rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=156/1/0x4000000000000000 softirq=193781/193783 fqs=4096 (t=10501 jiffies g=313873 q=3858) NMI backtrace for cpu 1 CPU: 1 PID: 17838 Comm: syz-executor.3 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 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+0x1f4/0x230 kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 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:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:ipv6_get_lladdr+0xa4/0x480 net/ipv6/addrconf.c:1857 Code: 45 84 e4 0f 84 f0 02 00 00 e8 28 d9 c7 f9 48 8d bb 48 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 c7 03 00 00 4c 8b b3 48 03 00 00 e8 8a a0 4e 01 31 ff 89 c3 RSP: 0018:ffffc90000db0c30 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8881645e0000 RCX: 0000000000000100 RDX: 1ffff1102c8bc069 RSI: ffffffff87aaf098 RDI: ffff8881645e0348 RBP: ffffc90000db0c70 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff87aaf399 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8881619fb35c R14: ffff8881619fb000 R15: 0000000000000040 addrconf_rs_timer+0x3bc/0x820 net/ipv6/addrconf.c:3873 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 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:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:123 Code: 06 44 89 e0 41 5c c3 e8 a4 72 00 00 84 c0 74 41 e8 cb 87 00 00 84 c0 74 38 be ff ff ff ff 48 c7 c7 60 38 37 8b e8 c6 c4 9a 07 <85> c0 75 d3 65 8b 05 6b 24 a3 7e a9 ff ff ff 7f 75 c5 9c 41 5c 49 RSP: 0018:ffffc90016b57b18 EFLAGS: 00000292 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffffffff1a075db RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 1ffff92002d6af67 R08: 0000000000000000 R09: ffffffff8d037d0f R10: fffffbfff1a06fa1 R11: 1ffffffff166f791 R12: 0000000000000001 R13: ffff88816e36c000 R14: ffff888161bd6b98 R15: ffff88816e36c308 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x5b7/0x710 kernel/locking/lockdep.c:5448 rcu_lock_release include/linux/rcupdate.h:264 [inline] rcu_read_unlock include/linux/rcupdate.h:702 [inline] perf_event_init_userpage kernel/events/core.c:5677 [inline] perf_mmap+0x12e8/0x1780 kernel/events/core.c:6196 call_mmap include/linux/fs.h:1906 [inline] mmap_region+0xcde/0x1730 mm/mmap.c:1807 do_mmap+0xcff/0x11d0 mm/mmap.c:1583 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:519 ksys_mmap_pgoff+0x49c/0x620 mm/mmap.c:1634 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4b8cdbfc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 RBP: 000000000119bfd8 R08: 0000000000000004 R09: 0000000000000000 R10: 0000200000000011 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffde565536f R14: 00007f4b8cdc09c0 R15: 000000000119bf8c