rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (9952 ticks this GP) idle=c6a/1/0x4000000000000000 softirq=16295/16298 fqs=261
(t=10501 jiffies g=17713 q=389)
rcu: rcu_preempt kthread starved for 1144 jiffies! g17713 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:29176 pid: 11 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5064
schedule+0xcf/0x270 kernel/sched/core.c:5143
schedule_timeout+0x148/0x250 kernel/time/timer.c:1878
rcu_gp_fqs_loop kernel/rcu/tree.c:1940 [inline]
rcu_gp_kthread+0xbbe/0x1d70 kernel/rcu/tree.c:2113
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 1
CPU: 1 PID: 10959 Comm: syz-executor.5 Not tainted 5.11.0-rc1-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+0x1e3/0x21e 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+0x472/0xec3 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+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: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:__orc_find+0x4d/0xf0 arch/x86/kernel/unwind_orc.c:50
Code: 0f 87 9a 00 00 00 49 bf 00 00 00 00 00 fc ff df 49 89 fe 48 89 fd eb 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 <48> 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00
RSP: 0018:ffffc90000d90500 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8cff573c RCX: ffffffff8172759d
RDX: 0000000000000000 RSI: ffffffff8d6b4640 RDI: ffffffff8cff5738
RBP: ffffffff8cff5740 R08: ffffffff8d6b4670 R09: ffffffff8d6b4640
R10: 0000000000082083 R11: 000000000001baa2 R12: ffffffff8cff5740
R13: ffffffff8cff5738 R14: ffffffff8cff573c R15: dffffc0000000000
orc_find arch/x86/kernel/unwind_orc.c:173 [inline]
unwind_next_frame+0x342/0x1f90 arch/x86/kernel/unwind_orc.c:443
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:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:401 [inline]
____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429
kasan_slab_alloc include/linux/kasan.h:205 [inline]
slab_post_alloc_hook mm/slab.h:512 [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:3874
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+0x2a5/0x9f7 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:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:5326
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 c2 37 60 f8 e8 3d 1a 8b f8 fb bf 01 00 00 00 02 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 50 1f 60
RSP: 0018:ffffc900017ff568 EFLAGS: 00000202
RAX: 0000000000f959b3 RBX: ffff888014bf3780 RCX: 1ffffffff19de3b1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100297e6f0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81784598 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit_cond_resched kernel/entry/common.c:393 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:197
Code: 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 00 fd ff ff 66 0f 1f 84 00 00 00 00 00 65 8b 05 29 7a 8f 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc900017ff630 EFLAGS: 00000283
RAX: 0000000080000000 RBX: dead000000000100 RCX: 0000000080000000
RDX: ffff888014bf3780 RSI: ffffffff81991abd RDI: 0000000000000003
RBP: ffffea0001a2c0c0 R08: 0000000000000000 R09: 0000000001a2c000
R10: ffffffff81991a8c R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880236b21b8 R14: 0000000000000034 R15: dffffc0000000000
page_zonenum include/linux/mm.h:1102 [inline]
is_zone_device_page include/linux/mm.h:1108 [inline]
release_pages+0x15d/0x1d20 mm/swap.c:881
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249
zap_pte_range mm/memory.c:1330 [inline]
zap_pmd_range mm/memory.c:1368 [inline]
zap_pud_range mm/memory.c:1397 [inline]
zap_p4d_range mm/memory.c:1418 [inline]
unmap_page_range+0x1a75/0x2640 mm/memory.c:1439
unmap_single_vma+0x198/0x300 mm/memory.c:1484
unmap_vmas+0x168/0x2e0 mm/memory.c:1516
exit_mmap+0x2b1/0x5a0 mm/mmap.c:3220
__mmput+0x122/0x470 kernel/fork.c:1083
mmput+0x53/0x60 kernel/fork.c:1104
exit_mm kernel/exit.c:501 [inline]
do_exit+0xb6a/0x2ae0 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x3ec/0x2010 kernel/signal.c:2770
arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
handle_signal_work kernel/entry/common.c:147 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f64be9b0c68 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: fffffffffffffdfe RBX: 0000000000000006 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000040
RBP: 000000000119bfd8 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff1068866f R14: 00007f64be9b19c0 R15: 000000000119bf8c