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: 0 PID: 10053 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: 0 PID: 10053 Comm: syz-executor.0 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:ffffc90000007bd8 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 1ffff92000000f7d RCX: 0000000000000000 RDX: ffff888028462280 RSI: ffffffff815d4f47 RDI: fffff52000000f6d RBP: ffff8880862984c0 R08: 0000000000000001 R09: ffff8880ae620fcb R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8160c580 R13: ffffc90000007d00 R14: ffff888028462280 R15: ffff8880ae636c00 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 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:596 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:196 Code: 48 89 ef 5d e9 01 07 3f 00 5d be 03 00 00 00 e9 a6 b2 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 90 47 8e 7e a9 00 01 ff 00 48 RSP: 0018:ffffc90010c97648 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dead000000000100 RCX: ffffffff81978fb3 RDX: 0000000000000000 RSI: ffff888028462280 RDI: 0000000000000007 RBP: 000000000000010e R08: 0000000000000001 R09: ffffea0002506237 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea0002506240 R14: ffff888045a4b888 R15: dffffc0000000000 page_ref_count include/linux/page_ref.h:67 [inline] put_page_testzero include/linux/mm.h:695 [inline] release_pages+0x171/0x17a0 mm/swap.c:871 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249 zap_pte_range mm/memory.c:1155 [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+0x1bd4/0x2940 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_fast_syscall_32 arch/x86/entry/common.c:448 [inline] do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:474 entry_SYSENTER_compat+0x6d/0x7c arch/x86/entry/entry_64_compat.S:138 RIP: 0023:0xf7ff5569 Code: Bad RIP value. RSP: 002b:00000000f5df012c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 RAX: fffffffffffffe00 RBX: 000000000819af68 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000819af6c RBP: 00000000f5df0228 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..