IPv6: ADDRCONF(NETDEV_UP): veth1707: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan719: link is not ready rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=f66/1/0x4000000000000004 softirq=316579/316579 fqs=10 rcu: (t=10501 jiffies g=350809 q=362) rcu: rcu_preempt kthread starved for 10482 jiffies! g350809 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29104 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 0 CPU: 0 PID: 12765 Comm: syz-executor.4 Not tainted 4.19.102-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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682 update_process_times+0x32/0x80 kernel/time/timer.c:1638 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:168 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:mrp_periodic_timer+0x46/0x50 net/802/mrp.c:618 Code: e8 1f 36 7c 01 be 0c 00 00 00 4c 89 ef e8 f2 fe ff ff 4c 89 ef e8 5a de ff ff 4c 89 e7 e8 22 38 7c 01 4c 89 ef e8 1a d1 ff ff <41> 5c 41 5d 5d c3 0f 1f 40 00 55 48 89 e5 41 57 41 56 41 55 49 89 RSP: 0018:ffff8880ae807cf8 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff888097a2fa58 RCX: 1ffff11015d00f88 RDX: 0000000000000100 RSI: ffffffff815ba6e6 RDI: 0000000000000001 RBP: ffff8880ae807d08 R08: ffff888010a564c0 R09: ffff888010a56d88 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888097a2faa0 R13: ffff888097a2fa00 R14: 1ffff11015d00fa6 R15: 0000000000000000 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697 __do_softirq+0x25c/0x921 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:zap_pte_range mm/memory.c:1323 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1440 [inline] RIP: 0010:zap_pud_range mm/memory.c:1469 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1490 [inline] RIP: 0010:unmap_page_range+0x9c9/0x1fb0 mm/memory.c:1511 Code: 20 ff ff ff 00 49 89 c7 0f 85 02 0f 00 00 e8 8e c9 d5 ff 48 8b 85 50 ff ff ff 48 8d 78 20 48 89 f8 48 c1 e8 03 42 0f b6 04 20 <84> c0 74 06 0f 8e 5a 13 00 00 48 8b 85 50 ff ff ff 31 ff 0f b6 40 RSP: 0018:ffff88800bf3f708 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 00007fe4a9fa2000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff819541f2 RDI: ffff88800bf3f968 RBP: ffff88800bf3f868 R08: ffff888010a564c0 R09: fffff940003fbb87 R10: fffff940003fbb86 R11: ffffea0001fddc33 R12: dffffc0000000000 R13: 0000000000000001 R14: 800000007f771007 R15: ffffea0001fddc40 unmap_single_vma+0x19d/0x300 mm/memory.c:1556 unmap_vmas+0xae/0x180 mm/memory.c:1586 exit_mmap+0x2c2/0x530 mm/mmap.c:3091 __mmput kernel/fork.c:1015 [inline] mmput+0x15f/0x4c0 kernel/fork.c:1036 exit_mm kernel/exit.c:546 [inline] do_exit+0xb1e/0x30d0 kernel/exit.c:867 do_group_exit+0x135/0x370 kernel/exit.c:983 get_signal+0x3ec/0x1fc0 kernel/signal.c:2583 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b399 Code: Bad RIP value. RSP: 002b:00007fe4a955bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000005 RBX: 00007fe4a955c6d4 RCX: 000000000045b399 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000002 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000b4d R14: 00000000004cc390 R15: 000000000075bf2c