rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ IRQs not enabled as expected WARNING: CPU: 1 PID: 325 at kernel/sched/core.c:2698 try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 325 Comm: syz-executor.1 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x45 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563 RIP: 0010:try_invoke_on_locked_down_task+0x2bf/0x370 kernel/sched/core.c:2698 Code: ff d4 41 89 c6 e9 18 ff ff ff 80 3d 27 c9 58 09 00 0f 85 6f fe ff ff 48 c7 c7 c0 40 4b 88 c6 05 13 c9 58 09 01 e8 f3 47 f4 ff <0f> 0b e9 55 fe ff ff 4c 89 04 24 4c 89 ee 48 89 ef 41 ff d4 4c 8b RSP: 0018:ffffc90000da8768 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 1ffff920001b50ef RCX: 0000000000000000 RDX: ffff88802129e040 RSI: ffffffff815d4f47 RDI: fffff520001b50df RBP: ffff8880a7234200 R08: 0000000000000001 R09: ffff8880ae720fcb R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8160c580 R13: ffffc90000da8890 R14: ffff88802129e040 R15: ffff8880ae736c00 rcu_print_task_stall kernel/rcu/tree_stall.h:269 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:477 [inline] check_cpu_stall kernel/rcu/tree_stall.h:636 [inline] rcu_pending kernel/rcu/tree.c:3489 [inline] rcu_sched_clock_irq.cold+0x92e/0xccc kernel/rcu/tree.c:2504 update_process_times+0x25/0x60 kernel/time/timer.c:1726 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x1d5/0xfc0 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 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0x4f/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191 Code: 48 c7 c0 40 e0 b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d fb a6 cd 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 f5 38 68 f9 65 8b 05 5e c5 1a 78 RSP: 0018:ffffc90000da8c50 EFLAGS: 00000282 RAX: 1ffffffff1369c08 RBX: 0000000000000282 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282 RBP: ffff8880ae7255c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880ae7255c0 R13: 000000010000b74e R14: 000000010000b75a R15: 0000000000000000 __mod_timer+0x669/0xf40 kernel/time/timer.c:1057 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773 __run_timers kernel/time/timer.c:1745 [inline] run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786 __do_softirq+0x34c/0xa60 kernel/softirq.c:292 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] do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:387 [inline] __irq_exit_rcu kernel/softirq.c:417 [inline] irq_exit_rcu+0x229/0x270 kernel/softirq.c:429 sysvec_apic_timer_interrupt+0x54/0x120 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:__sanitizer_cov_trace_cmp8+0x4/0x20 kernel/kcov.c:263 Code: 84 00 00 00 00 00 48 8b 0c 24 89 f2 89 fe bf 04 00 00 00 e9 2e ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 <48> 89 f2 48 89 fe bf 06 00 00 00 e9 0c ff ff ff 66 90 66 2e 0f 1f RSP: 0018:ffffc900049b7788 EFLAGS: 00000282 RAX: 0000000000000000 RBX: 00007f0a3f800000 RCX: ffffffff81a2eb20 RDX: ffff88802129e040 RSI: 00007f0a3f74d000 RDI: 00007f0a3f800000 RBP: ffffea000261d4f0 R08: 0000000000000000 R09: ffffea000261d4f3 R10: 0000000000000000 R11: 0000000000000000 R12: ffffea000261d4c8 R13: ffffea000261d4c0 R14: dffffc0000000000 R15: 00007f0a3f74d000 zap_pte_range mm/memory.c:1137 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0xfe0/0x2940 mm/memory.c:1264 unmap_single_vma+0x198/0x300 mm/memory.c:1309 unmap_vmas+0x16f/0x2f0 mm/memory.c:1341 exit_mmap+0x2b1/0x510 mm/mmap.c:3150 __mmput+0x122/0x470 kernel/fork.c:1093 mmput+0x53/0x60 kernel/fork.c:1114 exit_mm kernel/exit.c:482 [inline] do_exit+0xa8f/0x2a40 kernel/exit.c:792 do_group_exit+0x125/0x310 kernel/exit.c:903 get_signal+0x428/0x1fc0 kernel/signal.c:2739 do_signal+0x82/0x2520 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:212 [inline] __prepare_exit_to_usermode+0x156/0x1f0 arch/x86/entry/common.c:246 do_syscall_64+0x6c/0xe0 arch/x86/entry/common.c:368 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f0a3e10bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffe7 RBX: 00000000004e3be0 RCX: 000000000045cb29 RDX: 0000000020000200 RSI: 00000000c02064b2 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000296 R14: 00000000004d3a08 R15: 00007f0a3e10c6d4 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..