rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10500 ticks this GP) idle=9ce/1/0x4000000000000004 softirq=16291/16291 fqs=52 (t=10500 jiffies g=9753 q=1102) NMI backtrace for cpu 1 CPU: 1 PID: 9413 Comm: syz-executor257 Not tainted 5.6.0-rc5-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+0x1e9/0x30e lib/dump_stack.c:118 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x169/0x250 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:549 [inline] rcu_pending kernel/rcu/tree.c:3030 [inline] rcu_sched_clock_irq+0x171f/0x1970 kernel/rcu/tree.c:2276 update_process_times+0x12c/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:171 [inline] tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x3cf/0x7d0 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1144 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:49 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:173 [inline] RIP: 0010:unwind_next_frame+0x2bc/0x1cf0 arch/x86/kernel/unwind_orc.c:407 Code: 01 c8 48 83 e0 fe 49 8d 2c 46 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1d 48 63 45 00 48 01 e8 <4c> 39 e0 76 af 48 83 c5 fc 48 89 eb 49 39 de 76 b3 e9 43 01 00 00 RSP: 0018:ffffc90000da86a8 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: ffffffff86fb4059 RBX: ffffffff89a433ec RCX: dffffc0000000000 RDX: ffffffff8a2bddba RSI: ffffffff89a433c8 RDI: 0000000000000001 RBP: ffffffff89a433e4 R08: 0000000000000028 R09: ffffc90000da8818 R10: fffff520001b50f9 R11: 0000000000000000 R12: ffffffff86fb40cd R13: ffffc90000da8770 R14: ffffffff89a433dc R15: ffffffff89a433d8 arch_stack_walk+0xb4/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xad/0x150 kernel/stacktrace.c:123 save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc+0x118/0x1c0 mm/kasan/common.c:515 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x1f5/0x2d0 mm/slab.c:3484 dst_alloc+0x16c/0x570 net/core/dst.c:93 ip6_dst_alloc net/ipv6/route.c:355 [inline] icmp6_dst_alloc+0x7e/0x520 net/ipv6/route.c:3138 ndisc_send_skb+0x22d/0xd00 net/ipv6/ndisc.c:485 addrconf_rs_timer+0x226/0x680 net/ipv6/addrconf.c:3879 call_timer_fn+0x91/0x160 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x776/0x970 kernel/time/timer.c:1773 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1786 __do_softirq+0x268/0x7c5 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x223/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:css_tryget include/linux/cgroup.h:351 [inline] RIP: 0010:get_mem_cgroup_from_mm+0x108/0x1a0 mm/memcontrol.c:944 Code: 00 00 48 89 df e8 18 fe ff ff 49 89 c4 48 85 c0 74 2e 49 8d 5c 24 7c 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 75 22 f6 03 01 <75> 36 49 8d 7c 24 10 e8 4c 36 00 00 84 c0 0f 84 64 ff ff ff eb 22 RSP: 0018:ffffc900023b7a20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8880879da07c RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff890d9b08 RDI: 0000000000000282 RBP: 1ffff11012e36519 R08: ffffffff83988953 R09: ffffed1015d27004 R10: ffffed1015d27004 R11: 0000000000000000 R12: ffff8880879da000 R13: dffffc0000000000 R14: ffff8880971b2380 R15: ffff8880971b28c8 mem_cgroup_try_charge+0x1ec/0x530 mm/memcontrol.c:6367 mem_cgroup_try_charge_delay+0x22/0x90 mm/memcontrol.c:6384 do_anonymous_page+0x3d8/0x17f0 mm/memory.c:3209 handle_pte_fault mm/memory.c:4050 [inline] __handle_mm_fault mm/memory.c:4182 [inline] handle_mm_fault+0x1b3d/0x27f0 mm/memory.c:4219 faultin_page mm/gup.c:659 [inline] __get_user_pages+0xb7f/0x1660 mm/gup.c:870 populate_vma_page_range+0x1c8/0x220 mm/gup.c:1181 __mm_populate+0x283/0x3e0 mm/gup.c:1229 mm_populate include/linux/mm.h:2343 [inline] __do_sys_mlockall mm/mlock.c:823 [inline] __se_sys_mlockall+0x32c/0x370 mm/mlock.c:799 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44b9c9 Code: e8 7c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 1b 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6ec8b68ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 00000000006e8a08 RCX: 000000000044b9c9 RDX: 000000000044b9c9 RSI: 00000000000f4240 RDI: 0000000000000001 RBP: 00000000006e8a00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e8a0c R13: 00007ffed718badf R14: 00007f6ec8b699c0 R15: 20c49ba5e353f7cf