rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=1bec/1/0x4000000000000000 softirq=50638/50638 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=74681, q=241 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12504 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-00234-g7367539ad4b0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:lock_release+0x61b/0x9f0 kernel/locking/lockdep.c:5777
Code: c7 84 24 90 00 00 00 00 00 00 00 9c 8f 84 24 90 00 00 00 42 80 3c 3b 00 74 08 4c 89 f7 e8 5d b2 84 00 f6 84 24 91 00 00 00 02 <75> 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 4b
RSP: 0018:ffffc90000a08b80 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000141182 RCX: ffffc90000a08c03
RDX: 0000000000000004 RSI: ffffffff8bcaca20 RDI: ffffffff8c1eaaa0
RBP: ffffc90000a08cb0 R08: ffffffff8fa7cf2f R09: 1ffffffff1f4f9e5
R10: dffffc0000000000 R11: fffffbfff1f4f9e6 R12: 1ffff9200014117c
R13: 0000000000000046 R14: ffffc90000a08c10 R15: dffffc0000000000
FS:  000055557611a480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61a5d7a978 CR3: 000000006c58c000 CR4: 00000000003506f0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x481/0xd50 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:220 [inline]
RIP: 0010:unwind_next_frame+0x2ca/0x2a00 arch/x86/kernel/unwind_orc.c:494
Code: 7f 48 8d 8c 00 c4 95 24 90 48 c7 c0 62 67 cc 90 48 89 4c 24 18 48 39 c1 0f 83 bd 1d 00 00 4b 8d 0c 64 48 8d 8c 09 c4 95 24 90 <48> 39 c1 0f 87 a8 1d 00 00 44 89 e7 44 89 fe e8 42 bf 54 00 45 39
RSP: 0018:ffffc90004e9dc68 EFLAGS: 00000283
RAX: ffffffff90cc6762 RBX: ffffffff90f0cb3c RCX: ffffffff90b00dae
RDX: ffff88801e259e00 RSI: 00000000000918f5 RDI: 00000000000ac000
RBP: 00000000000918f5 R08: ffffffff814151b4 R09: ffffc90004e9de30
R10: 0000000000000003 R11: ffffffff8181ef10 R12: 0000000000173ea7
R13: 00000000000ac001 R14: dffffc0000000000 R15: 0000000000173ea6
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:3966 [inline]
 __kmalloc_node_track_caller+0x24e/0x4e0 mm/slub.c:3986
 kmemdup+0x2a/0x60 mm/util.c:131
 sctp_addr_wq_mgmt+0x2f8/0x720 net/sctp/protocol.c:756
 sctp_inet6addr_event+0x566/0x730 net/sctp/ipv6.c:94
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 atomic_notifier_call_chain+0xdb/0x180 kernel/notifier.c:231
 ipv6_add_addr+0xde0/0x1090 net/ipv6/addrconf.c:1179
 add_addr+0x1ba/0x490 net/ipv6/addrconf.c:3200
 add_v4_addrs+0x8dd/0x1160 net/ipv6/addrconf.c:3265
 addrconf_sit_config net/ipv6/addrconf.c:3517 [inline]
 addrconf_init_auto_addrs+0x363/0xeb0 net/ipv6/addrconf.c:3554
 addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3741
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8769
 do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2884
 __rtnl_newlink net/core/rtnetlink.c:3680 [inline]
 rtnl_newlink+0x180b/0x20a0 net/core/rtnetlink.c:3727
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c8847f99c
Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b
RSP: 002b:00007ffec18a18b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1c890d4620 RCX: 00007f1c8847f99c
RDX: 0000000000000020 RSI: 00007f1c890d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffec18a1904 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f1c890d4670 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g74681 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=31608
rcu: rcu_preempt kthread starved for 10506 jiffies! g74681 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:24016 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>