watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor5:7631] Modules linked in: irq event stamp: 294872 hardirqs last enabled at (294871): [] restore_regs_and_return_to_kernel+0x0/0x26 hardirqs last disabled at (294872): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:791 softirqs last enabled at (243070): [] __do_softirq+0x733/0xbb2 kernel/softirq.c:311 softirqs last disabled at (243049): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (243049): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 0 PID: 7631 Comm: syz-executor5 Not tainted 4.14.0-mm1+ #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801cf2b6080 task.stack: ffff8801cead0000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x374/0x560 kernel/smp.c:302 RSP: 0018:ffff8801cead6700 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff11 RAX: ffff8801cf2b6080 RBX: 1ffff10039d5ace8 RCX: ffffffff8164f922 RDX: 0000000000000000 RSI: 00000000000000fb RDI: ffff8801cead67f8 RBP: ffff8801cead6850 R08: 1ffff10039d5ad00 R09: 0000000000000000 R10: ffff8801cead6880 R11: 0000000000000000 R12: ffff8801cead67f8 R13: dffffc0000000000 R14: 0000000000000000 R15: ffffed0039d5acf4 FS: 00007ff338406700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efd1e69d300 CR3: 00000001cce5a000 CR4: 00000000001426f0 DR0: 0000000020001000 DR1: 0000000020001000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: smp_call_function_many+0x773/0x930 kernel/smp.c:434 smp_call_function kernel/smp.c:492 [inline] on_each_cpu+0x3d/0x1b0 kernel/smp.c:602 text_poke_bp+0xbb/0x170 arch/x86/kernel/alternative.c:807 __jump_label_transform.isra.0+0x6a5/0x8a0 arch/x86/kernel/jump_label.c:102 arch_jump_label_transform+0x2f/0x40 arch/x86/kernel/jump_label.c:110 __jump_label_update+0x207/0x2d0 kernel/jump_label.c:368 jump_label_update+0x22c/0x2b0 kernel/jump_label.c:735 static_key_slow_dec_cpuslocked+0x176/0x1d0 kernel/jump_label.c:204 __static_key_slow_dec kernel/jump_label.c:214 [inline] static_key_slow_dec+0x56/0x90 kernel/jump_label.c:228 tracepoint_remove_func kernel/tracepoint.c:253 [inline] tracepoint_probe_unregister+0x70d/0x870 kernel/tracepoint.c:324 trace_event_reg+0xed/0x320 kernel/trace/trace_events.c:309 perf_trace_event_unreg.isra.2+0xad/0x1f0 kernel/trace/trace_event_perf.c:155 perf_trace_destroy+0xbc/0x100 kernel/trace/trace_event_perf.c:236 tp_perf_event_destroy+0x15/0x20 kernel/events/core.c:7937 _free_event+0x3bd/0x10f0 kernel/events/core.c:4104 put_event+0x24/0x30 kernel/events/core.c:4187 perf_event_release_kernel+0x407/0xc10 kernel/events/core.c:4288 perf_release+0x37/0x50 kernel/events/core.c:4298 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x9bb/0x1ae0 kernel/exit.c:869 do_group_exit+0x149/0x400 kernel/exit.c:972 get_signal+0x73f/0x16c0 kernel/signal.c:2335 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x94/0x96 RIP: 0033:0x452879 RSP: 002b:00007ff338405ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 0000000000758270 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000758270 RBP: 0000000000758270 R08: 00000000000002be R09: 0000000000758248 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007ff3384069c0 R15: 0000000000000010 Code: 03 4c 01 e8 41 83 e7 01 c6 00 f8 74 4e 49 89 c7 49 83 c4 18 e8 be 25 0b 00 f3 90 4c 89 e2 41 c6 07 04 48 c1 ea 03 42 0f b6 14 2a <84> d2 74 09 80 fa 03 0f 8e 4f 01 00 00 41 0f b6 0f 8b 55 a8 84