watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz-executor.0:22714] Modules linked in: irq event stamp: 45026 hardirqs last enabled at (45025): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 hardirqs last disabled at (45026): [] idtentry_enter_cond_rcu+0x1d/0x50 arch/x86/entry/common.c:649 softirqs last enabled at (39316): [] __do_softirq+0x748/0xa60 kernel/softirq.c:319 softirqs last disabled at (39307): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 CPU: 0 PID: 22714 Comm: syz-executor.0 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x197/0x4f0 kernel/smp.c:382 Code: 48 8d 74 24 40 48 89 44 24 50 48 8b 44 24 08 48 89 44 24 58 e8 fa f9 ff ff 41 89 c5 eb 07 e8 f0 ff 0a 00 f3 90 44 8b 64 24 48 <31> ff 41 83 e4 01 44 89 e6 e8 5b fc 0a 00 45 85 e4 75 e1 e8 d1 ff RSP: 0000:ffffc9000d397940 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 1ffff92001a72f2c RCX: ffffffff8168b785 RDX: ffff888086c38440 RSI: ffffffff8168b770 RDI: 0000000000000005 RBP: ffffc9000d397a20 R08: 0000000000000001 R09: ffff8880ae736dc7 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000011 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000040 FS: 00000000027e4940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000078c000 CR3: 0000000096323000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0x1a4/0x990 kernel/smp.c:518 on_each_cpu_cond_mask+0x50/0x290 kernel/smp.c:766 __flush_tlb_others arch/x86/include/asm/paravirt.h:74 [inline] flush_tlb_others arch/x86/mm/tlb.c:856 [inline] flush_tlb_mm_range+0x295/0x4d0 arch/x86/mm/tlb.c:943 flush_tlb_page arch/x86/include/asm/tlbflush.h:235 [inline] ptep_clear_flush+0x12b/0x160 mm/pgtable-generic.c:97 wp_page_copy+0x919/0x1870 mm/memory.c:2713 do_wp_page+0x6a1/0x1950 mm/memory.c:2982 handle_pte_fault mm/memory.c:4243 [inline] __handle_mm_fault mm/memory.c:4357 [inline] handle_mm_fault+0x2aed/0x43f0 mm/memory.c:4394 do_user_addr_fault+0x5a2/0xd00 arch/x86/mm/fault.c:1295 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0xab/0x170 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:544 RIP: 0033:0x410225 Code: Bad RIP value. RSP: 002b:00007ffd3922e420 EFLAGS: 00010297 RAX: 0000000000000030 RBX: 000000000078bfac RCX: 0000000000000000 RDX: 00000000000000a0 RSI: 00007ff5108a6db0 RDI: 000000000078bfa8 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 00007ff5108a7700 R10: 00007ff5108a79d0 R11: 0000000000000202 R12: 0000000000000064 R13: 0000000000000001 R14: 0000000000000bd3 R15: 000000000078bfac Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 22728 Comm: syz-executor.0 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:197 Code: 5d be 03 00 00 00 e9 f6 bf 23 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 48 8b 14 25 00 ff 01 00 <65> 8b 05 50 47 8e 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 RSP: 0018:ffffc90000da8d70 EFLAGS: 00000002 RAX: 0000000080010001 RBX: 0000000000000001 RCX: ffffffff86620253 RDX: ffff888052dae400 RSI: ffff888052dae400 RDI: 0000000000000001 RBP: 0000000140000002 R08: 0000000000000001 R09: ffff88809779418f R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a6c68080 R13: 1724085e2e4810bc R14: ffff8880a6c680a0 R15: 1724085e2e4810bc FS: 00007ff5108c8700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000400200 CR3: 0000000096323000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:687 [inline] advance_sched+0x550/0x990 net/sched/sch_taprio.c:754 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:on_each_cpu+0x149/0x240 kernel/smp.c:702 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e6 00 00 00 48 83 3d 97 12 4c 08 00 0f 84 af 00 00 00 e8 6c e9 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 5d e9 0a 00 bf 01 00 00 00 e8 83 a4 e6 ff 31 ff RSP: 0018:ffffc9000d3d7d70 EFLAGS: 00000212 RAX: 0000000000000537 RBX: 0000000000000212 RCX: ffffc90001919000 RDX: 0000000000040000 RSI: ffffffff8168cdf4 RDI: 0000000000000212 RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffc9000d3d7ed0 R15: ffffffffa0f9bc68 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872 do_settimeofday64 kernel/time/timekeeping.c:1257 [inline] do_settimeofday64+0x350/0x4e0 kernel/time/timekeeping.c:1223 do_sys_settimeofday64 kernel/time/time.c:195 [inline] do_sys_settimeofday64+0x1de/0x260 kernel/time/time.c:169 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline] __x64_sys_clock_settime+0x197/0x260 kernel/time/posix-timers.c:1067 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cba9 Code: Bad RIP value. RSP: 002b:00007ff5108c7c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00000000004db920 RCX: 000000000045cba9 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000007b R14: 00000000004c352c R15: 00007ff5108c86d4