rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=1964/1/0x4000000000000000 softirq=28376/28378 fqs=1
rcu: (t=10502 jiffies g=35697 q=77 ncpus=2)
rcu: rcu_preempt kthread starved for 10501 jiffies! g35697 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:26488 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1609
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1808
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9501 Comm: syz-executor.5 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
RIP: 0010:kvm_wait+0x1c0/0x200 arch/x86/kernel/kvm.c:1060
Code: 03 42 0f b6 04 28 84 c0 75 46 45 0f b6 34 24 e8 56 fe 55 00 44 3a 74 24 1c 75 14 66 90 0f 00 2d f6 df ab 09 f3 0f 1e fa fb f4 c0 fe ff ff fb e9 ba fe ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 4c
RSP: 0018:ffffc90000007860 EFLAGS: 00000246
RAX: f13274a761d8ab00 RBX: 1ffff92000000f10 RCX: ffffffff816b847a
RDX: dffffc0000000000 RSI: ffffffff8aea8e20 RDI: ffffffff8b384480
RBP: ffffc90000007930 R08: dffffc0000000000 R09: fffffbfff2065265
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888018f7e0f0
R13: dffffc0000000000 R14: 0000000000000003 R15: ffffc900000078a0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0fde9a5798 CR3: 0000000038fc0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:598 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6ff/0xc50 kernel/locking/qspinlock.c:511
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:586 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock+0x297/0x3a0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:350 [inline]
fq_pie_timer+0x8b/0x270 net/sched/sch_fq_pie.c:377
call_timer_fn+0x178/0x580 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x64f/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2ab/0x908 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x159/0x240 kernel/softirq.c:650
irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 de 03 2a f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 f3 ad a5 f6 65 8b 05 54 67 4a 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90004acf6c0 EFLAGS: 00000206
RAX: f13274a761d8ab00 RBX: 1ffff92000959edc RCX: ffffffff816b847a
RDX: dffffc0000000000 RSI: ffffffff8aea8e20 RDI: 0000000000000001
RBP: ffffc90004acf758 R08: dffffc0000000000 R09: fffffbfff2065253
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000959ed8 R14: ffffc90004acf6e0 R15: 0000000000000246
__debug_check_no_obj_freed lib/debugobjects.c:1033 [inline]
debug_check_no_obj_freed+0x5ca/0x650 lib/debugobjects.c:1054
free_pages_prepare mm/page_alloc.c:1308 [inline]
free_unref_page_prepare+0x241/0xa30 mm/page_alloc.c:2564
free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705
release_pages+0x2193/0x2470 mm/swap.c:1042
tlb_batch_pages_flush mm/mmu_gather.c:97 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299
tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391
exit_mmap+0x3da/0xaf0 mm/mmap.c:3123
__mmput+0x115/0x3c0 kernel/fork.c:1351
exit_mm+0x227/0x310 kernel/exit.c:567
do_exit+0x612/0x2290 kernel/exit.c:861
do_group_exit+0x206/0x2c0 kernel/exit.c:1024
__do_sys_exit_group kernel/exit.c:1035 [inline]
__se_sys_exit_group kernel/exit.c:1033 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9276c8c169
Code: Unable to access opcode bytes at 0x7f9276c8c13f.
RSP: 002b:00007ffd133ecdd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f9276c8c169
RDX: 00007f9276c3e01b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00007f9276800000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd133ecec0
CPU: 1 PID: 9361 Comm: udevd Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__list_add include/linux/list.h:74 [inline]
RIP: 0010:list_add_tail include/linux/list.h:102 [inline]
RIP: 0010:list_move_tail include/linux/list.h:230 [inline]
RIP: 0010:fq_pie_qdisc_dequeue+0x43e/0xa40 net/sched/sch_fq_pie.c:248
Code: 08 4c 89 f7 e8 53 3d 12 f9 4d 89 26 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 3b 3d 12 f9 48 8b 44 24 10 49 89 04 24 <49> 8d 5c 24 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df
RSP: 0018:ffffc900001e0328 EFLAGS: 00000246
RAX: ffff888018f7e2e0 RBX: dffffc0000000000 RCX: ffff88807809d940
RDX: 0000000000000302 RSI: ffff888018f7e2e0 RDI: ffff88803eda74b0
RBP: ffff888018f7e2e0 R08: ffffffff88d11488 R09: ffffffff88ba5b2e
R10: 0000000000000002 R11: ffff88807809d940 R12: ffff88803eda74b0
R13: ffff888018f7e000 R14: ffff888018f7e2e8 R15: ffff888018f7e2f0
FS: 00007f1f6ef9ec80(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0fde90e841 CR3: 000000006158a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
dequeue_skb net/sched/sch_generic.c:292 [inline]
qdisc_restart net/sched/sch_generic.c:397 [inline]
__qdisc_run+0x26e/0x20a0 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3868 [inline]
__dev_queue_xmit+0x1397/0x38b0 net/core/dev.c:4210
neigh_output include/net/neighbour.h:544 [inline]
ip6_finish_output2+0xf80/0x1560 net/ipv6/ip6_output.c:134
__ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
ip6_finish_output+0x6b0/0xa80 net/ipv6/ip6_output.c:206
dst_output include/net/dst.h:458 [inline]
NF_HOOK include/linux/netfilter.h:303 [inline]
ndisc_send_skb+0xb08/0x1390 net/ipv6/ndisc.c:508
addrconf_rs_timer+0x35b/0x620 net/ipv6/addrconf.c:3936
call_timer_fn+0x178/0x580 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x64f/0x860 kernel/time/timer.c:2022
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
__do_softirq+0x2ab/0x908 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x159/0x240 kernel/softirq.c:650
irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x25a/0x520 kernel/locking/lockdep.c:5709
Code: 2b 00 74 08 4c 89 f7 e8 54 3e 78 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000332f740 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000665ef4 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8aea9fa0 RDI: ffffffff8b384480
RBP: ffffc9000332f890 R08: dffffc0000000000 R09: fffffbfff206524f
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000665ef0
R13: dffffc0000000000 R14: ffffc9000332f7a0 R15: 0000000000000246
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:350 [inline]
lockref_put_or_lock+0x26/0xc0 lib/lockref.c:147
fast_dput fs/dcache.c:775 [inline]
dput+0x20e/0x420 fs/dcache.c:900
open_last_lookups fs/namei.c:3575 [inline]
path_openat+0x2991/0x3170 fs/namei.c:3788
do_filp_open+0x234/0x490 fs/namei.c:3818
do_sys_openat2+0x13f/0x500 fs/open.c:1356
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x247/0x290 fs/open.c:1383
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1f6eb169a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffcff7d2bc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1f6eb169a4
RDX: 0000000000080241 RSI: 00007ffcff7d3108 RDI: 00000000ffffff9c
RBP: 00007ffcff7d3108 R08: 0000000000000004 R09: 0000000000000001
R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000080241
R13: 000056324900072e R14: 0000000000000001 R15: 000056324901b160