rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10040 ticks this GP) idle=b16/1/0x4000000000000000 softirq=64754/64755 fqs=5234
(t=10502 jiffies g=102365 q=232)
NMI backtrace for cpu 0
CPU: 0 PID: 29701 Comm: syz-executor.4 Not tainted 5.10.0-rc6-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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191
Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 fa 3a 6e f8 48 89 ef e8 82 ef 6e f8 f6 c7 02 75 1a 53 9d 01 00 00 00 e8 91 5b 63 f8 65 8b 05 9a 05 1a 77 85 c0 74 0a 5b
RSP: 0018:ffffc90000007e10 EFLAGS: 00000286
RAX: 0000000001d45030 RBX: 0000000000000286 RCX: 1ffffffff19d8e89
RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000
RBP: ffff8880b9e26900 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880b9e26900
R13: ffff8880b9e26b80 R14: ffffffff850f31d0 R15: dffffc0000000000
__run_hrtimer kernel/time/hrtimer.c:1515 [inline]
__hrtimer_run_queues+0x5c0/0xea0 kernel/time/hrtimer.c:1583
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
__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:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:4789
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 82 4c 64 f8 e8 4d b2 8e f8 fb bf 01 00 00 00 82 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 f0 34 64
RSP: 0018:ffffc900029b7658 EFLAGS: 00000206
RAX: 0000000000bbb68d RBX: ffff8880416c0000 RCX: 1ffffffff19d8e89
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed10082d8000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit_cond_resched kernel/entry/common.c:357 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:349 [inline]
irqentry_exit+0x7a/0xa0 kernel/entry/common.c:387
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:preempt_schedule+0x7/0x20 kernel/sched/core.c:4709
Code: ff 45 31 ed e8 3a 69 6f f8 eb d6 48 89 df e8 80 7a ca f8 eb ad e8 f9 7a ca f8 eb da 0f 1f 80 00 00 00 00 65 8b 05 29 e7 1a 77 ff ff ff 7f 74 01 c3 9c 58 f6 c4 02 74 f8 e9 25 ff ff ff 0f 1f
RSP: 0018:ffffc900029b7728 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc900029b7778 R08: 0000000000000000 R09: ffff888058b599c3
R10: ffffed100b16b338 R11: 0000000000000000 R12: ffff88806934b9d0
R13: 0000000000000000 R14: dffffc0000000000 R15: 00007f711c3fd000
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40
__raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:183
spin_unlock include/linux/spinlock.h:394 [inline]
zap_pte_range mm/memory.c:1309 [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+0xf98/0x2640 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:3222
__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: 0033:0x45e0f9
Code: Unable to access opcode bytes at RIP 0x45e0cf.
RSP: 002b:00007f711b00dc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007
RAX: fffffffffffffdfc RBX: 0000000000000003 RCX: 000000000045e0f9
RDX: 0000000000000081 RSI: 0000000000000002 RDI: 0000000020000140
RBP: 000000000119c1b8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c184
R13: 00007ffd6883a83f R14: 00007f711b00e9c0 R15: 000000000119c184