 ca 48 39 fa 73 25 65 ff 0d 61 79 2d 7b f3 90 65 ff 05 58 79 2d 7b <65> 8b 15 29 46 2d 7b 39 f2 74 ce 48 29 c1 89 d6 48 01 cf eb b5