rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): ------------[ cut here ]------------ WARNING: CPU: 1 PID: 24862 at kernel/sched/core.c:3013 rq_unlock kernel/sched/sched.h:1325 [inline] WARNING: CPU: 1 PID: 24862 at kernel/sched/core.c:3013 try_invoke_on_locked_down_task+0x12d/0x270 kernel/sched/core.c:3019 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 24862 Comm: syz-executor.1 Not tainted 5.8.0-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+0x1f0/0x31e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:235 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:547 RIP: 0010:try_invoke_on_locked_down_task+0x12d/0x270 kernel/sched/sched.h:1325 Code: f8 48 c1 e8 03 42 8a 04 38 84 c0 0f 85 10 01 00 00 8b 74 24 18 48 89 ef e8 b0 43 09 00 4c 89 ef e8 e8 1a cf 06 e9 a4 00 00 00 <0f> 0b e9 2b ff ff ff 48 c7 c1 44 ab 6d 89 80 e1 07 80 c1 03 38 c1 RSP: 0018:ffffc90000da8c50 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffff892eb640 RCX: 74288a2b689d9d00 RDX: ffffc90000da8d00 RSI: ffffffff8162b3b0 RDI: ffff88805ee7a1c0 RBP: ffffffff8162b3b0 R08: ffffffff817a86b4 R09: fffffbfff125d103 R10: fffffbfff125d103 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff892eb640 R14: ffff88805ee7a1c0 R15: dffffc0000000000 rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:634 [inline] rcu_pending kernel/rcu/tree.c:3635 [inline] rcu_sched_clock_irq+0x12bc/0x1eb0 kernel/rcu/tree.c:2518 update_process_times+0x130/0x1b0 kernel/time/timer.c:1710 tick_sched_handle kernel/time/tick-sched.c:176 [inline] tick_sched_timer+0x25e/0x410 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 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+0x94/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:592 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline] RIP: 0010:lock_acquire+0x1c7/0x730 kernel/locking/lockdep.c:5008 Code: c1 e8 03 80 3c 10 00 74 0c 48 c7 c7 b8 d8 2b 89 e8 5e 37 5a 00 48 83 3d 8e 0d d2 07 00 0f 84 08 05 00 00 48 8b 7c 24 10 57 9d <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 50 0f 85 df RSP: 0018:ffffc9001e7cf688 EFLAGS: 00000282 RAX: 1ffffffff1257b17 RBX: 0000000000000000 RCX: 0c83e464bf9568b4 RDX: dffffc0000000000 RSI: ffff8881f81eecb8 RDI: 0000000000000282 RBP: ffff8881f81eec8c R08: dffffc0000000000 R09: fffffbfff16354a1 R10: fffffbfff16354a1 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 1ffff1103f03dd91 R15: 0000000000000000 rcu_lock_acquire+0x20/0x30 include/linux/rcupdate.h:241 rcu_read_lock include/linux/rcupdate.h:634 [inline] lock_page_memcg+0x50/0x1c0 mm/memcontrol.c:1977 page_remove_rmap+0x2b/0x4f0 mm/rmap.c:1328 zap_pte_range+0xaeb/0x1dc0 mm/memory.c:1089 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+0xa75/0xbd0 mm/memory.c:1264 unmap_vmas+0x15d/0x2c0 mm/memory.c:1341 exit_mmap+0x276/0x550 mm/mmap.c:3162 __mmput+0x113/0x370 kernel/fork.c:1098 exit_mm+0x4cd/0x550 kernel/exit.c:483 do_exit+0x576/0x1f20 kernel/exit.c:793 do_group_exit+0x161/0x2d0 kernel/exit.c:903 get_signal+0x139b/0x1d30 kernel/signal.c:2743 do_signal+0x33/0x610 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:235 [inline] __prepare_exit_to_usermode+0xc3/0x1b0 arch/x86/entry/common.c:269 do_syscall_64+0x7f/0xe0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ccd9 Code: Bad RIP value. RSP: 002b:00007f5d66d61cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000078bf08 RCX: 000000000045ccd9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf08 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffcd1a42c3f R14: 00007f5d66d629c0 R15: 000000000078bf0c Kernel Offset: disabled Rebooting in 86400 seconds..