rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=b50c/1/0x4000000000000000 softirq=8765/8767 fqs=165
rcu: (detected by 0, t=10504 jiffies, g=11773, q=206 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5228 Comm: syz-executor283 Not tainted 6.7.0-rc5-syzkaller-01103-g509afc745270 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:hlock_class+0x56/0x130 kernel/locking/lockdep.c:228
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 8e f1 91 e8 f2 4e 77 00 48 0f a3 1d 1a 5f 8a 10 <73> 0f 48 69 c3 d0 00 00 00 5b 48 05 a0 92 f1 91 c3 48 c7 c0 e0 75
RSP: 0018:ffffc900001f0b40 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000020 RCX: ffffffff81672f5e
RDX: fffffbfff23e31d1 RSI: 0000000000000008 RDI: ffffffff91f18e80
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff23e31d0
R10: ffffffff91f18e87 R11: 0000000000000002 R12: ffff888079ffe450
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000020
FS: 00007f619ba096c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f619c2df074 CR3: 0000000024b5f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_wait_context kernel/locking/lockdep.c:4773 [inline]
__lock_acquire+0x402/0x3b20 kernel/locking/lockdep.c:5087
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
advance_sched+0x67f/0xc60 net/sched/sch_taprio.c:996
__run_hrtimer kernel/time/hrtimer.c:1688 [inline]
__hrtimer_run_queues+0x203/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 46 e8 e3 f6 48 89 df e8 ae 5f e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 c5 18 d6 f6 65 8b 05 46 95 7f 75 85 c0 74 12 5b
RSP: 0018:ffffc900046a7260 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff88806f7b42e8 RCX: 1ffffffff23ecfb2
RDX: 0000000000000000 RSI: ffffffff8accb520 RDI: ffffffff8b2f1360
RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff23e31e8
R10: ffffffff91f18f47 R11: 0000000000000004 R12: 0000003e99650000
R13: 0000000000000002 R14: 0000000000000002 R15: 0000000000000000
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
taprio_change+0x2908/0x38d0 net/sched/sch_taprio.c:1993
qdisc_change net/sched/sch_api.c:1387 [inline]
tc_modify_qdisc+0x7d5/0x1c30 net/sched/sch_api.c:1717
rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6560
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544
netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367
netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0xd5/0x180 net/socket.c:745
____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
__sys_sendmsg+0x117/0x1e0 net/socket.c:2667
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f619c259ad9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 1f 00 00 90 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f619ba09168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f619c2e41e8 RCX: 00007f619c259ad9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004
RBP: 00007f619c2e41e0 R08: 00007f619ba096c0 R09: 0000000000000000
R10: 00007f619ba096c0 R11: 0000000000000246 R12: 00007f619c2e41ec
R13: 000000000000000b R14: 00007ffd76a788b0 R15: 00007ffd76a78998
rcu: rcu_preempt kthread starved for 9678 jiffies! g11773 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:27904 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 5150 Comm: kworker/0:6 Not tainted 6.7.0-rc5-syzkaller-01103-g509afc745270 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x3ff/0xc70 kernel/locking/qspinlock.c:511
Code: 41 83 e4 07 41 bd 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 3c 01 eb 0c f3 90 41 83 ee 01 0f 84 c2 04 00 00 41 0f b6 07 <44> 38 e0 7f 08 84 c0 0f 85 00 06 00 00 0f b6 03 84 c0 75 dc be 02
RSP: 0018:ffffc90000007568 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88806f7b40f0 RCX: 1ffff1100def681e
RDX: 0000000000000001 RSI: ffffffff8a843829 RDI: ffffffff8b2f1360
RBP: ffff8880b983d580 R08: 0000000000000001 R09: fffffbfff23e31e8
R10: ffffffff91f18f47 R11: 0000000000000007 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000001c36 R15: ffffed100def681e
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555557031918 CR3: 00000000794f8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0x20e/0x2b0 kernel/locking/spinlock_debug.c:115
spin_lock include/linux/spinlock.h:351 [inline]
__dev_xmit_skb net/core/dev.c:3803 [inline]
__dev_queue_xmit+0x1cd4/0x3d30 net/core/dev.c:4311
dev_queue_xmit include/linux/netdevice.h:3165 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip6_finish_output2+0x10ae/0x1820 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf70 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xa13/0x18f0 net/ipv6/ndisc.c:509
ndisc_send_rs+0x133/0x6a0 net/ipv6/ndisc.c:719
addrconf_rs_timer+0x412/0x850 net/ipv6/addrconf.c:3985
call_timer_fn+0x193/0x590 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x764/0xb20 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x21a/0x8de kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:284 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline]
RIP: 0010:gc_worker+0x2e1/0x17e0 net/netfilter/nf_conntrack_core.c:1490
Code: 00 00 48 c7 c7 28 ae 19 8f e8 bb 28 b5 f8 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 a9 aa d4 f8 48 85 db 58 0f 85 9f 10 00 00 0a af d4 f8 eb 07 e8 03 af d4 f8 f3 90 44 8b 35 0a c7 66 06 31
RSP: 0018:ffffc900044dfbf0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff88b2f2cd
RDX: ffff88801d41d940 RSI: ffffffff88b2f2dc RDI: 0000000000000007
RBP: ffff888025800000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 000000000001f43b
R13: dffffc0000000000 R14: 000000000003e875 R15: 0000000000040000
process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
process_scheduled_works kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242