protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=1a6/1/0x4000000000000004 softirq=94142/94143 fqs=0 (t=10500 jiffies g=111513 q=993) rcu: rcu_preempt kthread starved for 10500 jiffies! g111513 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28784 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x7b7/0xc30 kernel/sched/core.c:4078 schedule+0x131/0x1e0 kernel/sched/core.c:4145 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1799 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 23898 Comm: syz-executor.2 Not tainted 5.4.0-rc7+ #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+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2795 [inline] rcu_sched_clock_irq+0xe22/0x1ae0 kernel/rcu/tree.c:2244 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:last_aligned_frame arch/x86/kernel/unwind_frame.c:104 [inline] RIP: 0010:is_last_aligned_frame arch/x86/kernel/unwind_frame.c:110 [inline] RIP: 0010:is_last_task_frame arch/x86/kernel/unwind_frame.c:162 [inline] RIP: 0010:unwind_next_frame+0x145/0x7a0 arch/x86/kernel/unwind_frame.c:272 Code: 80 3c 27 00 74 08 4c 89 ef e8 57 13 78 00 4d 8b 65 00 49 8d bc 24 48 7f 00 00 49 39 fe 0f 84 28 01 00 00 49 81 c4 58 7f 00 00 <49> 8d 44 24 e8 48 89 45 c0 49 39 c6 75 5f 48 89 f8 48 c1 e8 03 48 RSP: 0018:ffff8880aea09608 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11015d412db RBX: ffff8880a8608100 RCX: 0000000000000101 RDX: 0000000000000015 RSI: 0000000000000040 RDI: ffff888095357f48 RBP: ffff8880aea096a0 R08: ffffffff81627d9d R09: ffff8880aea096b0 R10: ffffed1015d412e2 R11: 0000000000000000 R12: ffff888095357f58 R13: ffff8880a8608118 R14: ffff888095357ad0 R15: 1ffff110150c1023 arch_stack_walk+0xb4/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xb6/0x150 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:69 [inline] set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:510 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:518 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3319 [inline] kmem_cache_alloc+0x1f5/0x2e0 mm/slab.c:3483 dst_alloc+0x173/0x580 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:353 [inline] icmp6_dst_alloc+0x7b/0x510 net/ipv6/route.c:3133 ndisc_send_skb+0x262/0xe20 net/ipv6/ndisc.c:485 ndisc_send_rs+0x4ec/0x680 net/ipv6/ndisc.c:699 addrconf_rs_timer+0x22e/0x5f0 net/ipv6/addrconf.c:3879 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x7b6/0x990 kernel/time/timer.c:1773 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786 __do_softirq+0x333/0x7c4 arch/x86/include/asm/paravirt.h:766 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:check_kcov_mode kernel/kcov.c:79 [inline] RIP: 0010:write_comp_data kernel/kcov.c:123 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x21/0x80 kernel/kcov.c:196 Code: 2e 0f 1f 84 00 00 00 00 00 4c 8b 04 24 65 48 8b 14 25 c0 fd 01 00 65 8b 05 a8 a2 8e 7e a9 00 01 1f 00 75 61 8b 82 f8 12 00 00 <83> f8 03 75 56 48 8b 8a 00 13 00 00 44 8b 8a fc 12 00 00 49 c1 e1 RSP: 0018:ffff888095357708 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000875 RCX: ffff8880a8608100 RDX: ffff8880a8608100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880953578c8 R08: ffffffff819e060d R09: fffff940004731f1 R10: fffff940004731f1 R11: 0000000000000000 R12: ffffea0002398f80 R13: ffffea0002398f88 R14: ffffea00023b1608 R15: 1ffffd40004731f1 unmap_single_vma+0x1d4/0x2e0 mm/memory.c:1282 unmap_vmas+0x163/0x2a0 mm/memory.c:1314 exit_mmap+0x27b/0x530 mm/mmap.c:3161 __mmput+0x120/0x3a0 kernel/fork.c:1079 mmput+0x5d/0x70 kernel/fork.c:1100 exit_mm+0x50a/0x590 kernel/exit.c:485 do_exit+0x565/0x2190 kernel/exit.c:804 do_group_exit+0x15c/0x2b0 kernel/exit.c:921 get_signal+0x4ac/0x1d60 kernel/signal.c:2734 do_signal+0x37/0x640 arch/x86/kernel/signal.c:815 exit_to_usermode_loop arch/x86/entry/common.c:159 [inline] prepare_exit_to_usermode+0x303/0x580 arch/x86/entry/common.c:194 retint_user+0x8/0x18 RIP: 0033:0x4158ab Code: 4c 8b 4c 24 10 89 ee 4c 8b 44 24 18 48 89 df e8 cb f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 48 f7 d8 64 89 04 25 d4 ff ff ff <48> 83 c8 ff c3 48 81 ec 98 00 00 00 31 ff 31 c0 be 01 00 00 00 e8 RSP: 002b:00007f9a05b55c78 EFLAGS: 00000213 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000016 RBX: 0000000000000004 RCX: 000000000045a219 RDX: 00000000200002c0 RSI: 000000000000000e RDI: 0000000000000023 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000068 R11: 0000000000000246 R12: 00007f9a05b566d4 R13: 00000000004c792f R14: 00000000004dd7e0 R15: 00000000ffffffff net_ratelimit: 16 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1