rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10250 ticks this GP) idle=096/1/0x4000000000000000 softirq=15271/15273 fqs=5219 (t=10500 jiffies g=17517 q=657) NMI backtrace for cpu 1 CPU: 1 PID: 12090 Comm: syz-executor.5 Not tainted 5.10.0-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+0x107/0x163 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x1e3/0x21e kernel/rcu/tree_stall.h:331 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline] check_cpu_stall kernel/rcu/tree_stall.h:637 [inline] rcu_pending kernel/rcu/tree.c:3694 [inline] rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567 update_process_times+0x77/0xd0 kernel/time/timer.c:1709 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68 Code: 48 c7 c7 60 64 1b 8b e8 fb e9 9e 02 e9 60 fb ff ff e8 01 b4 81 00 e9 cf fb ff ff cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 07 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 41 55 41 RSP: 0018:ffffc90000d90508 EFLAGS: 00000293 RAX: ffffffff81a16298 RBX: ffffc90000d90660 RCX: ffffc90000d90660 RDX: dffffc0000000000 RSI: ffffc90001daf900 RDI: ffffc90001daf900 RBP: ffffc90001daf900 R08: ffffffff8d6c903c R09: ffffffff8d6c9040 R10: 0000000000082081 R11: 0000000000000001 R12: ffffc90000d90618 R13: ffffc90001da8000 R14: ffffc90000d90668 R15: ffffc90000d90618 deref_stack_reg+0xee/0x150 arch/x86/kernel/unwind_orc.c:355 unwind_next_frame+0xc3b/0x1f90 arch/x86/kernel/unwind_orc.c:531 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:535 [inline] slab_alloc_node mm/slub.c:2891 [inline] slab_alloc mm/slub.c:2899 [inline] kmem_cache_alloc+0x1c6/0x440 mm/slub.c:2904 dst_alloc+0x9e/0x650 net/core/dst.c:93 ip6_dst_alloc+0x2e/0x100 net/ipv6/route.c:356 icmp6_dst_alloc+0x6d/0x6c0 net/ipv6/route.c:3167 ndisc_send_skb+0x1207/0x1720 net/ipv6/ndisc.c:488 ndisc_send_rs+0x12e/0x700 net/ipv6/ndisc.c:702 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3873 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1410 expire_timers kernel/time/timer.c:1455 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1747 __run_timers kernel/time/timer.c:1728 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1760 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x132/0x200 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631 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: fc ff ff 48 c7 c7 00 d5 38 8b 48 89 54 24 08 48 89 34 24 e8 22 b3 5e 02 48 8b 54 24 08 48 8b 34 24 e9 a1 fd ff ff 0f 1f 40 00 <65> 48 8b 14 25 00 f0 01 00 65 8b 05 10 eb 91 7e a9 00 01 ff 00 48 RSP: 0018:ffffc90001daf768 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81a0ddd6 RDX: 0000000000000001 RSI: ffff888014b71a40 RDI: 0000000000000005 RBP: ffff888010d1d100 R08: 0000000000000000 R09: ffffffff8cecad8f R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000002b8 R13: 0000000000000001 R14: dffffc0000000000 R15: 00000000010ff000 rcu_read_unlock_sched_notrace include/linux/rcupdate.h:779 [inline] trace_rss_stat+0x1df/0x290 include/trace/events/kmem.h:338 mm_trace_rss_stat mm/memory.c:161 [inline] add_mm_counter include/linux/mm.h:1892 [inline] add_mm_rss_vec mm/memory.c:491 [inline] zap_pte_range mm/memory.c:1303 [inline] zap_pmd_range mm/memory.c:1357 [inline] zap_pud_range mm/memory.c:1386 [inline] zap_p4d_range mm/memory.c:1407 [inline] unmap_page_range+0x100e/0x2640 mm/memory.c:1428 unmap_single_vma+0x198/0x300 mm/memory.c:1473 unmap_vmas+0x168/0x2e0 mm/memory.c:1505 exit_mmap+0x2b1/0x530 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1079 mmput+0x53/0x60 kernel/fork.c:1100 exit_mm kernel/exit.c:486 [inline] do_exit+0xa72/0x29b0 kernel/exit.c:796 do_group_exit+0x125/0x310 kernel/exit.c:906 get_signal+0x42a/0x1f10 kernel/signal.c:2758 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: Unable to access opcode bytes at RIP 0x45e12f. RSP: 002b:00007f3abc82cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: 0000000020ffc000 RBX: 0000000000000006 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000 RBP: 000000000119c128 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffdee1c319f R14: 00007f3abc82d9c0 R15: 000000000119c0dc