rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (7583 ticks this GP) idle=26e/1/0x4000000000000000 softirq=9913/9913 fqs=95
(t=10501 jiffies g=8517 q=877)
rcu: rcu_preempt kthread starved for 8721 jiffies! g8517 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:3779 [inline]
__schedule+0x893/0x2130 kernel/sched/core.c:4528
schedule+0xcf/0x270 kernel/sched/core.c:4606
schedule_timeout+0x148/0x250 kernel/time/timer.c:1871
rcu_gp_fqs_loop kernel/rcu/tree.c:1925 [inline]
rcu_gp_kthread+0xb4c/0x1c90 kernel/rcu/tree.c:2099
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 0
CPU: 0 PID: 8787 Comm: syz-executor282 Not tainted 5.10.0-rc7-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:mac80211_hwsim_tx_frame_no_nl.isra.0+0x72e/0x1330 drivers/net/wireless/mac80211_hwsim.c:1445
Code: 44 24 08 e8 84 8f 60 fc 0f b6 44 24 08 84 c0 0f 85 a8 06 00 00 e8 62 97 60 fc e8 5d 97 60 fc 48 89 d8 48 c1 e8 03 80 3c 28 00 <0f> 85 93 09 00 00 48 8b 1b 48 81 fb 40 d4 ff 8b 0f 84 f7 04 00 00
RSP: 0018:ffffc90000007b88 EFLAGS: 00000246
RAX: 1ffff11005dd2624 RBX: ffff88802ee93120 RCX: ffffffff850f6ef3
RDX: ffff88803022b480 RSI: ffffffff850f6d13 RDI: 0000000000000004
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88802b3c93d7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888032c60000
R13: ffff88801526b350 R14: ffff88801526b120 R15: 0000000000000002
mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1705
mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1759
__iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:792
ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:828
mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1782
__run_hrtimer kernel/time/hrtimer.c:1519 [inline]
__hrtimer_run_queues+0x693/0xea0 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:__rcu_read_lock+0x6f/0x90 kernel/rcu/tree_plugin.h:382
Code: f0 01 00 48 8d bb 80 03 00 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 19 81 bb 80 03 00 00 ff ff ff 3f 7f 02 5b 0f 0b 5b c3 e8 47 ee 54 00 eb b3 e8 40 ee 54 00 eb e0 0f 1f 40
RSP: 0018:ffffc90002187940 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea0000b7be00 RCX: ffffffff81a1486c
RDX: 1ffff11006045700 RSI: ffffffff81a6287d RDI: ffff88803022b800
RBP: ffffea0000b7be00 R08: 0000000000000000 R09: ffffea0000b7be07
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0000b7be08
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000043c000
rcu_read_lock include/linux/rcupdate.h:639 [inline]
lock_page_memcg+0x43/0x260 mm/memcontrol.c:2144
page_remove_rmap+0x25/0x1c00 mm/rmap.c:1328
zap_pte_range mm/memory.c:1253 [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+0xe30/0x2640 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
__do_sys_exit_group kernel/exit.c:917 [inline]
__se_sys_exit_group kernel/exit.c:915 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:915
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446b18
Code: Unable to access opcode bytes at RIP 0x446aee.
RSP: 002b:00007fffec762338 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446b18
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004ce530 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006e3260 R14: 000000000000000d R15: 0000000000000004