rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2648 jiffies s: 5689 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5664 Comm: syz-executor451 Not tainted 6.4.0-rc4-syzkaller-00371-g6f64a5ebe1dc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 Code: b6 ee 8e 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be a8 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1e fa 65 8b 05 7d 75 7f 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0018:ffffc90000007618 EFLAGS: 00000246 RAX: ffff888078b592f0 RBX: ffff888072d4e750 RCX: 0000000000000100 RDX: ffff8880784d0000 RSI: ffffffff883f15a3 RDI: ffff888072d4e758 RBP: ffff888078b59000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 1ffffffff21941ca R12: dffffc0000000000 R13: ffff888078b592f0 R14: ffff888078b592f0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0181725370 CR3: 000000007d983000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fq_pie_qdisc_dequeue+0x5fd/0x9c0 net/sched/sch_fq_pie.c:239 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1b2/0x1780 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3868 [inline] __dev_queue_xmit+0x2215/0x3b10 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3085 [inline] neigh_connected_output+0x3c2/0x550 net/core/neighbour.c:1581 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0x55a/0x1560 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:122 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5681 [inline] RIP: 0010:lock_acquire+0x137/0x520 kernel/locking/lockdep.c:5670 Code: 05 6e 98 9c 7e 85 c0 0f 85 16 01 00 00 65 48 8b 14 25 c0 bb 03 00 48 8d ba c4 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 <48> c1 e9 03 0f b6 0c 01 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 RSP: 0018:ffffc900048ff5b0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff9200091feb8 RCX: ffff8880784d0ac4 RDX: ffff8880784d0000 RSI: 0000000000000001 RDI: ffff8880784d0ac4 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8e7a7f57 R10: fffffbfff1cf4fea R11: 0000000000094001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8c7990c0 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:327 [inline] rcu_read_lock include/linux/rcupdate.h:773 [inline] is_bpf_text_address+0x3a/0x1b0 kernel/bpf/core.c:719 kernel_text_address kernel/extable.c:125 [inline] kernel_text_address+0x3d/0x80 kernel/extable.c:94 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address arch/x86/kernel/unwind_orc.c:341 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:336 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122 save_stack+0x151/0x1e0 mm/page_owner.c:128 __reset_page_owner+0x56/0x170 mm/page_owner.c:149 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page_list+0xe3/0xa70 mm/page_alloc.c:2705 release_pages+0xcd8/0x1380 mm/swap.c:1042 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:97 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu mm/mmu_gather.c:299 [inline] tlb_finish_mmu+0x14b/0x7e0 mm/mmu_gather.c:391 exit_mmap+0x2b2/0x930 mm/mmap.c:3123 __mmput+0x128/0x4c0 kernel/fork.c:1351 mmput+0x60/0x70 kernel/fork.c:1373 exit_mm kernel/exit.c:567 [inline] do_exit+0x9b0/0x29b0 kernel/exit.c:861 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1033 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f01816a7859 Code: Unable to access opcode bytes at 0x7f01816a782f. RSP: 002b:00007fff49510f68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f0181722410 RCX: 00007f01816a7859 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 000000000000000d R10: 000000000000000d R11: 0000000000000246 R12: 00007f0181722410 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 4.506 msecs