rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=b4b/1/0x4000000000000000 softirq=255417/255417 fqs=0 
	(detected by 0, t=10506 jiffies, g=357845, q=2049)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21032 Comm: syz-executor.0 Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:lock_acquire+0x225/0x4f0 kernel/locking/lockdep.c:5625
Code: 0f 85 a4 01 00 00 49 89 de 48 c1 eb 03 42 80 3c 2b 00 74 08 4c 89 f7 e8 a9 59 67 00 48 c7 44 24 60 00 00 00 00 9c 8f 44 24 60 <42> 80 3c 2b 00 74 08 4c 89 f7 e8 0c 59 67 00 f6 44 24 61 02 0f 85
RSP: 0000:ffffc90000dd0b40 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff920001ba174 RCX: 1ffff920001ba114
RDX: dffffc0000000000 RSI: ffffffff8a8b1e80 RDI: ffffffff8ad87b40
RBP: ffffc90000dd0ca0 R08: dffffc0000000000 R09: fffffbfff1f79a21
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba170
R13: dffffc0000000000 R14: ffffc90000dd0ba0 R15: 0000000000000046
FS:  00007f788db096c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb960a4e988 CR3: 00000000b01b5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:269
 rcu_read_lock include/linux/rcupdate.h:696 [inline]
 advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:769
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:unwind_next_frame+0x139/0x1fa0 arch/x86/kernel/unwind_orc.c:448
Code: 89 df e8 ca 6e 91 00 48 ba 00 00 00 00 00 fc ff df f6 03 03 0f 85 83 15 00 00 49 8d 6f 35 49 89 ec 49 c1 ec 03 41 0f b6 04 14 <84> c0 0f 85 f1 16 00 00 4c 0f be 6d 00 48 8b 44 24 28 80 3c 10 00
RSP: 0000:ffffc9000c326388 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8a24f600
RDX: dffffc0000000000 RSI: ffffffff816dc4e3 RDI: ffffffff8138689b
RBP: ffffc9000c326475 R08: 0000000000000000 R09: ffffc9000c326530
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001864c8e
R13: ffffffff816dc590 R14: ffffffff816dc4e3 R15: ffffc9000c326440
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3583
 __ipv6_dev_mc_dec+0x2d2/0x330 net/ipv6/mcast.c:982
 ipv6_mc_destroy_dev+0x32d/0x570 net/ipv6/mcast.c:2800
 addrconf_ifdown+0x16fe/0x1bb0 net/ipv6/addrconf.c:3904
 addrconf_notify+0x432/0xf30
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 unregister_netdevice_many+0xf1b/0x18f0 net/core/dev.c:11087
 __rtnl_newlink net/core/rtnetlink.c:3532 [inline]
 rtnl_newlink+0x1d2d/0x2070 net/core/rtnetlink.c:3549
 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5630
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483
 __sys_sendmsg net/socket.c:2512 [inline]
 __do_sys_sendmsg net/socket.c:2521 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2519
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f788f587ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f788db090c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f788f6a6f80 RCX: 00007f788f587ae9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f788f5d347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f788f6a6f80 R15: 00007ffc19ba1458
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g357845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=227137
rcu: rcu_preempt kthread starved for 10506 jiffies! g357845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:I stack:26712 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6372
 schedule+0x11b/0x1f0 kernel/sched/core.c:6455
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
 rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21032 Comm: syz-executor.0 Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:104 [inline]
RIP: 0010:do_raw_spin_unlock+0xe9/0x8b0 kernel/locking/spinlock_debug.c:140
Code: 8b 06 65 8b 0d 90 1e 9e 7e 39 c8 0f 85 c6 02 00 00 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2c 00 74 08 4c 89 ef e8 57 e1 65 00 <49> c7 45 00 ff ff ff ff 0f b6 04 2b 84 c0 0f 85 ca 03 00 00 41 c7
RSP: 0000:ffffc90000dd0c60 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff11017365441 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b9b2a200
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed1017365441
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11017365442
R13: ffff8880b9b2a210 R14: ffff8880b9b2a208 R15: ffff8880b9b2a200
FS:  00007f788db096c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb960a4e988 CR3: 00000000b01b5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:159 [inline]
 _raw_spin_unlock_irqrestore+0x7d/0x130 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1681 [inline]
 __hrtimer_run_queues+0x48c/0xcf0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:unwind_next_frame+0x139/0x1fa0 arch/x86/kernel/unwind_orc.c:448
Code: 89 df e8 ca 6e 91 00 48 ba 00 00 00 00 00 fc ff df f6 03 03 0f 85 83 15 00 00 49 8d 6f 35 49 89 ec 49 c1 ec 03 41 0f b6 04 14 <84> c0 0f 85 f1 16 00 00 4c 0f be 6d 00 48 8b 44 24 28 80 3c 10 00
RSP: 0000:ffffc9000c326388 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8a24f600
RDX: dffffc0000000000 RSI: ffffffff816dc4e3 RDI: ffffffff8138689b
RBP: ffffc9000c326475 R08: 0000000000000000 R09: ffffc9000c326530
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92001864c8e
R13: ffffffff816dc590 R14: ffffffff816dc4e3 R15: ffffc9000c326440
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3583
 __ipv6_dev_mc_dec+0x2d2/0x330 net/ipv6/mcast.c:982
 ipv6_mc_destroy_dev+0x32d/0x570 net/ipv6/mcast.c:2800
 addrconf_ifdown+0x16fe/0x1bb0 net/ipv6/addrconf.c:3904
 addrconf_notify+0x432/0xf30
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2018 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
 call_netdevice_notifiers net/core/dev.c:2044 [inline]
 unregister_netdevice_many+0xf1b/0x18f0 net/core/dev.c:11087
 __rtnl_newlink net/core/rtnetlink.c:3532 [inline]
 rtnl_newlink+0x1d2d/0x2070 net/core/rtnetlink.c:3549
 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5630
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x7b6/0x980 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1924
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2429
 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2483
 __sys_sendmsg net/socket.c:2512 [inline]
 __do_sys_sendmsg net/socket.c:2521 [inline]
 __se_sys_sendmsg+0x19a/0x260 net/socket.c:2519
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f788f587ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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:00007f788db090c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f788f6a6f80 RCX: 00007f788f587ae9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007f788f5d347a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f788f6a6f80 R15: 00007ffc19ba1458
 </TASK>